/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 18:20:46,891 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 18:20:46,893 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 18:20:46,921 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 18:20:46,921 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 18:20:46,924 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 18:20:46,925 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 18:20:46,929 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 18:20:46,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 18:20:46,934 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 18:20:46,934 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 18:20:46,935 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 18:20:46,935 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 18:20:46,937 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 18:20:46,938 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 18:20:46,939 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 18:20:46,940 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 18:20:46,941 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 18:20:46,942 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 18:20:46,946 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 18:20:46,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 18:20:46,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 18:20:46,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 18:20:46,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 18:20:46,955 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-05 18:20:46,955 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-05 18:20:46,955 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-05 18:20:46,961 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-05 18:20:46,961 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-05 18:20:46,961 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-05 18:20:46,962 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 18:20:46,962 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 18:20:46,963 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 18:20:46,964 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 18:20:46,964 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 18:20:46,964 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 18:20:46,965 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 18:20:46,965 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 18:20:46,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 18:20:46,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 18:20:46,966 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 18:20:46,967 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 18:20:46,996 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 18:20:46,996 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 18:20:46,997 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 18:20:46,997 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 18:20:46,999 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 18:20:46,999 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 18:20:46,999 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 18:20:46,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 18:20:46,999 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 18:20:46,999 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 18:20:47,000 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 18:20:47,000 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 18:20:47,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 18:20:47,000 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 18:20:47,001 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 18:20:47,001 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 18:20:47,001 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 18:20:47,001 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 18:20:47,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 18:20:47,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 18:20:47,001 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 18:20:47,001 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 18:20:47,001 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 18:20:47,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 18:20:47,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 18:20:47,002 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 18:20:47,002 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 18:20:47,002 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 18:20:47,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 18:20:47,002 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 18:20:47,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 18:20:47,002 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 18:20:47,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 18:20:47,283 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 18:20:47,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 18:20:47,286 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-05 18:20:47,286 INFO L275 PluginConnector]: CDTParser initialized [2021-06-05 18:20:47,287 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-2.i [2021-06-05 18:20:47,340 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35f7e9310/f461f22221004df09f6899dc6eb270a9/FLAG993c470f2 [2021-06-05 18:20:47,788 INFO L306 CDTParser]: Found 1 translation units. [2021-06-05 18:20:47,789 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i [2021-06-05 18:20:47,805 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35f7e9310/f461f22221004df09f6899dc6eb270a9/FLAG993c470f2 [2021-06-05 18:20:47,819 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35f7e9310/f461f22221004df09f6899dc6eb270a9 [2021-06-05 18:20:47,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 18:20:47,822 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-05 18:20:47,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-05 18:20:47,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-05 18:20:47,828 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-05 18:20:47,828 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 06:20:47" (1/1) ... [2021-06-05 18:20:47,829 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7795219f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:20:47, skipping insertion in model container [2021-06-05 18:20:47,829 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 06:20:47" (1/1) ... [2021-06-05 18:20:47,834 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-05 18:20:47,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-05 18:20:48,136 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i[30964,30977] [2021-06-05 18:20:48,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 18:20:48,145 INFO L203 MainTranslator]: Completed pre-run [2021-06-05 18:20:48,176 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i[30964,30977] [2021-06-05 18:20:48,180 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 18:20:48,221 INFO L208 MainTranslator]: Completed translation [2021-06-05 18:20:48,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:20:48 WrapperNode [2021-06-05 18:20:48,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-05 18:20:48,222 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 18:20:48,222 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 18:20:48,222 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 18:20:48,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:20:48" (1/1) ... [2021-06-05 18:20:48,234 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:20:48" (1/1) ... [2021-06-05 18:20:48,245 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 18:20:48,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 18:20:48,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 18:20:48,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 18:20:48,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:20:48" (1/1) ... [2021-06-05 18:20:48,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:20:48" (1/1) ... [2021-06-05 18:20:48,252 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:20:48" (1/1) ... [2021-06-05 18:20:48,252 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:20:48" (1/1) ... [2021-06-05 18:20:48,255 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:20:48" (1/1) ... [2021-06-05 18:20:48,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:20:48" (1/1) ... [2021-06-05 18:20:48,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:20:48" (1/1) ... [2021-06-05 18:20:48,259 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 18:20:48,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 18:20:48,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 18:20:48,260 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 18:20:48,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:20:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 18:20:48,327 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-06-05 18:20:48,327 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-06-05 18:20:48,327 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-06-05 18:20:48,328 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-06-05 18:20:48,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-05 18:20:48,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-06-05 18:20:48,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-05 18:20:48,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-05 18:20:48,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-05 18:20:48,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-06-05 18:20:48,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 18:20:48,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 18:20:48,329 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 18:20:48,649 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 18:20:48,649 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-06-05 18:20:48,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:20:48 BoogieIcfgContainer [2021-06-05 18:20:48,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 18:20:48,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 18:20:48,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 18:20:48,653 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 18:20:48,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.06 06:20:47" (1/3) ... [2021-06-05 18:20:48,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@131acaf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:20:48, skipping insertion in model container [2021-06-05 18:20:48,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:20:48" (2/3) ... [2021-06-05 18:20:48,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@131acaf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:20:48, skipping insertion in model container [2021-06-05 18:20:48,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:20:48" (3/3) ... [2021-06-05 18:20:48,655 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2021-06-05 18:20:48,659 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 18:20:48,659 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 18:20:48,659 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 18:20:48,660 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 18:20:48,684 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,684 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,684 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,684 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,684 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,684 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,685 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,685 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,685 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,685 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,686 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,686 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,686 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,686 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,687 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,687 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,687 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,687 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,687 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,688 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,688 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,688 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,689 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,689 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,689 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,689 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,689 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,690 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,690 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,690 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,690 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,690 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,690 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,691 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,691 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,691 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,691 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,692 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,692 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,692 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,692 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,693 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,693 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,693 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,693 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,693 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,693 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,693 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,694 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,694 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,694 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,694 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,694 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,694 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,695 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,695 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,697 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,697 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,697 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,697 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,698 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,698 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,704 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,704 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,704 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,705 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,705 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,705 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:20:48,707 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 18:20:48,722 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 18:20:48,736 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 18:20:48,736 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 18:20:48,736 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 18:20:48,736 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 18:20:48,736 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 18:20:48,736 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 18:20:48,736 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 18:20:48,737 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 18:20:48,742 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 66 transitions, 142 flow [2021-06-05 18:20:48,796 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:48,800 INFO L276 IsEmpty]: Start isEmpty. Operand has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:48,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 18:20:48,807 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:48,807 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:48,808 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:48,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:48,811 INFO L82 PathProgramCache]: Analyzing trace with hash 855509438, now seen corresponding path program 1 times [2021-06-05 18:20:48,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:48,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939211423] [2021-06-05 18:20:48,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:48,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:49,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:49,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:49,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939211423] [2021-06-05 18:20:49,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939211423] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:20:49,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:20:49,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 18:20:49,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461461185] [2021-06-05 18:20:49,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 18:20:49,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:49,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 18:20:49,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 18:20:49,131 INFO L87 Difference]: Start difference. First operand has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:49,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:49,268 INFO L93 Difference]: Finished difference Result 3294 states and 9568 transitions. [2021-06-05 18:20:49,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 18:20:49,269 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 18:20:49,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:49,285 INFO L225 Difference]: With dead ends: 3294 [2021-06-05 18:20:49,286 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 18:20:49,286 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 18:20:49,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 18:20:49,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 800. [2021-06-05 18:20:49,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.728410513141427) internal successors, (2180), 799 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:49,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2180 transitions. [2021-06-05 18:20:49,344 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2180 transitions. Word has length 32 [2021-06-05 18:20:49,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:49,344 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2180 transitions. [2021-06-05 18:20:49,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:49,344 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2180 transitions. [2021-06-05 18:20:49,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 18:20:49,346 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:49,347 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:49,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 18:20:49,347 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:49,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:49,347 INFO L82 PathProgramCache]: Analyzing trace with hash 2058414913, now seen corresponding path program 1 times [2021-06-05 18:20:49,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:49,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357836221] [2021-06-05 18:20:49,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:49,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:49,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:49,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357836221] [2021-06-05 18:20:49,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357836221] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:20:49,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:20:49,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 18:20:49,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365720893] [2021-06-05 18:20:49,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 18:20:49,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:49,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 18:20:49,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 18:20:49,483 INFO L87 Difference]: Start difference. First operand 800 states and 2180 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:49,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:49,583 INFO L93 Difference]: Finished difference Result 1302 states and 3436 transitions. [2021-06-05 18:20:49,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 18:20:49,584 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 18:20:49,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:49,589 INFO L225 Difference]: With dead ends: 1302 [2021-06-05 18:20:49,589 INFO L226 Difference]: Without dead ends: 920 [2021-06-05 18:20:49,590 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:20:49,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-06-05 18:20:49,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 864. [2021-06-05 18:20:49,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.6882966396292005) internal successors, (2320), 863 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:49,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2320 transitions. [2021-06-05 18:20:49,615 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2320 transitions. Word has length 36 [2021-06-05 18:20:49,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:49,616 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2320 transitions. [2021-06-05 18:20:49,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:49,616 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2320 transitions. [2021-06-05 18:20:49,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 18:20:49,620 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:49,620 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:49,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 18:20:49,621 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:49,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:49,621 INFO L82 PathProgramCache]: Analyzing trace with hash 93608864, now seen corresponding path program 1 times [2021-06-05 18:20:49,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:49,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312505095] [2021-06-05 18:20:49,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:49,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:49,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:49,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312505095] [2021-06-05 18:20:49,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312505095] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:20:49,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:20:49,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 18:20:49,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180603724] [2021-06-05 18:20:49,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 18:20:49,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:49,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 18:20:49,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 18:20:49,737 INFO L87 Difference]: Start difference. First operand 864 states and 2320 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:49,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:49,813 INFO L93 Difference]: Finished difference Result 1332 states and 3512 transitions. [2021-06-05 18:20:49,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 18:20:49,813 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 18:20:49,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:49,817 INFO L225 Difference]: With dead ends: 1332 [2021-06-05 18:20:49,817 INFO L226 Difference]: Without dead ends: 1072 [2021-06-05 18:20:49,817 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 18:20:49,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-06-05 18:20:49,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 876. [2021-06-05 18:20:49,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.7062857142857144) internal successors, (2368), 875 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:49,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2368 transitions. [2021-06-05 18:20:49,836 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2368 transitions. Word has length 40 [2021-06-05 18:20:49,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:49,837 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2368 transitions. [2021-06-05 18:20:49,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:49,837 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2368 transitions. [2021-06-05 18:20:49,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 18:20:49,838 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:49,838 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:49,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 18:20:49,859 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:49,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:49,860 INFO L82 PathProgramCache]: Analyzing trace with hash -466628886, now seen corresponding path program 2 times [2021-06-05 18:20:49,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:49,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370498154] [2021-06-05 18:20:49,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:49,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:49,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:49,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:49,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370498154] [2021-06-05 18:20:49,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370498154] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:20:49,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:20:49,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 18:20:49,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520943765] [2021-06-05 18:20:49,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 18:20:49,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:49,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 18:20:49,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 18:20:49,948 INFO L87 Difference]: Start difference. First operand 876 states and 2368 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:50,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:50,074 INFO L93 Difference]: Finished difference Result 1836 states and 4872 transitions. [2021-06-05 18:20:50,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 18:20:50,077 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 18:20:50,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:50,082 INFO L225 Difference]: With dead ends: 1836 [2021-06-05 18:20:50,083 INFO L226 Difference]: Without dead ends: 1505 [2021-06-05 18:20:50,084 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:20:50,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-06-05 18:20:50,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 975. [2021-06-05 18:20:50,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 2.6981519507186857) internal successors, (2628), 974 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:50,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2628 transitions. [2021-06-05 18:20:50,104 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2628 transitions. Word has length 40 [2021-06-05 18:20:50,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:50,105 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 2628 transitions. [2021-06-05 18:20:50,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:50,106 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2628 transitions. [2021-06-05 18:20:50,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 18:20:50,107 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:50,107 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:50,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 18:20:50,107 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:50,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:50,107 INFO L82 PathProgramCache]: Analyzing trace with hash -78750066, now seen corresponding path program 3 times [2021-06-05 18:20:50,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:50,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983640173] [2021-06-05 18:20:50,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:50,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:50,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:50,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983640173] [2021-06-05 18:20:50,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983640173] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:20:50,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:20:50,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 18:20:50,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11246539] [2021-06-05 18:20:50,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 18:20:50,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:50,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 18:20:50,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 18:20:50,167 INFO L87 Difference]: Start difference. First operand 975 states and 2628 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:50,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:50,255 INFO L93 Difference]: Finished difference Result 2211 states and 5878 transitions. [2021-06-05 18:20:50,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 18:20:50,255 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 18:20:50,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:50,262 INFO L225 Difference]: With dead ends: 2211 [2021-06-05 18:20:50,262 INFO L226 Difference]: Without dead ends: 1944 [2021-06-05 18:20:50,262 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:20:50,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-06-05 18:20:50,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1127. [2021-06-05 18:20:50,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1126 states have (on average 2.769982238010657) internal successors, (3119), 1126 states have internal predecessors, (3119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:50,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3119 transitions. [2021-06-05 18:20:50,288 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3119 transitions. Word has length 40 [2021-06-05 18:20:50,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:50,288 INFO L482 AbstractCegarLoop]: Abstraction has 1127 states and 3119 transitions. [2021-06-05 18:20:50,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:50,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3119 transitions. [2021-06-05 18:20:50,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 18:20:50,289 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:50,289 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:50,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 18:20:50,289 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:50,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:50,290 INFO L82 PathProgramCache]: Analyzing trace with hash -56406816, now seen corresponding path program 4 times [2021-06-05 18:20:50,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:50,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008625393] [2021-06-05 18:20:50,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:50,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:50,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:50,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:50,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008625393] [2021-06-05 18:20:50,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008625393] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:20:50,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:20:50,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 18:20:50,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857232907] [2021-06-05 18:20:50,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 18:20:50,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:50,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 18:20:50,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 18:20:50,374 INFO L87 Difference]: Start difference. First operand 1127 states and 3119 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:50,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:50,491 INFO L93 Difference]: Finished difference Result 1671 states and 4527 transitions. [2021-06-05 18:20:50,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 18:20:50,492 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 18:20:50,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:50,497 INFO L225 Difference]: With dead ends: 1671 [2021-06-05 18:20:50,497 INFO L226 Difference]: Without dead ends: 1173 [2021-06-05 18:20:50,497 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 91.0ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:20:50,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-06-05 18:20:50,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 922. [2021-06-05 18:20:50,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 2.732899022801303) internal successors, (2517), 921 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:50,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 2517 transitions. [2021-06-05 18:20:50,515 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 2517 transitions. Word has length 40 [2021-06-05 18:20:50,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:50,515 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 2517 transitions. [2021-06-05 18:20:50,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:50,516 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 2517 transitions. [2021-06-05 18:20:50,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 18:20:50,517 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:50,517 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:50,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 18:20:50,518 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:50,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:50,518 INFO L82 PathProgramCache]: Analyzing trace with hash -709715269, now seen corresponding path program 1 times [2021-06-05 18:20:50,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:50,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247539391] [2021-06-05 18:20:50,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:50,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:50,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:50,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:50,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247539391] [2021-06-05 18:20:50,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247539391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:50,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503639131] [2021-06-05 18:20:50,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:50,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:50,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 18:20:50,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:50,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503639131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:50,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:50,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 18:20:50,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303870819] [2021-06-05 18:20:50,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 18:20:50,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:50,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 18:20:50,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:20:50,895 INFO L87 Difference]: Start difference. First operand 922 states and 2517 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:51,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:51,057 INFO L93 Difference]: Finished difference Result 1526 states and 4027 transitions. [2021-06-05 18:20:51,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 18:20:51,058 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 18:20:51,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:51,062 INFO L225 Difference]: With dead ends: 1526 [2021-06-05 18:20:51,063 INFO L226 Difference]: Without dead ends: 1256 [2021-06-05 18:20:51,063 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 130.0ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:20:51,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-06-05 18:20:51,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1113. [2021-06-05 18:20:51,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 1112 states have (on average 2.741007194244604) internal successors, (3048), 1112 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:51,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 3048 transitions. [2021-06-05 18:20:51,092 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 3048 transitions. Word has length 45 [2021-06-05 18:20:51,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:51,093 INFO L482 AbstractCegarLoop]: Abstraction has 1113 states and 3048 transitions. [2021-06-05 18:20:51,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:51,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 3048 transitions. [2021-06-05 18:20:51,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 18:20:51,094 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:51,094 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:51,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-05 18:20:51,314 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:51,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:51,314 INFO L82 PathProgramCache]: Analyzing trace with hash -321836449, now seen corresponding path program 2 times [2021-06-05 18:20:51,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:51,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836374256] [2021-06-05 18:20:51,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:51,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:51,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:51,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836374256] [2021-06-05 18:20:51,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836374256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:51,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666141140] [2021-06-05 18:20:51,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:51,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:20:51,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:51,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 18:20:51,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:51,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:51,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666141140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:51,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:51,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 18:20:51,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006340494] [2021-06-05 18:20:51,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 18:20:51,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:51,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 18:20:51,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 18:20:51,561 INFO L87 Difference]: Start difference. First operand 1113 states and 3048 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:51,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:51,668 INFO L93 Difference]: Finished difference Result 2408 states and 6431 transitions. [2021-06-05 18:20:51,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 18:20:51,669 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 18:20:51,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:51,676 INFO L225 Difference]: With dead ends: 2408 [2021-06-05 18:20:51,676 INFO L226 Difference]: Without dead ends: 2138 [2021-06-05 18:20:51,676 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:20:51,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-06-05 18:20:51,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1293. [2021-06-05 18:20:51,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1292 states have (on average 2.791795665634675) internal successors, (3607), 1292 states have internal predecessors, (3607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:51,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 3607 transitions. [2021-06-05 18:20:51,704 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 3607 transitions. Word has length 45 [2021-06-05 18:20:51,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:51,704 INFO L482 AbstractCegarLoop]: Abstraction has 1293 states and 3607 transitions. [2021-06-05 18:20:51,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:51,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 3607 transitions. [2021-06-05 18:20:51,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 18:20:51,705 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:51,705 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:51,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:51,921 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:51,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:51,921 INFO L82 PathProgramCache]: Analyzing trace with hash -299493199, now seen corresponding path program 3 times [2021-06-05 18:20:51,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:51,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025456933] [2021-06-05 18:20:51,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:51,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:51,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:51,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025456933] [2021-06-05 18:20:51,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025456933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:51,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188500849] [2021-06-05 18:20:51,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:52,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 18:20:52,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:52,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 18:20:52,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:52,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:52,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188500849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:52,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:52,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 18:20:52,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382596615] [2021-06-05 18:20:52,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 18:20:52,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:52,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 18:20:52,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:20:52,123 INFO L87 Difference]: Start difference. First operand 1293 states and 3607 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:52,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:52,343 INFO L93 Difference]: Finished difference Result 2196 states and 5861 transitions. [2021-06-05 18:20:52,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 18:20:52,343 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 18:20:52,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:52,348 INFO L225 Difference]: With dead ends: 2196 [2021-06-05 18:20:52,348 INFO L226 Difference]: Without dead ends: 1621 [2021-06-05 18:20:52,349 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 183.9ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:20:52,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-06-05 18:20:52,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1328. [2021-06-05 18:20:52,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 2.7754333082140166) internal successors, (3683), 1327 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:52,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 3683 transitions. [2021-06-05 18:20:52,372 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 3683 transitions. Word has length 45 [2021-06-05 18:20:52,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:52,372 INFO L482 AbstractCegarLoop]: Abstraction has 1328 states and 3683 transitions. [2021-06-05 18:20:52,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:52,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 3683 transitions. [2021-06-05 18:20:52,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 18:20:52,374 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:52,374 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:52,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:52,593 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:52,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:52,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1925374875, now seen corresponding path program 1 times [2021-06-05 18:20:52,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:52,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481120205] [2021-06-05 18:20:52,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:52,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:52,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:52,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:52,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481120205] [2021-06-05 18:20:52,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481120205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:52,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050919246] [2021-06-05 18:20:52,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:52,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:52,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 18:20:52,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:52,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:52,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050919246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:52,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:52,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 18:20:52,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440954627] [2021-06-05 18:20:52,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:20:52,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:52,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:20:52,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:20:52,840 INFO L87 Difference]: Start difference. First operand 1328 states and 3683 transitions. Second operand has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:52,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:52,973 INFO L93 Difference]: Finished difference Result 2068 states and 5483 transitions. [2021-06-05 18:20:52,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 18:20:52,973 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 18:20:52,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:52,978 INFO L225 Difference]: With dead ends: 2068 [2021-06-05 18:20:52,978 INFO L226 Difference]: Without dead ends: 1734 [2021-06-05 18:20:52,979 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 120.9ms TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:20:52,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-06-05 18:20:52,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1413. [2021-06-05 18:20:53,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 2.7287535410764874) internal successors, (3853), 1412 states have internal predecessors, (3853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:53,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 3853 transitions. [2021-06-05 18:20:53,003 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 3853 transitions. Word has length 50 [2021-06-05 18:20:53,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:53,003 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 3853 transitions. [2021-06-05 18:20:53,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:53,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 3853 transitions. [2021-06-05 18:20:53,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 18:20:53,005 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:53,005 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:53,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:53,221 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:53,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:53,221 INFO L82 PathProgramCache]: Analyzing trace with hash -558025153, now seen corresponding path program 2 times [2021-06-05 18:20:53,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:53,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460994995] [2021-06-05 18:20:53,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:53,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:53,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:53,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460994995] [2021-06-05 18:20:53,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460994995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:53,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114234709] [2021-06-05 18:20:53,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:53,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:20:53,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:53,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 18:20:53,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:53,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:53,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114234709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:53,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:53,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 18:20:53,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147951484] [2021-06-05 18:20:53,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 18:20:53,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:53,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 18:20:53,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 18:20:53,406 INFO L87 Difference]: Start difference. First operand 1413 states and 3853 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:53,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:53,488 INFO L93 Difference]: Finished difference Result 2061 states and 5277 transitions. [2021-06-05 18:20:53,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 18:20:53,488 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 18:20:53,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:53,506 INFO L225 Difference]: With dead ends: 2061 [2021-06-05 18:20:53,506 INFO L226 Difference]: Without dead ends: 1791 [2021-06-05 18:20:53,507 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:20:53,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2021-06-05 18:20:53,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 1428. [2021-06-05 18:20:53,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 2.721093202522775) internal successors, (3883), 1427 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:53,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3883 transitions. [2021-06-05 18:20:53,541 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3883 transitions. Word has length 50 [2021-06-05 18:20:53,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:53,542 INFO L482 AbstractCegarLoop]: Abstraction has 1428 states and 3883 transitions. [2021-06-05 18:20:53,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:53,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3883 transitions. [2021-06-05 18:20:53,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 18:20:53,544 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:53,544 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:53,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 18:20:53,761 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:53,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:53,761 INFO L82 PathProgramCache]: Analyzing trace with hash -128271569, now seen corresponding path program 3 times [2021-06-05 18:20:53,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:53,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919056544] [2021-06-05 18:20:53,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:53,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:53,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:53,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919056544] [2021-06-05 18:20:53,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919056544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:53,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958638477] [2021-06-05 18:20:53,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:53,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 18:20:53,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:53,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 18:20:53,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:54,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:54,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958638477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:54,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:54,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 18:20:54,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522976762] [2021-06-05 18:20:54,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 18:20:54,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:54,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 18:20:54,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:20:54,029 INFO L87 Difference]: Start difference. First operand 1428 states and 3883 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:54,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:54,172 INFO L93 Difference]: Finished difference Result 2006 states and 5197 transitions. [2021-06-05 18:20:54,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 18:20:54,173 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 18:20:54,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:54,176 INFO L225 Difference]: With dead ends: 2006 [2021-06-05 18:20:54,177 INFO L226 Difference]: Without dead ends: 1736 [2021-06-05 18:20:54,177 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:20:54,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2021-06-05 18:20:54,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1428. [2021-06-05 18:20:54,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 2.7245970567624385) internal successors, (3888), 1427 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:54,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3888 transitions. [2021-06-05 18:20:54,200 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3888 transitions. Word has length 50 [2021-06-05 18:20:54,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:54,200 INFO L482 AbstractCegarLoop]: Abstraction has 1428 states and 3888 transitions. [2021-06-05 18:20:54,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:54,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3888 transitions. [2021-06-05 18:20:54,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 18:20:54,202 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:54,202 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:54,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:54,419 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:54,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:54,419 INFO L82 PathProgramCache]: Analyzing trace with hash -186005699, now seen corresponding path program 4 times [2021-06-05 18:20:54,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:54,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435049521] [2021-06-05 18:20:54,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:54,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:54,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:54,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435049521] [2021-06-05 18:20:54,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435049521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:54,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447816855] [2021-06-05 18:20:54,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:54,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:20:54,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:54,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 18:20:54,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:54,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:54,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447816855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:54,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:54,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 18:20:54,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644538460] [2021-06-05 18:20:54,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 18:20:54,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:54,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 18:20:54,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 18:20:54,590 INFO L87 Difference]: Start difference. First operand 1428 states and 3888 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:54,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:54,753 INFO L93 Difference]: Finished difference Result 2798 states and 7421 transitions. [2021-06-05 18:20:54,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 18:20:54,754 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 18:20:54,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:54,758 INFO L225 Difference]: With dead ends: 2798 [2021-06-05 18:20:54,758 INFO L226 Difference]: Without dead ends: 2528 [2021-06-05 18:20:54,758 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:20:54,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2021-06-05 18:20:54,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 1608. [2021-06-05 18:20:54,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 2.7672682016179215) internal successors, (4447), 1607 states have internal predecessors, (4447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:54,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 4447 transitions. [2021-06-05 18:20:54,820 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 4447 transitions. Word has length 50 [2021-06-05 18:20:54,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:54,820 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 4447 transitions. [2021-06-05 18:20:54,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:54,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 4447 transitions. [2021-06-05 18:20:54,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 18:20:54,822 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:54,822 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:55,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:55,041 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:55,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:55,041 INFO L82 PathProgramCache]: Analyzing trace with hash -163662449, now seen corresponding path program 5 times [2021-06-05 18:20:55,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:55,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052032052] [2021-06-05 18:20:55,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:55,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:55,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:55,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:55,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052032052] [2021-06-05 18:20:55,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052032052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:55,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269355571] [2021-06-05 18:20:55,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:55,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 18:20:55,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:55,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 18:20:55,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:55,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:55,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269355571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:55,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:55,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 18:20:55,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517792060] [2021-06-05 18:20:55,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 18:20:55,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:55,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 18:20:55,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:20:55,247 INFO L87 Difference]: Start difference. First operand 1608 states and 4447 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:55,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:55,414 INFO L93 Difference]: Finished difference Result 2285 states and 6121 transitions. [2021-06-05 18:20:55,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 18:20:55,414 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 18:20:55,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:55,416 INFO L225 Difference]: With dead ends: 2285 [2021-06-05 18:20:55,417 INFO L226 Difference]: Without dead ends: 1706 [2021-06-05 18:20:55,417 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 136.4ms TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:20:55,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2021-06-05 18:20:55,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1313. [2021-06-05 18:20:55,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1312 states have (on average 2.7271341463414633) internal successors, (3578), 1312 states have internal predecessors, (3578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:55,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 3578 transitions. [2021-06-05 18:20:55,436 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 3578 transitions. Word has length 50 [2021-06-05 18:20:55,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:55,436 INFO L482 AbstractCegarLoop]: Abstraction has 1313 states and 3578 transitions. [2021-06-05 18:20:55,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:55,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 3578 transitions. [2021-06-05 18:20:55,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:20:55,438 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:55,438 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:55,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 18:20:55,649 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:55,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:55,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1043607760, now seen corresponding path program 6 times [2021-06-05 18:20:55,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:55,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862322297] [2021-06-05 18:20:55,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:55,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:55,702 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:55,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:55,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862322297] [2021-06-05 18:20:55,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862322297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:55,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896869782] [2021-06-05 18:20:55,702 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:55,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 18:20:55,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:55,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 18:20:55,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:55,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:55,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896869782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:55,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:55,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 18:20:55,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799457854] [2021-06-05 18:20:55,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 18:20:55,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:55,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 18:20:55,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 18:20:55,842 INFO L87 Difference]: Start difference. First operand 1313 states and 3578 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:55,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:55,973 INFO L93 Difference]: Finished difference Result 1931 states and 5017 transitions. [2021-06-05 18:20:55,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 18:20:55,974 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 18:20:55,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:55,976 INFO L225 Difference]: With dead ends: 1931 [2021-06-05 18:20:55,976 INFO L226 Difference]: Without dead ends: 1661 [2021-06-05 18:20:55,978 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:20:55,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-06-05 18:20:55,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1388. [2021-06-05 18:20:55,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 2.741888968997837) internal successors, (3803), 1387 states have internal predecessors, (3803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:56,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 3803 transitions. [2021-06-05 18:20:56,001 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 3803 transitions. Word has length 55 [2021-06-05 18:20:56,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:56,001 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 3803 transitions. [2021-06-05 18:20:56,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:56,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 3803 transitions. [2021-06-05 18:20:56,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:20:56,003 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:56,003 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:56,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 18:20:56,217 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:56,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:56,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1473361344, now seen corresponding path program 7 times [2021-06-05 18:20:56,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:56,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277979502] [2021-06-05 18:20:56,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:56,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:56,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:56,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277979502] [2021-06-05 18:20:56,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277979502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:56,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022469709] [2021-06-05 18:20:56,274 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:56,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:56,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 18:20:56,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:56,449 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:56,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022469709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:56,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:56,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 18:20:56,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571149245] [2021-06-05 18:20:56,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:20:56,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:56,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:20:56,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:20:56,470 INFO L87 Difference]: Start difference. First operand 1388 states and 3803 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:56,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:56,686 INFO L93 Difference]: Finished difference Result 2111 states and 5497 transitions. [2021-06-05 18:20:56,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:20:56,686 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 18:20:56,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:56,689 INFO L225 Difference]: With dead ends: 2111 [2021-06-05 18:20:56,690 INFO L226 Difference]: Without dead ends: 1841 [2021-06-05 18:20:56,690 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 165.3ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:20:56,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2021-06-05 18:20:56,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1463. [2021-06-05 18:20:56,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1462 states have (on average 2.7688098495212037) internal successors, (4048), 1462 states have internal predecessors, (4048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:56,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 4048 transitions. [2021-06-05 18:20:56,718 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 4048 transitions. Word has length 55 [2021-06-05 18:20:56,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:56,718 INFO L482 AbstractCegarLoop]: Abstraction has 1463 states and 4048 transitions. [2021-06-05 18:20:56,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:56,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 4048 transitions. [2021-06-05 18:20:56,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:20:56,720 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:56,720 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:56,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 18:20:56,933 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:56,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:56,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1415627214, now seen corresponding path program 8 times [2021-06-05 18:20:56,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:56,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048689008] [2021-06-05 18:20:56,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:56,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:56,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:56,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:56,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048689008] [2021-06-05 18:20:56,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048689008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:56,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762794786] [2021-06-05 18:20:56,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:57,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:20:57,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:57,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:20:57,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:57,148 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:57,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762794786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:57,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:57,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 18:20:57,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144915038] [2021-06-05 18:20:57,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 18:20:57,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:57,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 18:20:57,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 18:20:57,150 INFO L87 Difference]: Start difference. First operand 1463 states and 4048 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:57,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:57,348 INFO L93 Difference]: Finished difference Result 2858 states and 7631 transitions. [2021-06-05 18:20:57,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 18:20:57,349 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 18:20:57,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:57,353 INFO L225 Difference]: With dead ends: 2858 [2021-06-05 18:20:57,353 INFO L226 Difference]: Without dead ends: 2588 [2021-06-05 18:20:57,353 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 146.4ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:20:57,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-06-05 18:20:57,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 1643. [2021-06-05 18:20:57,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1642 states have (on average 2.805724725943971) internal successors, (4607), 1642 states have internal predecessors, (4607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:57,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 4607 transitions. [2021-06-05 18:20:57,383 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 4607 transitions. Word has length 55 [2021-06-05 18:20:57,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:57,383 INFO L482 AbstractCegarLoop]: Abstraction has 1643 states and 4607 transitions. [2021-06-05 18:20:57,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:57,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 4607 transitions. [2021-06-05 18:20:57,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:20:57,385 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:57,385 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:57,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 18:20:57,601 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:57,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:57,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1437970464, now seen corresponding path program 9 times [2021-06-05 18:20:57,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:57,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642184655] [2021-06-05 18:20:57,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:57,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:57,650 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:57,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:57,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642184655] [2021-06-05 18:20:57,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642184655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:57,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642417588] [2021-06-05 18:20:57,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:57,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 18:20:57,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:57,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:20:57,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:57,803 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:57,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642417588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:57,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:57,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 18:20:57,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562750653] [2021-06-05 18:20:57,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:20:57,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:57,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:20:57,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:20:57,804 INFO L87 Difference]: Start difference. First operand 1643 states and 4607 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:58,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:58,124 INFO L93 Difference]: Finished difference Result 2726 states and 7296 transitions. [2021-06-05 18:20:58,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:20:58,124 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 18:20:58,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:58,127 INFO L225 Difference]: With dead ends: 2726 [2021-06-05 18:20:58,127 INFO L226 Difference]: Without dead ends: 2151 [2021-06-05 18:20:58,127 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 232.9ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:20:58,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2021-06-05 18:20:58,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 1678. [2021-06-05 18:20:58,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 2.7924865831842576) internal successors, (4683), 1677 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:58,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 4683 transitions. [2021-06-05 18:20:58,148 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 4683 transitions. Word has length 55 [2021-06-05 18:20:58,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:58,148 INFO L482 AbstractCegarLoop]: Abstraction has 1678 states and 4683 transitions. [2021-06-05 18:20:58,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:58,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 4683 transitions. [2021-06-05 18:20:58,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 18:20:58,150 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:58,150 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:58,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 18:20:58,365 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:58,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:58,365 INFO L82 PathProgramCache]: Analyzing trace with hash -173240564, now seen corresponding path program 10 times [2021-06-05 18:20:58,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:58,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273491707] [2021-06-05 18:20:58,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:58,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:58,444 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:58,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:58,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273491707] [2021-06-05 18:20:58,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273491707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:58,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084693795] [2021-06-05 18:20:58,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:58,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:20:58,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:58,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:20:58,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:58,628 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:58,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084693795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:58,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:58,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-05 18:20:58,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185712099] [2021-06-05 18:20:58,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:20:58,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:58,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:20:58,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:20:58,630 INFO L87 Difference]: Start difference. First operand 1678 states and 4683 transitions. Second operand has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:58,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:58,825 INFO L93 Difference]: Finished difference Result 2468 states and 6583 transitions. [2021-06-05 18:20:58,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:20:58,826 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-05 18:20:58,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:58,829 INFO L225 Difference]: With dead ends: 2468 [2021-06-05 18:20:58,829 INFO L226 Difference]: Without dead ends: 2134 [2021-06-05 18:20:58,830 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 168.8ms TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:20:58,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2134 states. [2021-06-05 18:20:58,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2134 to 1763. [2021-06-05 18:20:58,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1762 states have (on average 2.754256526674234) internal successors, (4853), 1762 states have internal predecessors, (4853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:58,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 4853 transitions. [2021-06-05 18:20:58,855 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 4853 transitions. Word has length 60 [2021-06-05 18:20:58,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:58,855 INFO L482 AbstractCegarLoop]: Abstraction has 1763 states and 4853 transitions. [2021-06-05 18:20:58,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:58,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 4853 transitions. [2021-06-05 18:20:58,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 18:20:58,857 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:58,857 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:59,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:59,074 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:59,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:59,074 INFO L82 PathProgramCache]: Analyzing trace with hash -722803536, now seen corresponding path program 11 times [2021-06-05 18:20:59,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:59,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683986118] [2021-06-05 18:20:59,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:59,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:59,136 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:59,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:59,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683986118] [2021-06-05 18:20:59,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683986118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:59,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131804253] [2021-06-05 18:20:59,137 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:59,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 18:20:59,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:59,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:20:59,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:59,300 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:59,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131804253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:59,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:59,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 18:20:59,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511378262] [2021-06-05 18:20:59,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:20:59,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:59,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:20:59,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:20:59,302 INFO L87 Difference]: Start difference. First operand 1763 states and 4853 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:59,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:59,426 INFO L93 Difference]: Finished difference Result 2561 states and 6577 transitions. [2021-06-05 18:20:59,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 18:20:59,426 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-05 18:20:59,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:59,430 INFO L225 Difference]: With dead ends: 2561 [2021-06-05 18:20:59,430 INFO L226 Difference]: Without dead ends: 2291 [2021-06-05 18:20:59,430 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 113.2ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:20:59,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2021-06-05 18:20:59,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 1778. [2021-06-05 18:20:59,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 2.7478897017445134) internal successors, (4883), 1777 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:59,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 4883 transitions. [2021-06-05 18:20:59,454 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 4883 transitions. Word has length 60 [2021-06-05 18:20:59,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:59,455 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 4883 transitions. [2021-06-05 18:20:59,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:59,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 4883 transitions. [2021-06-05 18:20:59,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 18:20:59,456 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:59,457 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:59,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:59,670 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:59,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:59,670 INFO L82 PathProgramCache]: Analyzing trace with hash -790954592, now seen corresponding path program 12 times [2021-06-05 18:20:59,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:59,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083203064] [2021-06-05 18:20:59,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:59,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:59,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083203064] [2021-06-05 18:20:59,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083203064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:59,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957153770] [2021-06-05 18:20:59,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:59,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 18:20:59,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:59,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:20:59,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:59,917 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:59,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957153770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:59,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:59,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 18:20:59,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116510364] [2021-06-05 18:20:59,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:20:59,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:59,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:20:59,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:20:59,919 INFO L87 Difference]: Start difference. First operand 1778 states and 4883 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:00,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:00,102 INFO L93 Difference]: Finished difference Result 2446 states and 6347 transitions. [2021-06-05 18:21:00,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:21:00,103 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-05 18:21:00,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:00,105 INFO L225 Difference]: With dead ends: 2446 [2021-06-05 18:21:00,105 INFO L226 Difference]: Without dead ends: 2176 [2021-06-05 18:21:00,106 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 167.6ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:21:00,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-06-05 18:21:00,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 1778. [2021-06-05 18:21:00,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 2.7478897017445134) internal successors, (4883), 1777 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:00,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 4883 transitions. [2021-06-05 18:21:00,130 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 4883 transitions. Word has length 60 [2021-06-05 18:21:00,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:00,130 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 4883 transitions. [2021-06-05 18:21:00,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:00,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 4883 transitions. [2021-06-05 18:21:00,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 18:21:00,132 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:00,132 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:00,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 18:21:00,350 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:00,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:00,350 INFO L82 PathProgramCache]: Analyzing trace with hash -2087923666, now seen corresponding path program 13 times [2021-06-05 18:21:00,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:00,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721575376] [2021-06-05 18:21:00,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:00,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:00,408 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:00,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:00,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721575376] [2021-06-05 18:21:00,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721575376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:00,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583199718] [2021-06-05 18:21:00,408 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:00,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:00,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:21:00,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:00,537 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:00,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583199718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:00,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:00,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 18:21:00,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628533254] [2021-06-05 18:21:00,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:21:00,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:00,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:21:00,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:21:00,538 INFO L87 Difference]: Start difference. First operand 1778 states and 4883 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:00,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:00,677 INFO L93 Difference]: Finished difference Result 2421 states and 6297 transitions. [2021-06-05 18:21:00,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 18:21:00,678 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-05 18:21:00,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:00,680 INFO L225 Difference]: With dead ends: 2421 [2021-06-05 18:21:00,680 INFO L226 Difference]: Without dead ends: 2151 [2021-06-05 18:21:00,680 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:21:00,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2021-06-05 18:21:00,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 1778. [2021-06-05 18:21:00,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 2.7478897017445134) internal successors, (4883), 1777 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:00,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 4883 transitions. [2021-06-05 18:21:00,702 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 4883 transitions. Word has length 60 [2021-06-05 18:21:00,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:00,702 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 4883 transitions. [2021-06-05 18:21:00,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:00,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 4883 transitions. [2021-06-05 18:21:00,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 18:21:00,704 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:00,704 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:00,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:00,919 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:00,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:00,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1658170082, now seen corresponding path program 14 times [2021-06-05 18:21:00,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:00,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74318183] [2021-06-05 18:21:00,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:00,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:00,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:00,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74318183] [2021-06-05 18:21:00,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74318183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:00,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474551867] [2021-06-05 18:21:00,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:01,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:21:01,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:01,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:21:01,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:01,160 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:01,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474551867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:01,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:01,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 18:21:01,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875866246] [2021-06-05 18:21:01,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:21:01,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:01,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:21:01,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:21:01,161 INFO L87 Difference]: Start difference. First operand 1778 states and 4883 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:01,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:01,376 INFO L93 Difference]: Finished difference Result 2431 states and 6347 transitions. [2021-06-05 18:21:01,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:21:01,385 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-05 18:21:01,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:01,387 INFO L225 Difference]: With dead ends: 2431 [2021-06-05 18:21:01,387 INFO L226 Difference]: Without dead ends: 2161 [2021-06-05 18:21:01,387 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 190.7ms TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:21:01,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2021-06-05 18:21:01,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 1778. [2021-06-05 18:21:01,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 2.7507034327518287) internal successors, (4888), 1777 states have internal predecessors, (4888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:01,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 4888 transitions. [2021-06-05 18:21:01,410 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 4888 transitions. Word has length 60 [2021-06-05 18:21:01,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:01,410 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 4888 transitions. [2021-06-05 18:21:01,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:01,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 4888 transitions. [2021-06-05 18:21:01,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 18:21:01,412 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:01,412 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:01,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 18:21:01,630 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:01,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:01,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1715904212, now seen corresponding path program 15 times [2021-06-05 18:21:01,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:01,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401766362] [2021-06-05 18:21:01,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:01,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:01,696 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:01,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:01,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401766362] [2021-06-05 18:21:01,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401766362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:01,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850253473] [2021-06-05 18:21:01,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:01,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 18:21:01,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:01,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:21:01,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:01,835 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:01,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850253473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:01,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:01,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 18:21:01,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833371620] [2021-06-05 18:21:01,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:21:01,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:01,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:21:01,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:21:01,836 INFO L87 Difference]: Start difference. First operand 1778 states and 4888 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:02,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:02,028 INFO L93 Difference]: Finished difference Result 3198 states and 8521 transitions. [2021-06-05 18:21:02,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 18:21:02,028 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-05 18:21:02,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:02,031 INFO L225 Difference]: With dead ends: 3198 [2021-06-05 18:21:02,031 INFO L226 Difference]: Without dead ends: 2928 [2021-06-05 18:21:02,032 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 144.3ms TimeCoverageRelationStatistics Valid=164, Invalid=436, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:21:02,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2928 states. [2021-06-05 18:21:02,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2928 to 1958. [2021-06-05 18:21:02,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1957 states have (on average 2.783341849770056) internal successors, (5447), 1957 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:02,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 5447 transitions. [2021-06-05 18:21:02,058 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 5447 transitions. Word has length 60 [2021-06-05 18:21:02,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:02,058 INFO L482 AbstractCegarLoop]: Abstraction has 1958 states and 5447 transitions. [2021-06-05 18:21:02,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:02,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 5447 transitions. [2021-06-05 18:21:02,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 18:21:02,061 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:02,061 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:02,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 18:21:02,277 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:02,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:02,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1693560962, now seen corresponding path program 16 times [2021-06-05 18:21:02,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:02,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981693571] [2021-06-05 18:21:02,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:02,337 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:02,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:02,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981693571] [2021-06-05 18:21:02,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981693571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:02,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19202207] [2021-06-05 18:21:02,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:02,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:21:02,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:02,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:21:02,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:02,476 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:02,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19202207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:02,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:02,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 18:21:02,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258700445] [2021-06-05 18:21:02,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:21:02,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:02,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:21:02,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:21:02,477 INFO L87 Difference]: Start difference. First operand 1958 states and 5447 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:02,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:02,788 INFO L93 Difference]: Finished difference Result 3021 states and 8021 transitions. [2021-06-05 18:21:02,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:21:02,788 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-05 18:21:02,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:02,791 INFO L225 Difference]: With dead ends: 3021 [2021-06-05 18:21:02,791 INFO L226 Difference]: Without dead ends: 2446 [2021-06-05 18:21:02,791 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 275.5ms TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:21:02,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2021-06-05 18:21:02,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 1603. [2021-06-05 18:21:02,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 2.7265917602996255) internal successors, (4368), 1602 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:02,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 4368 transitions. [2021-06-05 18:21:02,823 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 4368 transitions. Word has length 60 [2021-06-05 18:21:02,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:02,824 INFO L482 AbstractCegarLoop]: Abstraction has 1603 states and 4368 transitions. [2021-06-05 18:21:02,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:02,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 4368 transitions. [2021-06-05 18:21:02,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:21:02,830 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:02,830 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:03,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 18:21:03,045 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:03,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:03,045 INFO L82 PathProgramCache]: Analyzing trace with hash -2063950335, now seen corresponding path program 17 times [2021-06-05 18:21:03,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:03,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102501045] [2021-06-05 18:21:03,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:03,130 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:03,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:03,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102501045] [2021-06-05 18:21:03,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102501045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:03,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682327058] [2021-06-05 18:21:03,131 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:03,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 18:21:03,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:03,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:21:03,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:03,295 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:03,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682327058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:03,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:03,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 18:21:03,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814062872] [2021-06-05 18:21:03,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:21:03,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:03,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:21:03,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:21:03,297 INFO L87 Difference]: Start difference. First operand 1603 states and 4368 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:03,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:03,452 INFO L93 Difference]: Finished difference Result 2321 states and 6007 transitions. [2021-06-05 18:21:03,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:21:03,453 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 18:21:03,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:03,455 INFO L225 Difference]: With dead ends: 2321 [2021-06-05 18:21:03,455 INFO L226 Difference]: Without dead ends: 2051 [2021-06-05 18:21:03,456 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 143.5ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:21:03,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-06-05 18:21:03,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1678. [2021-06-05 18:21:03,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 2.738819320214669) internal successors, (4593), 1677 states have internal predecessors, (4593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:03,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 4593 transitions. [2021-06-05 18:21:03,479 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 4593 transitions. Word has length 65 [2021-06-05 18:21:03,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:03,479 INFO L482 AbstractCegarLoop]: Abstraction has 1678 states and 4593 transitions. [2021-06-05 18:21:03,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:03,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 4593 transitions. [2021-06-05 18:21:03,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:21:03,481 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:03,481 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:03,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 18:21:03,697 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:03,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:03,697 INFO L82 PathProgramCache]: Analyzing trace with hash -2132101391, now seen corresponding path program 18 times [2021-06-05 18:21:03,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:03,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101796699] [2021-06-05 18:21:03,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:03,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:03,770 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:03,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:03,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101796699] [2021-06-05 18:21:03,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101796699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:03,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629351313] [2021-06-05 18:21:03,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:03,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 18:21:03,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:03,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:21:03,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:03,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629351313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:03,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:03,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 18:21:03,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265223792] [2021-06-05 18:21:03,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:21:03,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:03,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:21:03,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:21:03,962 INFO L87 Difference]: Start difference. First operand 1678 states and 4593 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:04,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:04,168 INFO L93 Difference]: Finished difference Result 2491 states and 6422 transitions. [2021-06-05 18:21:04,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:21:04,168 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 18:21:04,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:04,171 INFO L225 Difference]: With dead ends: 2491 [2021-06-05 18:21:04,171 INFO L226 Difference]: Without dead ends: 2221 [2021-06-05 18:21:04,171 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 193.2ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:21:04,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2221 states. [2021-06-05 18:21:04,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2221 to 1753. [2021-06-05 18:21:04,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1752 states have (on average 2.75) internal successors, (4818), 1752 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:04,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 4818 transitions. [2021-06-05 18:21:04,241 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 4818 transitions. Word has length 65 [2021-06-05 18:21:04,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:04,241 INFO L482 AbstractCegarLoop]: Abstraction has 1753 states and 4818 transitions. [2021-06-05 18:21:04,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:04,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 4818 transitions. [2021-06-05 18:21:04,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:21:04,244 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:04,244 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:04,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 18:21:04,457 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:04,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:04,457 INFO L82 PathProgramCache]: Analyzing trace with hash 865896831, now seen corresponding path program 19 times [2021-06-05 18:21:04,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:04,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742514969] [2021-06-05 18:21:04,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:04,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:04,530 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:04,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:04,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742514969] [2021-06-05 18:21:04,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742514969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:04,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867334996] [2021-06-05 18:21:04,530 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:04,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:04,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:21:04,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:04,694 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:04,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867334996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:04,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:04,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 18:21:04,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959458842] [2021-06-05 18:21:04,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:21:04,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:04,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:21:04,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:21:04,695 INFO L87 Difference]: Start difference. First operand 1753 states and 4818 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:04,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:04,915 INFO L93 Difference]: Finished difference Result 2566 states and 6677 transitions. [2021-06-05 18:21:04,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:21:04,916 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 18:21:04,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:04,918 INFO L225 Difference]: With dead ends: 2566 [2021-06-05 18:21:04,918 INFO L226 Difference]: Without dead ends: 2296 [2021-06-05 18:21:04,918 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 189.9ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:21:04,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-06-05 18:21:04,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1828. [2021-06-05 18:21:04,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1828 states, 1827 states have (on average 2.768472906403941) internal successors, (5058), 1827 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:04,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 5058 transitions. [2021-06-05 18:21:04,943 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 5058 transitions. Word has length 65 [2021-06-05 18:21:04,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:04,943 INFO L482 AbstractCegarLoop]: Abstraction has 1828 states and 5058 transitions. [2021-06-05 18:21:04,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:04,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 5058 transitions. [2021-06-05 18:21:04,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:21:04,945 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:04,945 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:05,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:05,161 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:05,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:05,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1295650415, now seen corresponding path program 20 times [2021-06-05 18:21:05,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:05,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560825256] [2021-06-05 18:21:05,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:05,223 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:05,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:05,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560825256] [2021-06-05 18:21:05,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560825256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:05,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856342984] [2021-06-05 18:21:05,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:05,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:21:05,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:05,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:21:05,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:05,436 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:05,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856342984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:05,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:05,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 18:21:05,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432117508] [2021-06-05 18:21:05,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:21:05,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:05,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:21:05,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:21:05,437 INFO L87 Difference]: Start difference. First operand 1828 states and 5058 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:05,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:05,713 INFO L93 Difference]: Finished difference Result 3144 states and 8303 transitions. [2021-06-05 18:21:05,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:21:05,713 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 18:21:05,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:05,716 INFO L225 Difference]: With dead ends: 3144 [2021-06-05 18:21:05,716 INFO L226 Difference]: Without dead ends: 2521 [2021-06-05 18:21:05,718 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 236.3ms TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:21:05,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2021-06-05 18:21:05,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 1903. [2021-06-05 18:21:05,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1903 states, 1902 states have (on average 2.780231335436383) internal successors, (5288), 1902 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:05,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 5288 transitions. [2021-06-05 18:21:05,742 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 5288 transitions. Word has length 65 [2021-06-05 18:21:05,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:05,742 INFO L482 AbstractCegarLoop]: Abstraction has 1903 states and 5288 transitions. [2021-06-05 18:21:05,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:05,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 5288 transitions. [2021-06-05 18:21:05,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:21:05,744 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:05,744 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:05,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 18:21:05,953 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:05,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:05,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1237916285, now seen corresponding path program 21 times [2021-06-05 18:21:05,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:05,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915163195] [2021-06-05 18:21:05,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:05,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:06,009 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:06,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:06,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915163195] [2021-06-05 18:21:06,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915163195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:06,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459967670] [2021-06-05 18:21:06,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:06,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 18:21:06,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:06,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:21:06,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:06,214 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:06,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459967670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:06,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:06,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 18:21:06,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366268179] [2021-06-05 18:21:06,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:21:06,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:06,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:21:06,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:21:06,216 INFO L87 Difference]: Start difference. First operand 1903 states and 5288 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:06,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:06,408 INFO L93 Difference]: Finished difference Result 3348 states and 8971 transitions. [2021-06-05 18:21:06,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:21:06,409 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 18:21:06,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:06,412 INFO L225 Difference]: With dead ends: 3348 [2021-06-05 18:21:06,412 INFO L226 Difference]: Without dead ends: 3078 [2021-06-05 18:21:06,412 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 162.5ms TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:21:06,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2021-06-05 18:21:06,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 2083. [2021-06-05 18:21:06,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 2.80835734870317) internal successors, (5847), 2082 states have internal predecessors, (5847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:06,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 5847 transitions. [2021-06-05 18:21:06,440 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 5847 transitions. Word has length 65 [2021-06-05 18:21:06,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:06,440 INFO L482 AbstractCegarLoop]: Abstraction has 2083 states and 5847 transitions. [2021-06-05 18:21:06,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:06,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 5847 transitions. [2021-06-05 18:21:06,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:21:06,442 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:06,442 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:06,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:06,657 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:06,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:06,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1260259535, now seen corresponding path program 22 times [2021-06-05 18:21:06,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:06,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072185017] [2021-06-05 18:21:06,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:06,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:06,729 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:06,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:06,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072185017] [2021-06-05 18:21:06,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072185017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:06,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187820511] [2021-06-05 18:21:06,729 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:06,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:21:06,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:06,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:21:06,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:06,861 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:06,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187820511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:06,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:06,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 18:21:06,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702648599] [2021-06-05 18:21:06,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:21:06,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:06,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:21:06,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:21:06,862 INFO L87 Difference]: Start difference. First operand 2083 states and 5847 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:07,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:07,226 INFO L93 Difference]: Finished difference Result 3216 states and 8636 transitions. [2021-06-05 18:21:07,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:21:07,226 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 18:21:07,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:07,229 INFO L225 Difference]: With dead ends: 3216 [2021-06-05 18:21:07,229 INFO L226 Difference]: Without dead ends: 2641 [2021-06-05 18:21:07,229 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 303.7ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:21:07,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2641 states. [2021-06-05 18:21:07,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2641 to 1524. [2021-06-05 18:21:07,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1524 states, 1523 states have (on average 2.7288246881155613) internal successors, (4156), 1523 states have internal predecessors, (4156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:07,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 4156 transitions. [2021-06-05 18:21:07,249 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 4156 transitions. Word has length 65 [2021-06-05 18:21:07,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:07,249 INFO L482 AbstractCegarLoop]: Abstraction has 1524 states and 4156 transitions. [2021-06-05 18:21:07,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:07,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 4156 transitions. [2021-06-05 18:21:07,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:21:07,250 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:07,251 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:07,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 18:21:07,465 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:07,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:07,465 INFO L82 PathProgramCache]: Analyzing trace with hash 632250685, now seen corresponding path program 23 times [2021-06-05 18:21:07,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:07,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958599816] [2021-06-05 18:21:07,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:07,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:07,699 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:07,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:07,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958599816] [2021-06-05 18:21:07,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958599816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:07,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893298241] [2021-06-05 18:21:07,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:07,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 18:21:07,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:07,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:21:07,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:07,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893298241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:07,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:07,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2021-06-05 18:21:07,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944438259] [2021-06-05 18:21:07,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:21:07,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:07,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:21:07,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:21:07,978 INFO L87 Difference]: Start difference. First operand 1524 states and 4156 transitions. Second operand has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:08,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:08,202 INFO L93 Difference]: Finished difference Result 2364 states and 6156 transitions. [2021-06-05 18:21:08,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:21:08,202 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-05 18:21:08,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:08,204 INFO L225 Difference]: With dead ends: 2364 [2021-06-05 18:21:08,204 INFO L226 Difference]: Without dead ends: 2030 [2021-06-05 18:21:08,206 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 290.0ms TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:21:08,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2030 states. [2021-06-05 18:21:08,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2030 to 1609. [2021-06-05 18:21:08,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1608 states have (on average 2.6902985074626864) internal successors, (4326), 1608 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:08,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 4326 transitions. [2021-06-05 18:21:08,245 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 4326 transitions. Word has length 70 [2021-06-05 18:21:08,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:08,245 INFO L482 AbstractCegarLoop]: Abstraction has 1609 states and 4326 transitions. [2021-06-05 18:21:08,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:08,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 4326 transitions. [2021-06-05 18:21:08,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:21:08,247 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:08,247 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:08,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:08,462 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:08,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:08,463 INFO L82 PathProgramCache]: Analyzing trace with hash -515245599, now seen corresponding path program 24 times [2021-06-05 18:21:08,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:08,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961035358] [2021-06-05 18:21:08,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:08,580 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:08,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:08,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961035358] [2021-06-05 18:21:08,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961035358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:08,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40106294] [2021-06-05 18:21:08,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:08,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 18:21:08,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:08,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:21:08,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:08,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40106294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:08,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:08,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 18:21:08,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952954663] [2021-06-05 18:21:08,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:21:08,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:08,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:21:08,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:21:08,723 INFO L87 Difference]: Start difference. First operand 1609 states and 4326 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:08,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:08,879 INFO L93 Difference]: Finished difference Result 2686 states and 6737 transitions. [2021-06-05 18:21:08,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 18:21:08,879 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-05 18:21:08,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:08,881 INFO L225 Difference]: With dead ends: 2686 [2021-06-05 18:21:08,881 INFO L226 Difference]: Without dead ends: 2416 [2021-06-05 18:21:08,882 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 170.3ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:21:08,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-06-05 18:21:08,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 1753. [2021-06-05 18:21:08,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1752 states have (on average 2.7071917808219177) internal successors, (4743), 1752 states have internal predecessors, (4743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:08,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 4743 transitions. [2021-06-05 18:21:08,902 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 4743 transitions. Word has length 70 [2021-06-05 18:21:08,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:08,903 INFO L482 AbstractCegarLoop]: Abstraction has 1753 states and 4743 transitions. [2021-06-05 18:21:08,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:08,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 4743 transitions. [2021-06-05 18:21:08,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:21:08,904 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:08,904 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:09,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 18:21:09,121 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:09,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:09,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1201428783, now seen corresponding path program 25 times [2021-06-05 18:21:09,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:09,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241230977] [2021-06-05 18:21:09,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:09,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:09,214 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:09,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:09,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241230977] [2021-06-05 18:21:09,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241230977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:09,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852062923] [2021-06-05 18:21:09,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:09,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:09,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:21:09,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:09,366 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:09,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852062923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:09,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:09,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 18:21:09,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901209224] [2021-06-05 18:21:09,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:21:09,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:09,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:21:09,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:21:09,368 INFO L87 Difference]: Start difference. First operand 1753 states and 4743 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:09,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:09,580 INFO L93 Difference]: Finished difference Result 2646 states and 6732 transitions. [2021-06-05 18:21:09,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:21:09,581 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-05 18:21:09,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:09,583 INFO L225 Difference]: With dead ends: 2646 [2021-06-05 18:21:09,583 INFO L226 Difference]: Without dead ends: 2376 [2021-06-05 18:21:09,583 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 222.9ms TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:21:09,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2021-06-05 18:21:09,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 1828. [2021-06-05 18:21:09,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1828 states, 1827 states have (on average 2.7192118226600983) internal successors, (4968), 1827 states have internal predecessors, (4968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:09,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 4968 transitions. [2021-06-05 18:21:09,604 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 4968 transitions. Word has length 70 [2021-06-05 18:21:09,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:09,604 INFO L482 AbstractCegarLoop]: Abstraction has 1828 states and 4968 transitions. [2021-06-05 18:21:09,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:09,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 4968 transitions. [2021-06-05 18:21:09,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:21:09,606 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:09,606 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:09,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:09,822 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:09,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:09,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1286463521, now seen corresponding path program 26 times [2021-06-05 18:21:09,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:09,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173341863] [2021-06-05 18:21:09,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:09,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:09,915 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:09,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:09,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173341863] [2021-06-05 18:21:09,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173341863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:09,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537207202] [2021-06-05 18:21:09,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:09,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:21:09,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:09,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:21:09,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:10,077 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:10,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537207202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:10,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:10,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 18:21:10,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959895138] [2021-06-05 18:21:10,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:21:10,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:10,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:21:10,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:21:10,079 INFO L87 Difference]: Start difference. First operand 1828 states and 4968 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:10,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:10,260 INFO L93 Difference]: Finished difference Result 2696 states and 6907 transitions. [2021-06-05 18:21:10,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 18:21:10,261 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-05 18:21:10,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:10,263 INFO L225 Difference]: With dead ends: 2696 [2021-06-05 18:21:10,263 INFO L226 Difference]: Without dead ends: 2426 [2021-06-05 18:21:10,264 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 175.1ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:21:10,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-06-05 18:21:10,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 1903. [2021-06-05 18:21:10,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1903 states, 1902 states have (on average 2.730283911671924) internal successors, (5193), 1902 states have internal predecessors, (5193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:10,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 5193 transitions. [2021-06-05 18:21:10,286 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 5193 transitions. Word has length 70 [2021-06-05 18:21:10,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:10,287 INFO L482 AbstractCegarLoop]: Abstraction has 1903 states and 5193 transitions. [2021-06-05 18:21:10,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:10,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 5193 transitions. [2021-06-05 18:21:10,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:21:10,289 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:10,289 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:10,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 18:21:10,505 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:10,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:10,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1354614577, now seen corresponding path program 27 times [2021-06-05 18:21:10,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:10,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469505205] [2021-06-05 18:21:10,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:10,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:10,582 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:10,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:10,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469505205] [2021-06-05 18:21:10,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469505205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:10,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235369653] [2021-06-05 18:21:10,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:10,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 18:21:10,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:10,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:21:10,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:10,728 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:10,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235369653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:10,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:10,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 18:21:10,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534121611] [2021-06-05 18:21:10,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:21:10,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:10,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:21:10,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:21:10,729 INFO L87 Difference]: Start difference. First operand 1903 states and 5193 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:10,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:10,943 INFO L93 Difference]: Finished difference Result 2721 states and 7032 transitions. [2021-06-05 18:21:10,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:21:10,943 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-05 18:21:10,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:10,946 INFO L225 Difference]: With dead ends: 2721 [2021-06-05 18:21:10,946 INFO L226 Difference]: Without dead ends: 2451 [2021-06-05 18:21:10,946 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 196.0ms TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:21:10,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-06-05 18:21:10,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1978. [2021-06-05 18:21:10,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 2.74051593323217) internal successors, (5418), 1977 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:10,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 5418 transitions. [2021-06-05 18:21:10,968 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 5418 transitions. Word has length 70 [2021-06-05 18:21:10,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:10,968 INFO L482 AbstractCegarLoop]: Abstraction has 1978 states and 5418 transitions. [2021-06-05 18:21:10,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:10,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 5418 transitions. [2021-06-05 18:21:10,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:21:10,970 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:10,970 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:11,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:11,187 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:11,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:11,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1643383645, now seen corresponding path program 28 times [2021-06-05 18:21:11,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:11,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326414349] [2021-06-05 18:21:11,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:11,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:11,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:11,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326414349] [2021-06-05 18:21:11,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326414349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:11,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650549311] [2021-06-05 18:21:11,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:11,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:21:11,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:11,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:21:11,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:11,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650549311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:11,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:11,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 18:21:11,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100430630] [2021-06-05 18:21:11,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:21:11,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:11,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:21:11,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:21:11,442 INFO L87 Difference]: Start difference. First operand 1978 states and 5418 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:11,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:11,664 INFO L93 Difference]: Finished difference Result 2791 states and 7277 transitions. [2021-06-05 18:21:11,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:21:11,664 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-05 18:21:11,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:11,667 INFO L225 Difference]: With dead ends: 2791 [2021-06-05 18:21:11,667 INFO L226 Difference]: Without dead ends: 2521 [2021-06-05 18:21:11,667 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 191.8ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:21:11,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2021-06-05 18:21:11,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 2053. [2021-06-05 18:21:11,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 2052 states have (on average 2.757309941520468) internal successors, (5658), 2052 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:11,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 5658 transitions. [2021-06-05 18:21:11,695 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 5658 transitions. Word has length 70 [2021-06-05 18:21:11,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:11,695 INFO L482 AbstractCegarLoop]: Abstraction has 2053 states and 5658 transitions. [2021-06-05 18:21:11,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:11,695 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 5658 transitions. [2021-06-05 18:21:11,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:21:11,697 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:11,697 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:11,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 18:21:11,899 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:11,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:11,899 INFO L82 PathProgramCache]: Analyzing trace with hash 2073137229, now seen corresponding path program 29 times [2021-06-05 18:21:11,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:11,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769529414] [2021-06-05 18:21:11,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:11,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:11,983 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:11,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:11,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769529414] [2021-06-05 18:21:11,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769529414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:11,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346443067] [2021-06-05 18:21:11,984 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:12,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 18:21:12,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:12,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:21:12,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:12,136 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:12,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346443067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:12,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:12,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 18:21:12,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351080574] [2021-06-05 18:21:12,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:21:12,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:12,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:21:12,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:21:12,137 INFO L87 Difference]: Start difference. First operand 2053 states and 5658 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:12,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:12,472 INFO L93 Difference]: Finished difference Result 3369 states and 8903 transitions. [2021-06-05 18:21:12,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:21:12,472 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-05 18:21:12,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:12,475 INFO L225 Difference]: With dead ends: 3369 [2021-06-05 18:21:12,475 INFO L226 Difference]: Without dead ends: 2746 [2021-06-05 18:21:12,475 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 295.8ms TimeCoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:21:12,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2021-06-05 18:21:12,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 2128. [2021-06-05 18:21:12,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.768218147625764) internal successors, (5888), 2127 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:12,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5888 transitions. [2021-06-05 18:21:12,498 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5888 transitions. Word has length 70 [2021-06-05 18:21:12,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:12,498 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5888 transitions. [2021-06-05 18:21:12,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:12,498 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5888 transitions. [2021-06-05 18:21:12,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:21:12,500 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:12,500 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:12,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 18:21:12,717 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:12,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:12,717 INFO L82 PathProgramCache]: Analyzing trace with hash 2015403099, now seen corresponding path program 30 times [2021-06-05 18:21:12,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:12,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897709166] [2021-06-05 18:21:12,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:12,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:12,783 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:12,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:12,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897709166] [2021-06-05 18:21:12,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897709166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:12,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392826679] [2021-06-05 18:21:12,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:12,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 18:21:12,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:12,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:21:12,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:12,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392826679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:12,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:12,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 18:21:12,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767857123] [2021-06-05 18:21:12,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:21:12,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:12,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:21:12,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:21:12,942 INFO L87 Difference]: Start difference. First operand 2128 states and 5888 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:13,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:13,160 INFO L93 Difference]: Finished difference Result 3598 states and 9621 transitions. [2021-06-05 18:21:13,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:21:13,161 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-05 18:21:13,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:13,164 INFO L225 Difference]: With dead ends: 3598 [2021-06-05 18:21:13,164 INFO L226 Difference]: Without dead ends: 3328 [2021-06-05 18:21:13,164 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 188.2ms TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:21:13,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2021-06-05 18:21:13,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 2308. [2021-06-05 18:21:13,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2308 states, 2307 states have (on average 2.7945383615084527) internal successors, (6447), 2307 states have internal predecessors, (6447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:13,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2308 states to 2308 states and 6447 transitions. [2021-06-05 18:21:13,189 INFO L78 Accepts]: Start accepts. Automaton has 2308 states and 6447 transitions. Word has length 70 [2021-06-05 18:21:13,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:13,189 INFO L482 AbstractCegarLoop]: Abstraction has 2308 states and 6447 transitions. [2021-06-05 18:21:13,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:13,189 INFO L276 IsEmpty]: Start isEmpty. Operand 2308 states and 6447 transitions. [2021-06-05 18:21:13,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:21:13,211 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:13,211 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:13,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 18:21:13,425 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:13,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:13,425 INFO L82 PathProgramCache]: Analyzing trace with hash 2037746349, now seen corresponding path program 31 times [2021-06-05 18:21:13,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:13,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282211505] [2021-06-05 18:21:13,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:13,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:13,491 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:13,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:13,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282211505] [2021-06-05 18:21:13,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282211505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:13,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219619870] [2021-06-05 18:21:13,491 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:13,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:13,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:21:13,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:13,642 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:13,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219619870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:13,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:13,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 18:21:13,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352790604] [2021-06-05 18:21:13,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:21:13,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:13,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:21:13,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:21:13,643 INFO L87 Difference]: Start difference. First operand 2308 states and 6447 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:14,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:14,010 INFO L93 Difference]: Finished difference Result 3421 states and 9121 transitions. [2021-06-05 18:21:14,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:21:14,010 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-05 18:21:14,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:14,013 INFO L225 Difference]: With dead ends: 3421 [2021-06-05 18:21:14,013 INFO L226 Difference]: Without dead ends: 2846 [2021-06-05 18:21:14,013 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 321.1ms TimeCoverageRelationStatistics Valid=357, Invalid=1049, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:21:14,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2021-06-05 18:21:14,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 1803. [2021-06-05 18:21:14,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1802 states have (on average 2.7291897891231964) internal successors, (4918), 1802 states have internal predecessors, (4918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:14,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 4918 transitions. [2021-06-05 18:21:14,033 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 4918 transitions. Word has length 70 [2021-06-05 18:21:14,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:14,033 INFO L482 AbstractCegarLoop]: Abstraction has 1803 states and 4918 transitions. [2021-06-05 18:21:14,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:14,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 4918 transitions. [2021-06-05 18:21:14,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:21:14,034 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:14,034 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:14,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 18:21:14,235 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:14,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:14,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1814233586, now seen corresponding path program 32 times [2021-06-05 18:21:14,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:14,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994016393] [2021-06-05 18:21:14,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:14,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:14,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:14,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994016393] [2021-06-05 18:21:14,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994016393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:14,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151229500] [2021-06-05 18:21:14,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:14,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:21:14,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:14,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:21:14,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:14,466 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:14,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151229500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:14,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:14,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 18:21:14,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622390114] [2021-06-05 18:21:14,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:21:14,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:14,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:21:14,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:21:14,467 INFO L87 Difference]: Start difference. First operand 1803 states and 4918 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:14,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:14,662 INFO L93 Difference]: Finished difference Result 2621 states and 6757 transitions. [2021-06-05 18:21:14,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:21:14,662 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-05 18:21:14,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:14,665 INFO L225 Difference]: With dead ends: 2621 [2021-06-05 18:21:14,665 INFO L226 Difference]: Without dead ends: 2351 [2021-06-05 18:21:14,665 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 168.7ms TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:21:14,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-06-05 18:21:14,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1878. [2021-06-05 18:21:14,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1877 states have (on average 2.7400106553010124) internal successors, (5143), 1877 states have internal predecessors, (5143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:14,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 5143 transitions. [2021-06-05 18:21:14,685 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 5143 transitions. Word has length 75 [2021-06-05 18:21:14,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:14,685 INFO L482 AbstractCegarLoop]: Abstraction has 1878 states and 5143 transitions. [2021-06-05 18:21:14,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:14,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 5143 transitions. [2021-06-05 18:21:14,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:21:14,686 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:14,687 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:14,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:14,905 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:14,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:14,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1128050402, now seen corresponding path program 33 times [2021-06-05 18:21:14,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:14,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872372663] [2021-06-05 18:21:14,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:14,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:15,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:15,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872372663] [2021-06-05 18:21:15,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872372663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:15,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218906866] [2021-06-05 18:21:15,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:15,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 18:21:15,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:15,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:21:15,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:15,205 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:15,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218906866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:15,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:15,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 18:21:15,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002358989] [2021-06-05 18:21:15,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:21:15,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:15,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:21:15,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:21:15,206 INFO L87 Difference]: Start difference. First operand 1878 states and 5143 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:15,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:15,439 INFO L93 Difference]: Finished difference Result 2841 states and 7272 transitions. [2021-06-05 18:21:15,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:21:15,440 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-05 18:21:15,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:15,442 INFO L225 Difference]: With dead ends: 2841 [2021-06-05 18:21:15,442 INFO L226 Difference]: Without dead ends: 2571 [2021-06-05 18:21:15,442 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 235.2ms TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:21:15,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-06-05 18:21:15,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 1953. [2021-06-05 18:21:15,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 2.75) internal successors, (5368), 1952 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:15,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 5368 transitions. [2021-06-05 18:21:15,462 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 5368 transitions. Word has length 75 [2021-06-05 18:21:15,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:15,462 INFO L482 AbstractCegarLoop]: Abstraction has 1953 states and 5368 transitions. [2021-06-05 18:21:15,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:15,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 5368 transitions. [2021-06-05 18:21:15,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:21:15,464 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:15,464 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:15,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 18:21:15,665 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:15,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:15,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1043015664, now seen corresponding path program 34 times [2021-06-05 18:21:15,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:15,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211973106] [2021-06-05 18:21:15,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:15,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:15,741 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:15,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:15,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211973106] [2021-06-05 18:21:15,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211973106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:15,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588324462] [2021-06-05 18:21:15,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:15,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:21:15,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:15,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:21:15,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:15,894 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:15,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588324462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:15,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:15,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 18:21:15,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191803873] [2021-06-05 18:21:15,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:21:15,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:15,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:21:15,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:21:15,895 INFO L87 Difference]: Start difference. First operand 1953 states and 5368 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:16,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:16,120 INFO L93 Difference]: Finished difference Result 2871 states and 7407 transitions. [2021-06-05 18:21:16,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:21:16,120 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-05 18:21:16,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:16,123 INFO L225 Difference]: With dead ends: 2871 [2021-06-05 18:21:16,123 INFO L226 Difference]: Without dead ends: 2601 [2021-06-05 18:21:16,123 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 191.3ms TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:21:16,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-06-05 18:21:16,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2028. [2021-06-05 18:21:16,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.759250123334978) internal successors, (5593), 2027 states have internal predecessors, (5593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:16,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5593 transitions. [2021-06-05 18:21:16,143 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5593 transitions. Word has length 75 [2021-06-05 18:21:16,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:16,144 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5593 transitions. [2021-06-05 18:21:16,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:16,144 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5593 transitions. [2021-06-05 18:21:16,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:21:16,146 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:16,146 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:16,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 18:21:16,347 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:16,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:16,347 INFO L82 PathProgramCache]: Analyzing trace with hash 974864608, now seen corresponding path program 35 times [2021-06-05 18:21:16,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:16,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597378526] [2021-06-05 18:21:16,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:16,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:16,435 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:16,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:16,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597378526] [2021-06-05 18:21:16,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597378526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:16,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138208693] [2021-06-05 18:21:16,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:16,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 18:21:16,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:16,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:21:16,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:16,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138208693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:16,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:16,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 18:21:16,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468583608] [2021-06-05 18:21:16,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:21:16,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:16,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:21:16,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:21:16,586 INFO L87 Difference]: Start difference. First operand 2028 states and 5593 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:16,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:16,855 INFO L93 Difference]: Finished difference Result 2896 states and 7532 transitions. [2021-06-05 18:21:16,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:21:16,855 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-05 18:21:16,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:16,858 INFO L225 Difference]: With dead ends: 2896 [2021-06-05 18:21:16,858 INFO L226 Difference]: Without dead ends: 2626 [2021-06-05 18:21:16,858 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 243.9ms TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:21:16,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-06-05 18:21:16,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 2103. [2021-06-05 18:21:16,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2103 states, 2102 states have (on average 2.7678401522359657) internal successors, (5818), 2102 states have internal predecessors, (5818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:16,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 5818 transitions. [2021-06-05 18:21:16,879 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 5818 transitions. Word has length 75 [2021-06-05 18:21:16,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:16,879 INFO L482 AbstractCegarLoop]: Abstraction has 2103 states and 5818 transitions. [2021-06-05 18:21:16,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:16,879 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 5818 transitions. [2021-06-05 18:21:16,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:21:16,881 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:16,881 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:17,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:17,082 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:17,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:17,082 INFO L82 PathProgramCache]: Analyzing trace with hash -322104466, now seen corresponding path program 36 times [2021-06-05 18:21:17,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:17,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804976880] [2021-06-05 18:21:17,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:17,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:17,162 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:17,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:17,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804976880] [2021-06-05 18:21:17,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804976880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:17,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126990305] [2021-06-05 18:21:17,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:17,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 18:21:17,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:17,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:21:17,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:17,311 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:17,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126990305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:17,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:17,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 18:21:17,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535855462] [2021-06-05 18:21:17,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:21:17,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:17,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:21:17,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:21:17,312 INFO L87 Difference]: Start difference. First operand 2103 states and 5818 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:17,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:17,545 INFO L93 Difference]: Finished difference Result 2966 states and 7777 transitions. [2021-06-05 18:21:17,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:21:17,546 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-05 18:21:17,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:17,548 INFO L225 Difference]: With dead ends: 2966 [2021-06-05 18:21:17,548 INFO L226 Difference]: Without dead ends: 2696 [2021-06-05 18:21:17,548 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 206.7ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:21:17,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-06-05 18:21:17,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2178. [2021-06-05 18:21:17,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2178 states, 2177 states have (on average 2.782728525493799) internal successors, (6058), 2177 states have internal predecessors, (6058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:17,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 6058 transitions. [2021-06-05 18:21:17,571 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 6058 transitions. Word has length 75 [2021-06-05 18:21:17,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:17,571 INFO L482 AbstractCegarLoop]: Abstraction has 2178 states and 6058 transitions. [2021-06-05 18:21:17,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:17,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 6058 transitions. [2021-06-05 18:21:17,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:21:17,573 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:17,573 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:17,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 18:21:17,774 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:17,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:17,774 INFO L82 PathProgramCache]: Analyzing trace with hash 107649118, now seen corresponding path program 37 times [2021-06-05 18:21:17,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:17,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326973319] [2021-06-05 18:21:17,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:17,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:17,852 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:17,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:17,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326973319] [2021-06-05 18:21:17,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326973319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:17,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995426409] [2021-06-05 18:21:17,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:17,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:21:17,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:17,997 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:17,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995426409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:17,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:17,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 18:21:17,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960087999] [2021-06-05 18:21:17,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:21:17,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:17,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:21:17,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:21:17,998 INFO L87 Difference]: Start difference. First operand 2178 states and 6058 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:18,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:18,355 INFO L93 Difference]: Finished difference Result 3544 states and 9403 transitions. [2021-06-05 18:21:18,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:21:18,356 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-05 18:21:18,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:18,359 INFO L225 Difference]: With dead ends: 3544 [2021-06-05 18:21:18,359 INFO L226 Difference]: Without dead ends: 2921 [2021-06-05 18:21:18,360 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 302.2ms TimeCoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:21:18,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-06-05 18:21:18,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2253. [2021-06-05 18:21:18,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7921847246891653) internal successors, (6288), 2252 states have internal predecessors, (6288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:18,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6288 transitions. [2021-06-05 18:21:18,386 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6288 transitions. Word has length 75 [2021-06-05 18:21:18,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:18,386 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6288 transitions. [2021-06-05 18:21:18,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:18,386 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6288 transitions. [2021-06-05 18:21:18,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:21:18,389 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:18,389 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:18,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:18,601 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:18,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:18,601 INFO L82 PathProgramCache]: Analyzing trace with hash 49914988, now seen corresponding path program 38 times [2021-06-05 18:21:18,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:18,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882111694] [2021-06-05 18:21:18,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:18,682 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:18,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:18,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882111694] [2021-06-05 18:21:18,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882111694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:18,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274107936] [2021-06-05 18:21:18,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:18,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:21:18,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:18,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:21:18,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:18,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274107936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:18,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:18,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 18:21:18,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838722218] [2021-06-05 18:21:18,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:21:18,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:18,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:21:18,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:21:18,812 INFO L87 Difference]: Start difference. First operand 2253 states and 6288 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:19,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:19,078 INFO L93 Difference]: Finished difference Result 3748 states and 10071 transitions. [2021-06-05 18:21:19,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:21:19,079 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-05 18:21:19,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:19,082 INFO L225 Difference]: With dead ends: 3748 [2021-06-05 18:21:19,082 INFO L226 Difference]: Without dead ends: 3478 [2021-06-05 18:21:19,082 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 233.9ms TimeCoverageRelationStatistics Valid=340, Invalid=850, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:21:19,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2021-06-05 18:21:19,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 2433. [2021-06-05 18:21:19,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2433 states, 2432 states have (on average 2.815378289473684) internal successors, (6847), 2432 states have internal predecessors, (6847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:19,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 6847 transitions. [2021-06-05 18:21:19,108 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 6847 transitions. Word has length 75 [2021-06-05 18:21:19,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:19,108 INFO L482 AbstractCegarLoop]: Abstraction has 2433 states and 6847 transitions. [2021-06-05 18:21:19,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:19,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 6847 transitions. [2021-06-05 18:21:19,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:21:19,110 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:19,110 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:19,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 18:21:19,311 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:19,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:19,311 INFO L82 PathProgramCache]: Analyzing trace with hash 72258238, now seen corresponding path program 39 times [2021-06-05 18:21:19,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:19,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961443447] [2021-06-05 18:21:19,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:19,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:19,378 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:19,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:19,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961443447] [2021-06-05 18:21:19,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961443447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:19,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657173189] [2021-06-05 18:21:19,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:19,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 18:21:19,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:19,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:21:19,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:19,533 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:19,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657173189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:19,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:19,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 18:21:19,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162488297] [2021-06-05 18:21:19,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:21:19,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:19,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:21:19,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:21:19,534 INFO L87 Difference]: Start difference. First operand 2433 states and 6847 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:19,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:19,938 INFO L93 Difference]: Finished difference Result 3616 states and 9736 transitions. [2021-06-05 18:21:19,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:21:19,939 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-05 18:21:19,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:19,942 INFO L225 Difference]: With dead ends: 3616 [2021-06-05 18:21:19,942 INFO L226 Difference]: Without dead ends: 3041 [2021-06-05 18:21:19,942 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 337.4ms TimeCoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:21:19,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2021-06-05 18:21:19,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 1724. [2021-06-05 18:21:19,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1723 states have (on average 2.731282646546721) internal successors, (4706), 1723 states have internal predecessors, (4706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:19,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 4706 transitions. [2021-06-05 18:21:19,963 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 4706 transitions. Word has length 75 [2021-06-05 18:21:19,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:19,963 INFO L482 AbstractCegarLoop]: Abstraction has 1724 states and 4706 transitions. [2021-06-05 18:21:19,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:19,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 4706 transitions. [2021-06-05 18:21:19,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:21:19,964 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:19,965 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:20,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:20,181 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:20,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:20,181 INFO L82 PathProgramCache]: Analyzing trace with hash -711333330, now seen corresponding path program 40 times [2021-06-05 18:21:20,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:20,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606892873] [2021-06-05 18:21:20,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:20,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:20,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:20,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606892873] [2021-06-05 18:21:20,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606892873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:20,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137389914] [2021-06-05 18:21:20,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:20,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:21:20,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:20,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:21:20,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:20,478 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:20,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137389914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:20,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:20,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2021-06-05 18:21:20,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504413272] [2021-06-05 18:21:20,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:21:20,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:20,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:21:20,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:21:20,479 INFO L87 Difference]: Start difference. First operand 1724 states and 4706 transitions. Second operand has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:20,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:20,716 INFO L93 Difference]: Finished difference Result 2614 states and 6806 transitions. [2021-06-05 18:21:20,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:21:20,717 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 18:21:20,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:20,719 INFO L225 Difference]: With dead ends: 2614 [2021-06-05 18:21:20,719 INFO L226 Difference]: Without dead ends: 2280 [2021-06-05 18:21:20,719 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 257.3ms TimeCoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:21:20,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2021-06-05 18:21:20,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 1809. [2021-06-05 18:21:20,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1808 states have (on average 2.6969026548672566) internal successors, (4876), 1808 states have internal predecessors, (4876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:20,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 4876 transitions. [2021-06-05 18:21:20,754 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 4876 transitions. Word has length 80 [2021-06-05 18:21:20,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:20,754 INFO L482 AbstractCegarLoop]: Abstraction has 1809 states and 4876 transitions. [2021-06-05 18:21:20,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:20,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 4876 transitions. [2021-06-05 18:21:20,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:21:20,755 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:20,755 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:20,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 18:21:20,956 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:20,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:20,956 INFO L82 PathProgramCache]: Analyzing trace with hash -2057763374, now seen corresponding path program 41 times [2021-06-05 18:21:20,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:20,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260085962] [2021-06-05 18:21:20,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:21,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:21,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260085962] [2021-06-05 18:21:21,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260085962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:21,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519366012] [2021-06-05 18:21:21,066 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:21,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 18:21:21,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:21,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:21:21,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:21,222 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:21,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519366012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:21,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:21,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 18:21:21,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815698840] [2021-06-05 18:21:21,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:21:21,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:21,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:21:21,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:21:21,224 INFO L87 Difference]: Start difference. First operand 1809 states and 4876 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:21,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:21,388 INFO L93 Difference]: Finished difference Result 3036 states and 7587 transitions. [2021-06-05 18:21:21,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:21:21,389 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 18:21:21,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:21,391 INFO L225 Difference]: With dead ends: 3036 [2021-06-05 18:21:21,391 INFO L226 Difference]: Without dead ends: 2766 [2021-06-05 18:21:21,391 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 195.5ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:21:21,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2021-06-05 18:21:21,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 1953. [2021-06-05 18:21:21,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 2.711577868852459) internal successors, (5293), 1952 states have internal predecessors, (5293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:21,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 5293 transitions. [2021-06-05 18:21:21,411 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 5293 transitions. Word has length 80 [2021-06-05 18:21:21,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:21,411 INFO L482 AbstractCegarLoop]: Abstraction has 1953 states and 5293 transitions. [2021-06-05 18:21:21,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:21,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 5293 transitions. [2021-06-05 18:21:21,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:21:21,413 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:21,413 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:21,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 18:21:21,617 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:21,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:21,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1337149122, now seen corresponding path program 42 times [2021-06-05 18:21:21,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:21,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787746556] [2021-06-05 18:21:21,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:21,717 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:21,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:21,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787746556] [2021-06-05 18:21:21,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787746556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:21,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368757978] [2021-06-05 18:21:21,718 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:21,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 18:21:21,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:21,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:21:21,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:21,900 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:21,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368757978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:21,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:21,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:21:21,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884990681] [2021-06-05 18:21:21,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:21:21,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:21,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:21:21,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:21:21,901 INFO L87 Difference]: Start difference. First operand 1953 states and 5293 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:22,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:22,150 INFO L93 Difference]: Finished difference Result 2996 states and 7582 transitions. [2021-06-05 18:21:22,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:21:22,151 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 18:21:22,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:22,154 INFO L225 Difference]: With dead ends: 2996 [2021-06-05 18:21:22,154 INFO L226 Difference]: Without dead ends: 2726 [2021-06-05 18:21:22,154 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 250.4ms TimeCoverageRelationStatistics Valid=264, Invalid=792, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:21:22,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2021-06-05 18:21:22,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 2028. [2021-06-05 18:21:22,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.7222496299950665) internal successors, (5518), 2027 states have internal predecessors, (5518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:22,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5518 transitions. [2021-06-05 18:21:22,174 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5518 transitions. Word has length 80 [2021-06-05 18:21:22,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:22,174 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5518 transitions. [2021-06-05 18:21:22,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:22,174 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5518 transitions. [2021-06-05 18:21:22,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:21:22,176 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:22,176 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:22,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:22,376 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:22,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:22,377 INFO L82 PathProgramCache]: Analyzing trace with hash 908084816, now seen corresponding path program 43 times [2021-06-05 18:21:22,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:22,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167320635] [2021-06-05 18:21:22,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:22,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:22,467 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:22,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:22,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167320635] [2021-06-05 18:21:22,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167320635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:22,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954257920] [2021-06-05 18:21:22,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:22,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:22,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:21:22,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:22,618 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:22,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954257920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:22,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:22,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 18:21:22,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542364837] [2021-06-05 18:21:22,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:21:22,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:22,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:21:22,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:21:22,619 INFO L87 Difference]: Start difference. First operand 2028 states and 5518 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:22,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:22,819 INFO L93 Difference]: Finished difference Result 3046 states and 7757 transitions. [2021-06-05 18:21:22,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:21:22,820 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 18:21:22,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:22,822 INFO L225 Difference]: With dead ends: 3046 [2021-06-05 18:21:22,822 INFO L226 Difference]: Without dead ends: 2776 [2021-06-05 18:21:22,823 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 201.1ms TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:21:22,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-06-05 18:21:22,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2103. [2021-06-05 18:21:22,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2103 states, 2102 states have (on average 2.7321598477640343) internal successors, (5743), 2102 states have internal predecessors, (5743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:22,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 5743 transitions. [2021-06-05 18:21:22,844 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 5743 transitions. Word has length 80 [2021-06-05 18:21:22,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:22,844 INFO L482 AbstractCegarLoop]: Abstraction has 2103 states and 5743 transitions. [2021-06-05 18:21:22,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:22,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 5743 transitions. [2021-06-05 18:21:22,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:21:22,845 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:22,846 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:23,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 18:21:23,046 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:23,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:23,046 INFO L82 PathProgramCache]: Analyzing trace with hash 221901632, now seen corresponding path program 44 times [2021-06-05 18:21:23,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:23,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455387844] [2021-06-05 18:21:23,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:23,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:23,138 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:23,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:23,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455387844] [2021-06-05 18:21:23,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455387844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:23,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793896812] [2021-06-05 18:21:23,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:23,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:21:23,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:23,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:21:23,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:23,305 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:23,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793896812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:23,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:23,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:21:23,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230364418] [2021-06-05 18:21:23,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:21:23,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:23,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:21:23,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:21:23,306 INFO L87 Difference]: Start difference. First operand 2103 states and 5743 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:23,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:23,579 INFO L93 Difference]: Finished difference Result 3071 states and 7882 transitions. [2021-06-05 18:21:23,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:21:23,579 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 18:21:23,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:23,582 INFO L225 Difference]: With dead ends: 3071 [2021-06-05 18:21:23,582 INFO L226 Difference]: Without dead ends: 2801 [2021-06-05 18:21:23,582 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 273.2ms TimeCoverageRelationStatistics Valid=286, Invalid=904, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:21:23,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2801 states. [2021-06-05 18:21:23,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2801 to 2178. [2021-06-05 18:21:23,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2178 states, 2177 states have (on average 2.7413872301332107) internal successors, (5968), 2177 states have internal predecessors, (5968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:23,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 5968 transitions. [2021-06-05 18:21:23,603 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 5968 transitions. Word has length 80 [2021-06-05 18:21:23,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:23,603 INFO L482 AbstractCegarLoop]: Abstraction has 2178 states and 5968 transitions. [2021-06-05 18:21:23,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:23,604 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 5968 transitions. [2021-06-05 18:21:23,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:21:23,605 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:23,605 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:23,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:23,809 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:23,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:23,809 INFO L82 PathProgramCache]: Analyzing trace with hash 136866894, now seen corresponding path program 45 times [2021-06-05 18:21:23,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:23,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835199288] [2021-06-05 18:21:23,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:23,891 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:23,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:23,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835199288] [2021-06-05 18:21:23,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835199288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:23,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537800482] [2021-06-05 18:21:23,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:23,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 18:21:23,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:23,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:21:23,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:24,046 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:24,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537800482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:24,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:24,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 18:21:24,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326637693] [2021-06-05 18:21:24,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:21:24,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:24,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:21:24,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:21:24,047 INFO L87 Difference]: Start difference. First operand 2178 states and 5968 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:24,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:24,286 INFO L93 Difference]: Finished difference Result 3096 states and 8007 transitions. [2021-06-05 18:21:24,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:21:24,286 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 18:21:24,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:24,289 INFO L225 Difference]: With dead ends: 3096 [2021-06-05 18:21:24,289 INFO L226 Difference]: Without dead ends: 2826 [2021-06-05 18:21:24,289 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 220.8ms TimeCoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:21:24,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2021-06-05 18:21:24,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 2253. [2021-06-05 18:21:24,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.75) internal successors, (6193), 2252 states have internal predecessors, (6193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:24,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6193 transitions. [2021-06-05 18:21:24,311 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6193 transitions. Word has length 80 [2021-06-05 18:21:24,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:24,312 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6193 transitions. [2021-06-05 18:21:24,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:24,312 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6193 transitions. [2021-06-05 18:21:24,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:21:24,313 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:24,313 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:24,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:24,514 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:24,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:24,514 INFO L82 PathProgramCache]: Analyzing trace with hash 68715838, now seen corresponding path program 46 times [2021-06-05 18:21:24,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:24,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109267091] [2021-06-05 18:21:24,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:24,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:24,620 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:24,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:24,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109267091] [2021-06-05 18:21:24,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109267091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:24,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200461999] [2021-06-05 18:21:24,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:24,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:21:24,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:24,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:21:24,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:24,788 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:24,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200461999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:24,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:24,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:21:24,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492052052] [2021-06-05 18:21:24,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:21:24,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:24,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:21:24,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:21:24,789 INFO L87 Difference]: Start difference. First operand 2253 states and 6193 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:25,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:25,101 INFO L93 Difference]: Finished difference Result 3121 states and 8132 transitions. [2021-06-05 18:21:25,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:21:25,102 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 18:21:25,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:25,104 INFO L225 Difference]: With dead ends: 3121 [2021-06-05 18:21:25,104 INFO L226 Difference]: Without dead ends: 2851 [2021-06-05 18:21:25,105 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 316.9ms TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:21:25,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-06-05 18:21:25,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2328. [2021-06-05 18:21:25,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 2.758057584873227) internal successors, (6418), 2327 states have internal predecessors, (6418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:25,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 6418 transitions. [2021-06-05 18:21:25,128 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 6418 transitions. Word has length 80 [2021-06-05 18:21:25,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:25,128 INFO L482 AbstractCegarLoop]: Abstraction has 2328 states and 6418 transitions. [2021-06-05 18:21:25,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:25,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 6418 transitions. [2021-06-05 18:21:25,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:21:25,130 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:25,130 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:25,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 18:21:25,334 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:25,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:25,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1228253236, now seen corresponding path program 47 times [2021-06-05 18:21:25,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:25,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141603345] [2021-06-05 18:21:25,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:25,412 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:25,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:25,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141603345] [2021-06-05 18:21:25,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141603345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:25,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171420301] [2021-06-05 18:21:25,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:25,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 18:21:25,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:25,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:21:25,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:25,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171420301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:25,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:25,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 18:21:25,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17306518] [2021-06-05 18:21:25,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:21:25,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:25,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:21:25,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:21:25,569 INFO L87 Difference]: Start difference. First operand 2328 states and 6418 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:25,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:25,835 INFO L93 Difference]: Finished difference Result 3191 states and 8377 transitions. [2021-06-05 18:21:25,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:21:25,836 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 18:21:25,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:25,838 INFO L225 Difference]: With dead ends: 3191 [2021-06-05 18:21:25,838 INFO L226 Difference]: Without dead ends: 2921 [2021-06-05 18:21:25,839 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 236.4ms TimeCoverageRelationStatistics Valid=305, Invalid=885, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:21:25,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-06-05 18:21:25,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2403. [2021-06-05 18:21:25,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2403 states, 2402 states have (on average 2.7718567860116567) internal successors, (6658), 2402 states have internal predecessors, (6658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:25,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2403 states to 2403 states and 6658 transitions. [2021-06-05 18:21:25,864 INFO L78 Accepts]: Start accepts. Automaton has 2403 states and 6658 transitions. Word has length 80 [2021-06-05 18:21:25,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:25,864 INFO L482 AbstractCegarLoop]: Abstraction has 2403 states and 6658 transitions. [2021-06-05 18:21:25,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:25,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2403 states and 6658 transitions. [2021-06-05 18:21:25,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:21:25,866 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:25,866 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:26,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:26,066 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:26,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:26,066 INFO L82 PathProgramCache]: Analyzing trace with hash -798499652, now seen corresponding path program 48 times [2021-06-05 18:21:26,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:26,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961320049] [2021-06-05 18:21:26,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:26,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:26,146 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:26,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:26,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961320049] [2021-06-05 18:21:26,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961320049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:26,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336893177] [2021-06-05 18:21:26,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:26,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 18:21:26,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:26,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:21:26,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:26,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336893177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:26,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:26,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:21:26,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449568482] [2021-06-05 18:21:26,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:21:26,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:26,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:21:26,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:21:26,335 INFO L87 Difference]: Start difference. First operand 2403 states and 6658 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:26,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:26,718 INFO L93 Difference]: Finished difference Result 3769 states and 10003 transitions. [2021-06-05 18:21:26,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:21:26,718 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 18:21:26,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:26,722 INFO L225 Difference]: With dead ends: 3769 [2021-06-05 18:21:26,722 INFO L226 Difference]: Without dead ends: 3146 [2021-06-05 18:21:26,722 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 352.8ms TimeCoverageRelationStatistics Valid=338, Invalid=1144, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:21:26,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3146 states. [2021-06-05 18:21:26,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3146 to 2478. [2021-06-05 18:21:26,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7807832054905126) internal successors, (6888), 2477 states have internal predecessors, (6888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:26,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6888 transitions. [2021-06-05 18:21:26,745 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6888 transitions. Word has length 80 [2021-06-05 18:21:26,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:26,745 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6888 transitions. [2021-06-05 18:21:26,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:26,745 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6888 transitions. [2021-06-05 18:21:26,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:21:26,747 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:26,747 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:26,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 18:21:26,948 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:26,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:26,948 INFO L82 PathProgramCache]: Analyzing trace with hash -856233782, now seen corresponding path program 49 times [2021-06-05 18:21:26,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:26,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484270615] [2021-06-05 18:21:26,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:26,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:27,031 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:27,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:27,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484270615] [2021-06-05 18:21:27,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484270615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:27,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828959758] [2021-06-05 18:21:27,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:27,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:27,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:21:27,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:27,170 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:27,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828959758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:27,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:27,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 18:21:27,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241354392] [2021-06-05 18:21:27,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:21:27,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:27,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:21:27,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:21:27,171 INFO L87 Difference]: Start difference. First operand 2478 states and 6888 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:27,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:27,460 INFO L93 Difference]: Finished difference Result 3998 states and 10721 transitions. [2021-06-05 18:21:27,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:21:27,460 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 18:21:27,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:27,464 INFO L225 Difference]: With dead ends: 3998 [2021-06-05 18:21:27,464 INFO L226 Difference]: Without dead ends: 3728 [2021-06-05 18:21:27,464 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 262.5ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:21:27,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3728 states. [2021-06-05 18:21:27,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3728 to 2658. [2021-06-05 18:21:27,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2658 states, 2657 states have (on average 2.8027850959729017) internal successors, (7447), 2657 states have internal predecessors, (7447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:27,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2658 states to 2658 states and 7447 transitions. [2021-06-05 18:21:27,493 INFO L78 Accepts]: Start accepts. Automaton has 2658 states and 7447 transitions. Word has length 80 [2021-06-05 18:21:27,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:27,493 INFO L482 AbstractCegarLoop]: Abstraction has 2658 states and 7447 transitions. [2021-06-05 18:21:27,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:27,493 INFO L276 IsEmpty]: Start isEmpty. Operand 2658 states and 7447 transitions. [2021-06-05 18:21:27,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:21:27,495 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:27,495 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:27,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 18:21:27,698 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:27,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:27,698 INFO L82 PathProgramCache]: Analyzing trace with hash -833890532, now seen corresponding path program 50 times [2021-06-05 18:21:27,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:27,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456693407] [2021-06-05 18:21:27,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:27,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:27,829 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:27,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:27,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456693407] [2021-06-05 18:21:27,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456693407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:27,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371856857] [2021-06-05 18:21:27,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:27,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:21:27,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:27,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:21:27,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:27,985 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:27,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371856857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:27,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:27,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:21:27,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317498538] [2021-06-05 18:21:27,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:21:27,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:27,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:21:27,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:21:27,986 INFO L87 Difference]: Start difference. First operand 2658 states and 7447 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:28,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:28,422 INFO L93 Difference]: Finished difference Result 3821 states and 10221 transitions. [2021-06-05 18:21:28,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:21:28,422 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 18:21:28,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:28,426 INFO L225 Difference]: With dead ends: 3821 [2021-06-05 18:21:28,426 INFO L226 Difference]: Without dead ends: 3246 [2021-06-05 18:21:28,426 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 378.3ms TimeCoverageRelationStatistics Valid=405, Invalid=1317, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:21:28,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3246 states. [2021-06-05 18:21:28,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3246 to 2003. [2021-06-05 18:21:28,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2003 states, 2002 states have (on average 2.7312687312687314) internal successors, (5468), 2002 states have internal predecessors, (5468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:28,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 5468 transitions. [2021-06-05 18:21:28,449 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 5468 transitions. Word has length 80 [2021-06-05 18:21:28,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:28,449 INFO L482 AbstractCegarLoop]: Abstraction has 2003 states and 5468 transitions. [2021-06-05 18:21:28,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:28,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 5468 transitions. [2021-06-05 18:21:28,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:21:28,450 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:28,451 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:28,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 18:21:28,652 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:28,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:28,652 INFO L82 PathProgramCache]: Analyzing trace with hash 498592931, now seen corresponding path program 51 times [2021-06-05 18:21:28,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:28,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073060550] [2021-06-05 18:21:28,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:28,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:28,749 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:28,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:28,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073060550] [2021-06-05 18:21:28,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073060550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:28,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049833177] [2021-06-05 18:21:28,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:28,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 18:21:28,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:28,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:21:28,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:28,931 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:28,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049833177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:28,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:28,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 18:21:28,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473767168] [2021-06-05 18:21:28,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:21:28,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:28,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:21:28,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:21:28,932 INFO L87 Difference]: Start difference. First operand 2003 states and 5468 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:29,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:29,145 INFO L93 Difference]: Finished difference Result 2921 states and 7507 transitions. [2021-06-05 18:21:29,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:21:29,146 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-05 18:21:29,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:29,148 INFO L225 Difference]: With dead ends: 2921 [2021-06-05 18:21:29,148 INFO L226 Difference]: Without dead ends: 2651 [2021-06-05 18:21:29,148 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 218.6ms TimeCoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:21:29,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2021-06-05 18:21:29,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2078. [2021-06-05 18:21:29,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2078 states, 2077 states have (on average 2.740972556571979) internal successors, (5693), 2077 states have internal predecessors, (5693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:29,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 5693 transitions. [2021-06-05 18:21:29,169 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 5693 transitions. Word has length 85 [2021-06-05 18:21:29,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:29,169 INFO L482 AbstractCegarLoop]: Abstraction has 2078 states and 5693 transitions. [2021-06-05 18:21:29,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:29,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 5693 transitions. [2021-06-05 18:21:29,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:21:29,170 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:29,170 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:29,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 18:21:29,371 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:29,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:29,371 INFO L82 PathProgramCache]: Analyzing trace with hash -401461869, now seen corresponding path program 52 times [2021-06-05 18:21:29,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:29,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034970087] [2021-06-05 18:21:29,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:29,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:29,476 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:29,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:29,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034970087] [2021-06-05 18:21:29,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034970087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:29,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644677361] [2021-06-05 18:21:29,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:29,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:21:29,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:29,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:21:29,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:29,646 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:29,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644677361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:29,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:29,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:21:29,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927919385] [2021-06-05 18:21:29,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:21:29,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:29,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:21:29,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:21:29,647 INFO L87 Difference]: Start difference. First operand 2078 states and 5693 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:29,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:29,917 INFO L93 Difference]: Finished difference Result 3191 states and 8122 transitions. [2021-06-05 18:21:29,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:21:29,917 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-05 18:21:29,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:29,920 INFO L225 Difference]: With dead ends: 3191 [2021-06-05 18:21:29,920 INFO L226 Difference]: Without dead ends: 2921 [2021-06-05 18:21:29,920 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 281.9ms TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:21:29,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-06-05 18:21:29,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2153. [2021-06-05 18:21:29,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 2.75) internal successors, (5918), 2152 states have internal predecessors, (5918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:29,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 5918 transitions. [2021-06-05 18:21:29,940 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 5918 transitions. Word has length 85 [2021-06-05 18:21:29,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:29,941 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 5918 transitions. [2021-06-05 18:21:29,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:29,941 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 5918 transitions. [2021-06-05 18:21:29,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:21:29,942 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:29,942 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:30,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:30,143 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:30,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:30,143 INFO L82 PathProgramCache]: Analyzing trace with hash -830526175, now seen corresponding path program 53 times [2021-06-05 18:21:30,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:30,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719395327] [2021-06-05 18:21:30,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:30,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:30,244 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:30,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:30,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719395327] [2021-06-05 18:21:30,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719395327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:30,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40974596] [2021-06-05 18:21:30,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:30,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 18:21:30,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:30,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:21:30,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:30,403 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:30,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40974596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:30,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:30,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 18:21:30,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796591289] [2021-06-05 18:21:30,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:21:30,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:30,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:21:30,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:21:30,404 INFO L87 Difference]: Start difference. First operand 2153 states and 5918 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:30,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:30,654 INFO L93 Difference]: Finished difference Result 3221 states and 8257 transitions. [2021-06-05 18:21:30,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:21:30,654 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-05 18:21:30,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:30,657 INFO L225 Difference]: With dead ends: 3221 [2021-06-05 18:21:30,657 INFO L226 Difference]: Without dead ends: 2951 [2021-06-05 18:21:30,657 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 247.0ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:21:30,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-06-05 18:21:30,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2228. [2021-06-05 18:21:30,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2227 states have (on average 2.7584193982936687) internal successors, (6143), 2227 states have internal predecessors, (6143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:30,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 6143 transitions. [2021-06-05 18:21:30,680 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 6143 transitions. Word has length 85 [2021-06-05 18:21:30,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:30,680 INFO L482 AbstractCegarLoop]: Abstraction has 2228 states and 6143 transitions. [2021-06-05 18:21:30,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:30,680 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 6143 transitions. [2021-06-05 18:21:30,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:21:30,681 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:30,682 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:30,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:30,897 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:30,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:30,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1516709359, now seen corresponding path program 54 times [2021-06-05 18:21:30,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:30,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601651352] [2021-06-05 18:21:30,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:30,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:30,995 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:30,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:30,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601651352] [2021-06-05 18:21:30,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601651352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:30,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932850249] [2021-06-05 18:21:30,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:31,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 18:21:31,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:31,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:21:31,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:31,169 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:31,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932850249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:31,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:31,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:21:31,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947510020] [2021-06-05 18:21:31,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:21:31,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:31,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:21:31,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:21:31,170 INFO L87 Difference]: Start difference. First operand 2228 states and 6143 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:31,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:31,480 INFO L93 Difference]: Finished difference Result 3246 states and 8382 transitions. [2021-06-05 18:21:31,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:21:31,480 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-05 18:21:31,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:31,482 INFO L225 Difference]: With dead ends: 3246 [2021-06-05 18:21:31,483 INFO L226 Difference]: Without dead ends: 2976 [2021-06-05 18:21:31,483 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 300.6ms TimeCoverageRelationStatistics Valid=334, Invalid=1072, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:21:31,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2976 states. [2021-06-05 18:21:31,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2976 to 2303. [2021-06-05 18:21:31,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 2302 states have (on average 2.7662901824500437) internal successors, (6368), 2302 states have internal predecessors, (6368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:31,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 6368 transitions. [2021-06-05 18:21:31,507 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 6368 transitions. Word has length 85 [2021-06-05 18:21:31,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:31,507 INFO L482 AbstractCegarLoop]: Abstraction has 2303 states and 6368 transitions. [2021-06-05 18:21:31,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:31,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 6368 transitions. [2021-06-05 18:21:31,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:21:31,509 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:31,509 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:31,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:31,709 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:31,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:31,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1601744097, now seen corresponding path program 55 times [2021-06-05 18:21:31,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:31,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374291313] [2021-06-05 18:21:31,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:31,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:31,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:31,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374291313] [2021-06-05 18:21:31,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374291313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:31,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348727193] [2021-06-05 18:21:31,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:31,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:31,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:21:31,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:31,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348727193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:31,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:31,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 18:21:31,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675231613] [2021-06-05 18:21:31,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:21:31,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:31,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:21:31,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:21:31,973 INFO L87 Difference]: Start difference. First operand 2303 states and 6368 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:32,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:32,248 INFO L93 Difference]: Finished difference Result 3271 states and 8507 transitions. [2021-06-05 18:21:32,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:21:32,248 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-05 18:21:32,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:32,251 INFO L225 Difference]: With dead ends: 3271 [2021-06-05 18:21:32,251 INFO L226 Difference]: Without dead ends: 3001 [2021-06-05 18:21:32,252 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 263.3ms TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:21:32,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-06-05 18:21:32,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 2378. [2021-06-05 18:21:32,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.7736642827092974) internal successors, (6593), 2377 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:32,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6593 transitions. [2021-06-05 18:21:32,276 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6593 transitions. Word has length 85 [2021-06-05 18:21:32,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:32,276 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6593 transitions. [2021-06-05 18:21:32,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:32,277 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6593 transitions. [2021-06-05 18:21:32,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:21:32,278 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:32,278 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:32,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 18:21:32,479 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:32,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:32,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1669895153, now seen corresponding path program 56 times [2021-06-05 18:21:32,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:32,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527833142] [2021-06-05 18:21:32,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:32,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:32,587 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:32,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:32,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527833142] [2021-06-05 18:21:32,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527833142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:32,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621027088] [2021-06-05 18:21:32,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:32,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:21:32,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:32,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:21:32,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:32,750 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:32,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621027088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:32,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:32,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:21:32,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367734333] [2021-06-05 18:21:32,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:21:32,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:32,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:21:32,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:21:32,751 INFO L87 Difference]: Start difference. First operand 2378 states and 6593 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:33,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:33,098 INFO L93 Difference]: Finished difference Result 3296 states and 8632 transitions. [2021-06-05 18:21:33,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:21:33,099 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-05 18:21:33,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:33,101 INFO L225 Difference]: With dead ends: 3296 [2021-06-05 18:21:33,101 INFO L226 Difference]: Without dead ends: 3026 [2021-06-05 18:21:33,102 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 341.8ms TimeCoverageRelationStatistics Valid=379, Invalid=1181, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:21:33,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2021-06-05 18:21:33,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 2453. [2021-06-05 18:21:33,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 2452 states have (on average 2.7805872756933114) internal successors, (6818), 2452 states have internal predecessors, (6818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:33,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 6818 transitions. [2021-06-05 18:21:33,126 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 6818 transitions. Word has length 85 [2021-06-05 18:21:33,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:33,126 INFO L482 AbstractCegarLoop]: Abstraction has 2453 states and 6818 transitions. [2021-06-05 18:21:33,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:33,126 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 6818 transitions. [2021-06-05 18:21:33,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:21:33,128 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:33,128 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:33,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:33,329 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:33,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:33,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1328103069, now seen corresponding path program 57 times [2021-06-05 18:21:33,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:33,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520460090] [2021-06-05 18:21:33,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:33,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:33,422 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:33,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:33,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520460090] [2021-06-05 18:21:33,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520460090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:33,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419367840] [2021-06-05 18:21:33,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:33,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 18:21:33,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:33,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:21:33,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:33,604 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:33,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419367840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:33,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:33,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 18:21:33,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027359723] [2021-06-05 18:21:33,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:21:33,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:33,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:21:33,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:21:33,605 INFO L87 Difference]: Start difference. First operand 2453 states and 6818 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:33,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:33,915 INFO L93 Difference]: Finished difference Result 3366 states and 8877 transitions. [2021-06-05 18:21:33,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:21:33,915 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-05 18:21:33,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:33,918 INFO L225 Difference]: With dead ends: 3366 [2021-06-05 18:21:33,918 INFO L226 Difference]: Without dead ends: 3096 [2021-06-05 18:21:33,918 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 274.7ms TimeCoverageRelationStatistics Valid=413, Invalid=1147, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:21:33,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3096 states. [2021-06-05 18:21:33,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3096 to 2528. [2021-06-05 18:21:33,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2527 states have (on average 2.7930352196280173) internal successors, (7058), 2527 states have internal predecessors, (7058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:33,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 7058 transitions. [2021-06-05 18:21:33,944 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 7058 transitions. Word has length 85 [2021-06-05 18:21:33,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:33,944 INFO L482 AbstractCegarLoop]: Abstraction has 2528 states and 7058 transitions. [2021-06-05 18:21:33,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:33,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 7058 transitions. [2021-06-05 18:21:33,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:21:33,946 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:33,946 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:34,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 18:21:34,146 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:34,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:34,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1757856653, now seen corresponding path program 58 times [2021-06-05 18:21:34,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:34,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116005903] [2021-06-05 18:21:34,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:34,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:34,261 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:34,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:34,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116005903] [2021-06-05 18:21:34,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116005903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:34,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682560464] [2021-06-05 18:21:34,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:34,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:21:34,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:34,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:21:34,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:34,427 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:34,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682560464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:34,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:34,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:21:34,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935704946] [2021-06-05 18:21:34,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:21:34,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:34,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:21:34,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:21:34,428 INFO L87 Difference]: Start difference. First operand 2528 states and 7058 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:34,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:34,881 INFO L93 Difference]: Finished difference Result 3944 states and 10503 transitions. [2021-06-05 18:21:34,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:21:34,881 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-05 18:21:34,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:34,885 INFO L225 Difference]: With dead ends: 3944 [2021-06-05 18:21:34,885 INFO L226 Difference]: Without dead ends: 3321 [2021-06-05 18:21:34,885 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 411.7ms TimeCoverageRelationStatistics Valid=463, Invalid=1429, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:21:34,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3321 states. [2021-06-05 18:21:34,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3321 to 2603. [2021-06-05 18:21:34,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.800922367409685) internal successors, (7288), 2602 states have internal predecessors, (7288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:34,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7288 transitions. [2021-06-05 18:21:34,909 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7288 transitions. Word has length 85 [2021-06-05 18:21:34,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:34,909 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7288 transitions. [2021-06-05 18:21:34,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:34,909 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7288 transitions. [2021-06-05 18:21:34,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:21:34,911 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:34,911 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:35,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:35,112 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:35,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:35,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1700122523, now seen corresponding path program 59 times [2021-06-05 18:21:35,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:35,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998107149] [2021-06-05 18:21:35,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:35,244 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:35,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:35,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998107149] [2021-06-05 18:21:35,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998107149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:35,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143668771] [2021-06-05 18:21:35,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:35,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 18:21:35,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:35,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:21:35,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:35,424 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:35,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143668771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:35,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:35,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 18:21:35,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001331580] [2021-06-05 18:21:35,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:21:35,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:35,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:21:35,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:21:35,425 INFO L87 Difference]: Start difference. First operand 2603 states and 7288 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:35,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:35,756 INFO L93 Difference]: Finished difference Result 4148 states and 11171 transitions. [2021-06-05 18:21:35,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:21:35,756 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-05 18:21:35,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:35,761 INFO L225 Difference]: With dead ends: 4148 [2021-06-05 18:21:35,761 INFO L226 Difference]: Without dead ends: 3878 [2021-06-05 18:21:35,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 294.4ms TimeCoverageRelationStatistics Valid=489, Invalid=1233, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:21:35,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3878 states. [2021-06-05 18:21:35,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3878 to 2783. [2021-06-05 18:21:35,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2782 states have (on average 2.8206326383896476) internal successors, (7847), 2782 states have internal predecessors, (7847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:35,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 7847 transitions. [2021-06-05 18:21:35,794 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 7847 transitions. Word has length 85 [2021-06-05 18:21:35,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:35,794 INFO L482 AbstractCegarLoop]: Abstraction has 2783 states and 7847 transitions. [2021-06-05 18:21:35,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:35,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 7847 transitions. [2021-06-05 18:21:35,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:21:35,796 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:35,796 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:35,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 18:21:35,997 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:35,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:35,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1722465773, now seen corresponding path program 60 times [2021-06-05 18:21:35,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:35,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364830027] [2021-06-05 18:21:35,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:36,083 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:36,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:36,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364830027] [2021-06-05 18:21:36,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364830027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:36,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148295581] [2021-06-05 18:21:36,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:36,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 18:21:36,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:36,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:21:36,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:36,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148295581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:36,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:36,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:21:36,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328251796] [2021-06-05 18:21:36,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:21:36,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:36,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:21:36,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:21:36,259 INFO L87 Difference]: Start difference. First operand 2783 states and 7847 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:36,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:36,724 INFO L93 Difference]: Finished difference Result 4016 states and 10836 transitions. [2021-06-05 18:21:36,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:21:36,724 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-05 18:21:36,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:36,728 INFO L225 Difference]: With dead ends: 4016 [2021-06-05 18:21:36,728 INFO L226 Difference]: Without dead ends: 3441 [2021-06-05 18:21:36,728 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 422.2ms TimeCoverageRelationStatistics Valid=521, Invalid=1641, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:21:36,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3441 states. [2021-06-05 18:21:36,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3441 to 1924. [2021-06-05 18:21:36,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 2.733229329173167) internal successors, (5256), 1923 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:36,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 5256 transitions. [2021-06-05 18:21:36,748 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 5256 transitions. Word has length 85 [2021-06-05 18:21:36,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:36,749 INFO L482 AbstractCegarLoop]: Abstraction has 1924 states and 5256 transitions. [2021-06-05 18:21:36,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:36,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 5256 transitions. [2021-06-05 18:21:36,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:21:36,750 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:36,750 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:36,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:36,953 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:36,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:36,953 INFO L82 PathProgramCache]: Analyzing trace with hash -750339617, now seen corresponding path program 61 times [2021-06-05 18:21:36,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:36,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138694119] [2021-06-05 18:21:36,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:36,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:37,125 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:37,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:37,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138694119] [2021-06-05 18:21:37,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138694119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:37,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750003564] [2021-06-05 18:21:37,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:37,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:37,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:21:37,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:37,297 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:37,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750003564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:37,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:37,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:21:37,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145675359] [2021-06-05 18:21:37,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:21:37,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:37,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:21:37,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:21:37,299 INFO L87 Difference]: Start difference. First operand 1924 states and 5256 transitions. Second operand has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:37,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:37,588 INFO L93 Difference]: Finished difference Result 2864 states and 7456 transitions. [2021-06-05 18:21:37,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:21:37,588 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-05 18:21:37,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:37,591 INFO L225 Difference]: With dead ends: 2864 [2021-06-05 18:21:37,591 INFO L226 Difference]: Without dead ends: 2530 [2021-06-05 18:21:37,591 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 312.1ms TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:21:37,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-06-05 18:21:37,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2009. [2021-06-05 18:21:37,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 2.702191235059761) internal successors, (5426), 2008 states have internal predecessors, (5426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:37,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 5426 transitions. [2021-06-05 18:21:37,610 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 5426 transitions. Word has length 90 [2021-06-05 18:21:37,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:37,616 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 5426 transitions. [2021-06-05 18:21:37,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:37,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 5426 transitions. [2021-06-05 18:21:37,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:21:37,618 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:37,618 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:37,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 18:21:37,834 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:37,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:37,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1583179645, now seen corresponding path program 62 times [2021-06-05 18:21:37,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:37,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435263697] [2021-06-05 18:21:37,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:37,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:37,967 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:37,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:37,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435263697] [2021-06-05 18:21:37,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435263697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:37,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770154747] [2021-06-05 18:21:37,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:38,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:21:38,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:38,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:21:38,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:38,132 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:38,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770154747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:38,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:38,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 18:21:38,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499247455] [2021-06-05 18:21:38,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:21:38,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:38,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:21:38,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:21:38,133 INFO L87 Difference]: Start difference. First operand 2009 states and 5426 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:38,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:38,355 INFO L93 Difference]: Finished difference Result 3386 states and 8437 transitions. [2021-06-05 18:21:38,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:21:38,355 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-05 18:21:38,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:38,358 INFO L225 Difference]: With dead ends: 3386 [2021-06-05 18:21:38,358 INFO L226 Difference]: Without dead ends: 3116 [2021-06-05 18:21:38,358 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 254.2ms TimeCoverageRelationStatistics Valid=260, Invalid=732, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:21:38,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2021-06-05 18:21:38,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 2153. [2021-06-05 18:21:38,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 2.715148698884758) internal successors, (5843), 2152 states have internal predecessors, (5843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:38,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 5843 transitions. [2021-06-05 18:21:38,379 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 5843 transitions. Word has length 90 [2021-06-05 18:21:38,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:38,379 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 5843 transitions. [2021-06-05 18:21:38,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:38,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 5843 transitions. [2021-06-05 18:21:38,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:21:38,381 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:38,381 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:38,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-06-05 18:21:38,581 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:38,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:38,582 INFO L82 PathProgramCache]: Analyzing trace with hash -2037093005, now seen corresponding path program 63 times [2021-06-05 18:21:38,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:38,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292898294] [2021-06-05 18:21:38,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:38,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:38,700 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:38,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:38,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292898294] [2021-06-05 18:21:38,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292898294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:38,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537226238] [2021-06-05 18:21:38,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:38,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 18:21:38,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:38,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:21:38,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:38,893 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:38,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537226238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:38,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:38,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 18:21:38,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279507298] [2021-06-05 18:21:38,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:21:38,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:38,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:21:38,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:21:38,894 INFO L87 Difference]: Start difference. First operand 2153 states and 5843 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:39,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:39,161 INFO L93 Difference]: Finished difference Result 3346 states and 8432 transitions. [2021-06-05 18:21:39,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:21:39,161 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-05 18:21:39,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:39,164 INFO L225 Difference]: With dead ends: 3346 [2021-06-05 18:21:39,164 INFO L226 Difference]: Without dead ends: 3076 [2021-06-05 18:21:39,165 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 275.9ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:21:39,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2021-06-05 18:21:39,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 2228. [2021-06-05 18:21:39,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2227 states have (on average 2.724741805118994) internal successors, (6068), 2227 states have internal predecessors, (6068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:39,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 6068 transitions. [2021-06-05 18:21:39,187 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 6068 transitions. Word has length 90 [2021-06-05 18:21:39,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:39,187 INFO L482 AbstractCegarLoop]: Abstraction has 2228 states and 6068 transitions. [2021-06-05 18:21:39,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:39,187 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 6068 transitions. [2021-06-05 18:21:39,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:21:39,189 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:39,189 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:39,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:39,405 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:39,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:39,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1159081087, now seen corresponding path program 64 times [2021-06-05 18:21:39,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:39,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989308502] [2021-06-05 18:21:39,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:39,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:39,504 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:39,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:39,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989308502] [2021-06-05 18:21:39,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989308502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:39,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463491617] [2021-06-05 18:21:39,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:39,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:21:39,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:39,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:21:39,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:39,678 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:39,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463491617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:39,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:39,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 18:21:39,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320583033] [2021-06-05 18:21:39,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:21:39,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:39,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:21:39,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:21:39,679 INFO L87 Difference]: Start difference. First operand 2228 states and 6068 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:39,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:39,909 INFO L93 Difference]: Finished difference Result 3396 states and 8607 transitions. [2021-06-05 18:21:39,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:21:39,910 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-05 18:21:39,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:39,912 INFO L225 Difference]: With dead ends: 3396 [2021-06-05 18:21:39,912 INFO L226 Difference]: Without dead ends: 3126 [2021-06-05 18:21:39,913 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 227.0ms TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:21:39,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-06-05 18:21:39,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2303. [2021-06-05 18:21:39,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 2302 states have (on average 2.7337098175499563) internal successors, (6293), 2302 states have internal predecessors, (6293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:39,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 6293 transitions. [2021-06-05 18:21:39,935 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 6293 transitions. Word has length 90 [2021-06-05 18:21:39,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:39,935 INFO L482 AbstractCegarLoop]: Abstraction has 2303 states and 6293 transitions. [2021-06-05 18:21:39,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:39,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 6293 transitions. [2021-06-05 18:21:39,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:21:39,937 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:39,937 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:40,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:40,137 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:40,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:40,138 INFO L82 PathProgramCache]: Analyzing trace with hash -2059135887, now seen corresponding path program 65 times [2021-06-05 18:21:40,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:40,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487513140] [2021-06-05 18:21:40,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:40,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:40,259 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:40,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:40,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487513140] [2021-06-05 18:21:40,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487513140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:40,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201029310] [2021-06-05 18:21:40,259 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:40,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 18:21:40,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:40,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:21:40,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:40,421 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:40,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201029310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:40,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:40,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 18:21:40,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506138224] [2021-06-05 18:21:40,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:21:40,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:40,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:21:40,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:21:40,422 INFO L87 Difference]: Start difference. First operand 2303 states and 6293 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:40,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:40,745 INFO L93 Difference]: Finished difference Result 3421 states and 8732 transitions. [2021-06-05 18:21:40,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:21:40,745 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-05 18:21:40,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:40,748 INFO L225 Difference]: With dead ends: 3421 [2021-06-05 18:21:40,748 INFO L226 Difference]: Without dead ends: 3151 [2021-06-05 18:21:40,748 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 310.1ms TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:21:40,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-06-05 18:21:40,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2378. [2021-06-05 18:21:40,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.7421119057635677) internal successors, (6518), 2377 states have internal predecessors, (6518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:40,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6518 transitions. [2021-06-05 18:21:40,771 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6518 transitions. Word has length 90 [2021-06-05 18:21:40,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:40,771 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6518 transitions. [2021-06-05 18:21:40,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:40,771 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6518 transitions. [2021-06-05 18:21:40,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:21:40,773 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:40,773 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:40,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 18:21:40,981 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:40,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:40,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1806767103, now seen corresponding path program 66 times [2021-06-05 18:21:40,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:40,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007316819] [2021-06-05 18:21:40,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:40,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:41,085 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:41,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:41,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007316819] [2021-06-05 18:21:41,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007316819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:41,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631578629] [2021-06-05 18:21:41,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:41,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 18:21:41,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:41,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:21:41,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:41,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631578629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:41,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:41,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 18:21:41,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069826780] [2021-06-05 18:21:41,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:21:41,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:41,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:21:41,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:21:41,242 INFO L87 Difference]: Start difference. First operand 2378 states and 6518 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:41,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:41,510 INFO L93 Difference]: Finished difference Result 3446 states and 8857 transitions. [2021-06-05 18:21:41,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:21:41,511 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-05 18:21:41,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:41,513 INFO L225 Difference]: With dead ends: 3446 [2021-06-05 18:21:41,513 INFO L226 Difference]: Without dead ends: 3176 [2021-06-05 18:21:41,514 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 253.8ms TimeCoverageRelationStatistics Valid=302, Invalid=958, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:21:41,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-06-05 18:21:41,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2453. [2021-06-05 18:21:41,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 2452 states have (on average 2.75) internal successors, (6743), 2452 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:41,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 6743 transitions. [2021-06-05 18:21:41,537 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 6743 transitions. Word has length 90 [2021-06-05 18:21:41,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:41,537 INFO L482 AbstractCegarLoop]: Abstraction has 2453 states and 6743 transitions. [2021-06-05 18:21:41,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:41,537 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 6743 transitions. [2021-06-05 18:21:41,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:21:41,539 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:41,539 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:41,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:41,740 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:41,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:41,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1120583919, now seen corresponding path program 67 times [2021-06-05 18:21:41,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:41,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788112729] [2021-06-05 18:21:41,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:41,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:41,855 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:41,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:41,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788112729] [2021-06-05 18:21:41,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788112729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:41,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473093283] [2021-06-05 18:21:41,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:41,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:41,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:21:41,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:42,025 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:42,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473093283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:42,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:42,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 18:21:42,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162198179] [2021-06-05 18:21:42,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:21:42,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:42,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:21:42,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:21:42,026 INFO L87 Difference]: Start difference. First operand 2453 states and 6743 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:42,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:42,401 INFO L93 Difference]: Finished difference Result 3471 states and 8982 transitions. [2021-06-05 18:21:42,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:21:42,402 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-05 18:21:42,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:42,404 INFO L225 Difference]: With dead ends: 3471 [2021-06-05 18:21:42,404 INFO L226 Difference]: Without dead ends: 3201 [2021-06-05 18:21:42,405 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 361.6ms TimeCoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:21:42,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2021-06-05 18:21:42,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 2528. [2021-06-05 18:21:42,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2527 states have (on average 2.7574198654531066) internal successors, (6968), 2527 states have internal predecessors, (6968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:42,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 6968 transitions. [2021-06-05 18:21:42,429 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 6968 transitions. Word has length 90 [2021-06-05 18:21:42,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:42,429 INFO L482 AbstractCegarLoop]: Abstraction has 2528 states and 6968 transitions. [2021-06-05 18:21:42,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:42,429 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 6968 transitions. [2021-06-05 18:21:42,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:21:42,431 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:42,431 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:42,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 18:21:42,645 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:42,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:42,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1035549181, now seen corresponding path program 68 times [2021-06-05 18:21:42,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:42,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432540616] [2021-06-05 18:21:42,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:42,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:42,741 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:42,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:42,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432540616] [2021-06-05 18:21:42,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432540616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:42,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123360471] [2021-06-05 18:21:42,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:42,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:21:42,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:42,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:21:42,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:42,900 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:42,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123360471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:42,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:42,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 18:21:42,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235621889] [2021-06-05 18:21:42,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:21:42,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:42,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:21:42,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:21:42,902 INFO L87 Difference]: Start difference. First operand 2528 states and 6968 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:43,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:43,197 INFO L93 Difference]: Finished difference Result 3496 states and 9107 transitions. [2021-06-05 18:21:43,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:21:43,198 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-05 18:21:43,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:43,201 INFO L225 Difference]: With dead ends: 3496 [2021-06-05 18:21:43,201 INFO L226 Difference]: Without dead ends: 3226 [2021-06-05 18:21:43,201 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 276.2ms TimeCoverageRelationStatistics Valid=347, Invalid=1059, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:21:43,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-06-05 18:21:43,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 2603. [2021-06-05 18:21:43,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.764411990776326) internal successors, (7193), 2602 states have internal predecessors, (7193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:43,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7193 transitions. [2021-06-05 18:21:43,226 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7193 transitions. Word has length 90 [2021-06-05 18:21:43,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:43,226 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7193 transitions. [2021-06-05 18:21:43,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:43,226 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7193 transitions. [2021-06-05 18:21:43,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:21:43,228 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:43,228 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:43,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:43,429 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:43,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:43,429 INFO L82 PathProgramCache]: Analyzing trace with hash 967398125, now seen corresponding path program 69 times [2021-06-05 18:21:43,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:43,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165090157] [2021-06-05 18:21:43,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:43,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:43,537 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:43,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:43,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165090157] [2021-06-05 18:21:43,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165090157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:43,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726915636] [2021-06-05 18:21:43,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:43,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 18:21:43,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:43,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:21:43,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:43,704 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:43,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726915636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:43,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:43,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 18:21:43,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188163302] [2021-06-05 18:21:43,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:21:43,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:43,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:21:43,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:21:43,705 INFO L87 Difference]: Start difference. First operand 2603 states and 7193 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:44,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:44,107 INFO L93 Difference]: Finished difference Result 3521 states and 9232 transitions. [2021-06-05 18:21:44,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:21:44,107 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-05 18:21:44,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:44,110 INFO L225 Difference]: With dead ends: 3521 [2021-06-05 18:21:44,110 INFO L226 Difference]: Without dead ends: 3251 [2021-06-05 18:21:44,110 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 379.6ms TimeCoverageRelationStatistics Valid=356, Invalid=1204, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:21:44,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3251 states. [2021-06-05 18:21:44,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3251 to 2678. [2021-06-05 18:21:44,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 2677 states have (on average 2.771012327231976) internal successors, (7418), 2677 states have internal predecessors, (7418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:44,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 7418 transitions. [2021-06-05 18:21:44,137 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 7418 transitions. Word has length 90 [2021-06-05 18:21:44,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:44,137 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 7418 transitions. [2021-06-05 18:21:44,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:44,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 7418 transitions. [2021-06-05 18:21:44,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:21:44,139 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:44,139 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:44,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 18:21:44,339 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:44,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:44,340 INFO L82 PathProgramCache]: Analyzing trace with hash -329570949, now seen corresponding path program 70 times [2021-06-05 18:21:44,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:44,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600547635] [2021-06-05 18:21:44,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:44,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:44,438 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:44,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:44,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600547635] [2021-06-05 18:21:44,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600547635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:44,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732563858] [2021-06-05 18:21:44,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:44,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:21:44,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:44,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:21:44,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:44,602 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:44,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732563858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:44,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:44,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 18:21:44,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686056562] [2021-06-05 18:21:44,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:21:44,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:44,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:21:44,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:21:44,603 INFO L87 Difference]: Start difference. First operand 2678 states and 7418 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:44,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:44,936 INFO L93 Difference]: Finished difference Result 3591 states and 9477 transitions. [2021-06-05 18:21:44,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:21:44,936 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-05 18:21:44,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:44,940 INFO L225 Difference]: With dead ends: 3591 [2021-06-05 18:21:44,940 INFO L226 Difference]: Without dead ends: 3321 [2021-06-05 18:21:44,940 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 302.8ms TimeCoverageRelationStatistics Valid=408, Invalid=1152, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:21:44,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3321 states. [2021-06-05 18:21:44,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3321 to 2753. [2021-06-05 18:21:44,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 2.782703488372093) internal successors, (7658), 2752 states have internal predecessors, (7658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:44,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7658 transitions. [2021-06-05 18:21:44,971 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7658 transitions. Word has length 90 [2021-06-05 18:21:44,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:44,971 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7658 transitions. [2021-06-05 18:21:44,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:44,971 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7658 transitions. [2021-06-05 18:21:44,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:21:44,973 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:44,973 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:45,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:45,190 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:45,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:45,190 INFO L82 PathProgramCache]: Analyzing trace with hash 100182635, now seen corresponding path program 71 times [2021-06-05 18:21:45,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:45,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595930443] [2021-06-05 18:21:45,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:45,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:45,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:45,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595930443] [2021-06-05 18:21:45,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595930443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:45,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602938490] [2021-06-05 18:21:45,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:45,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 18:21:45,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:45,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:21:45,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:45,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602938490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:45,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:45,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 18:21:45,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508704649] [2021-06-05 18:21:45,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:21:45,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:45,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:21:45,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:21:45,493 INFO L87 Difference]: Start difference. First operand 2753 states and 7658 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:45,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:45,997 INFO L93 Difference]: Finished difference Result 4169 states and 11103 transitions. [2021-06-05 18:21:45,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:21:45,997 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-05 18:21:45,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:46,000 INFO L225 Difference]: With dead ends: 4169 [2021-06-05 18:21:46,000 INFO L226 Difference]: Without dead ends: 3546 [2021-06-05 18:21:46,001 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 450.3ms TimeCoverageRelationStatistics Valid=512, Invalid=1558, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:21:46,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3546 states. [2021-06-05 18:21:46,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3546 to 2828. [2021-06-05 18:21:46,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 2.790237000353732) internal successors, (7888), 2827 states have internal predecessors, (7888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:46,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7888 transitions. [2021-06-05 18:21:46,033 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7888 transitions. Word has length 90 [2021-06-05 18:21:46,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:46,033 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7888 transitions. [2021-06-05 18:21:46,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:46,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7888 transitions. [2021-06-05 18:21:46,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:21:46,035 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:46,036 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:46,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 18:21:46,236 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:46,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:46,236 INFO L82 PathProgramCache]: Analyzing trace with hash 42448505, now seen corresponding path program 72 times [2021-06-05 18:21:46,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:46,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669675551] [2021-06-05 18:21:46,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:46,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:46,337 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:46,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:46,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669675551] [2021-06-05 18:21:46,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669675551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:46,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837864145] [2021-06-05 18:21:46,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:46,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 18:21:46,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:46,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:21:46,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:46,509 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:46,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837864145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:46,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:46,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 18:21:46,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928986373] [2021-06-05 18:21:46,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:21:46,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:46,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:21:46,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:21:46,510 INFO L87 Difference]: Start difference. First operand 2828 states and 7888 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:46,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:46,873 INFO L93 Difference]: Finished difference Result 4398 states and 11821 transitions. [2021-06-05 18:21:46,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:21:46,873 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-05 18:21:46,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:46,877 INFO L225 Difference]: With dead ends: 4398 [2021-06-05 18:21:46,877 INFO L226 Difference]: Without dead ends: 4128 [2021-06-05 18:21:46,877 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 330.1ms TimeCoverageRelationStatistics Valid=486, Invalid=1236, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:21:46,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4128 states. [2021-06-05 18:21:46,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4128 to 3008. [2021-06-05 18:21:46,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 2.809112071832391) internal successors, (8447), 3007 states have internal predecessors, (8447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:46,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 8447 transitions. [2021-06-05 18:21:46,907 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 8447 transitions. Word has length 90 [2021-06-05 18:21:46,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:46,908 INFO L482 AbstractCegarLoop]: Abstraction has 3008 states and 8447 transitions. [2021-06-05 18:21:46,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:46,908 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 8447 transitions. [2021-06-05 18:21:46,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:21:46,909 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:46,910 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:47,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:47,110 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:47,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:47,110 INFO L82 PathProgramCache]: Analyzing trace with hash 64791755, now seen corresponding path program 73 times [2021-06-05 18:21:47,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:47,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087126190] [2021-06-05 18:21:47,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:47,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:47,204 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:47,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:47,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087126190] [2021-06-05 18:21:47,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087126190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:47,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688791615] [2021-06-05 18:21:47,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:47,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:47,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:21:47,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:47,359 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:47,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688791615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:47,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:47,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 18:21:47,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805539552] [2021-06-05 18:21:47,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:21:47,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:47,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:21:47,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:21:47,360 INFO L87 Difference]: Start difference. First operand 3008 states and 8447 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:47,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:47,830 INFO L93 Difference]: Finished difference Result 3885 states and 10521 transitions. [2021-06-05 18:21:47,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:21:47,830 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-05 18:21:47,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:47,833 INFO L225 Difference]: With dead ends: 3885 [2021-06-05 18:21:47,833 INFO L226 Difference]: Without dead ends: 3306 [2021-06-05 18:21:47,834 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 435.5ms TimeCoverageRelationStatistics Valid=579, Invalid=1491, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:21:47,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2021-06-05 18:21:47,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 2113. [2021-06-05 18:21:47,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 2.7357954545454546) internal successors, (5778), 2112 states have internal predecessors, (5778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:47,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 5778 transitions. [2021-06-05 18:21:47,856 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 5778 transitions. Word has length 90 [2021-06-05 18:21:47,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:47,856 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 5778 transitions. [2021-06-05 18:21:47,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:47,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 5778 transitions. [2021-06-05 18:21:47,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:21:47,857 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:47,857 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:48,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:48,058 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:48,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:48,058 INFO L82 PathProgramCache]: Analyzing trace with hash -472912364, now seen corresponding path program 74 times [2021-06-05 18:21:48,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:48,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085591331] [2021-06-05 18:21:48,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:48,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:48,206 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:48,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:48,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085591331] [2021-06-05 18:21:48,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085591331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:48,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270187937] [2021-06-05 18:21:48,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:48,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:21:48,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:48,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:21:48,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:48,365 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:48,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270187937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:48,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:48,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 18:21:48,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984688567] [2021-06-05 18:21:48,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:21:48,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:48,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:21:48,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:21:48,366 INFO L87 Difference]: Start difference. First operand 2113 states and 5778 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:48,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:48,628 INFO L93 Difference]: Finished difference Result 3131 states and 8017 transitions. [2021-06-05 18:21:48,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:21:48,628 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-05 18:21:48,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:48,630 INFO L225 Difference]: With dead ends: 3131 [2021-06-05 18:21:48,630 INFO L226 Difference]: Without dead ends: 2861 [2021-06-05 18:21:48,631 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 283.7ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:21:48,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2021-06-05 18:21:48,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2188. [2021-06-05 18:21:48,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 2187 states have (on average 2.7448559670781894) internal successors, (6003), 2187 states have internal predecessors, (6003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:48,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 6003 transitions. [2021-06-05 18:21:48,651 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 6003 transitions. Word has length 95 [2021-06-05 18:21:48,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:48,651 INFO L482 AbstractCegarLoop]: Abstraction has 2188 states and 6003 transitions. [2021-06-05 18:21:48,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:48,651 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 6003 transitions. [2021-06-05 18:21:48,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:21:48,653 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:48,653 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:48,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:48,853 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:48,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:48,854 INFO L82 PathProgramCache]: Analyzing trace with hash -926825724, now seen corresponding path program 75 times [2021-06-05 18:21:48,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:48,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323480196] [2021-06-05 18:21:48,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:48,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:48,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:48,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323480196] [2021-06-05 18:21:48,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323480196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:48,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674767005] [2021-06-05 18:21:48,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:49,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 18:21:49,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:49,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:21:49,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:49,154 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:49,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674767005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:49,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:49,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 18:21:49,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135357388] [2021-06-05 18:21:49,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:21:49,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:49,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:21:49,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:21:49,155 INFO L87 Difference]: Start difference. First operand 2188 states and 6003 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:49,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:49,446 INFO L93 Difference]: Finished difference Result 3451 states and 8732 transitions. [2021-06-05 18:21:49,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:21:49,446 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-05 18:21:49,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:49,449 INFO L225 Difference]: With dead ends: 3451 [2021-06-05 18:21:49,449 INFO L226 Difference]: Without dead ends: 3181 [2021-06-05 18:21:49,449 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 310.9ms TimeCoverageRelationStatistics Valid=355, Invalid=1127, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:21:49,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3181 states. [2021-06-05 18:21:49,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3181 to 2263. [2021-06-05 18:21:49,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 2.753315649867374) internal successors, (6228), 2262 states have internal predecessors, (6228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:49,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6228 transitions. [2021-06-05 18:21:49,471 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6228 transitions. Word has length 95 [2021-06-05 18:21:49,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:49,472 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6228 transitions. [2021-06-05 18:21:49,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:49,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6228 transitions. [2021-06-05 18:21:49,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:21:49,473 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:49,473 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:49,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:49,674 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:49,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:49,674 INFO L82 PathProgramCache]: Analyzing trace with hash -48813806, now seen corresponding path program 76 times [2021-06-05 18:21:49,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:49,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027616391] [2021-06-05 18:21:49,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:49,789 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:49,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:49,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027616391] [2021-06-05 18:21:49,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027616391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:49,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825925261] [2021-06-05 18:21:49,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:49,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:21:49,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:49,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:21:49,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:49,950 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:49,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825925261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:49,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:49,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 18:21:49,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991927694] [2021-06-05 18:21:49,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:21:49,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:49,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:21:49,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:21:49,951 INFO L87 Difference]: Start difference. First operand 2263 states and 6228 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:50,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:50,240 INFO L93 Difference]: Finished difference Result 3481 states and 8867 transitions. [2021-06-05 18:21:50,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:21:50,240 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-05 18:21:50,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:50,243 INFO L225 Difference]: With dead ends: 3481 [2021-06-05 18:21:50,243 INFO L226 Difference]: Without dead ends: 3211 [2021-06-05 18:21:50,243 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 283.1ms TimeCoverageRelationStatistics Valid=361, Invalid=1121, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:21:50,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2021-06-05 18:21:50,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 2338. [2021-06-05 18:21:50,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2338 states, 2337 states have (on average 2.761232349165597) internal successors, (6453), 2337 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:50,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 6453 transitions. [2021-06-05 18:21:50,267 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 6453 transitions. Word has length 95 [2021-06-05 18:21:50,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:50,267 INFO L482 AbstractCegarLoop]: Abstraction has 2338 states and 6453 transitions. [2021-06-05 18:21:50,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:50,267 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 6453 transitions. [2021-06-05 18:21:50,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:21:50,269 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:50,269 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:50,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:50,471 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:50,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:50,471 INFO L82 PathProgramCache]: Analyzing trace with hash -948868606, now seen corresponding path program 77 times [2021-06-05 18:21:50,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:50,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293039325] [2021-06-05 18:21:50,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:50,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:50,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:50,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293039325] [2021-06-05 18:21:50,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293039325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:50,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530288658] [2021-06-05 18:21:50,595 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:50,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 18:21:50,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:50,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:21:50,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:50,763 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:50,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530288658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:50,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:50,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 18:21:50,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251605529] [2021-06-05 18:21:50,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:21:50,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:50,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:21:50,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:21:50,765 INFO L87 Difference]: Start difference. First operand 2338 states and 6453 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:51,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:51,118 INFO L93 Difference]: Finished difference Result 3506 states and 8992 transitions. [2021-06-05 18:21:51,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:21:51,119 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-05 18:21:51,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:51,122 INFO L225 Difference]: With dead ends: 3506 [2021-06-05 18:21:51,122 INFO L226 Difference]: Without dead ends: 3236 [2021-06-05 18:21:51,122 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 344.8ms TimeCoverageRelationStatistics Valid=383, Invalid=1257, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:21:51,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-06-05 18:21:51,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 2413. [2021-06-05 18:21:51,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2413 states, 2412 states have (on average 2.7686567164179103) internal successors, (6678), 2412 states have internal predecessors, (6678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:51,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 6678 transitions. [2021-06-05 18:21:51,147 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 6678 transitions. Word has length 95 [2021-06-05 18:21:51,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:51,147 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 6678 transitions. [2021-06-05 18:21:51,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:51,147 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 6678 transitions. [2021-06-05 18:21:51,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:21:51,148 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:51,148 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:51,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:51,349 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:51,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:51,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1377932912, now seen corresponding path program 78 times [2021-06-05 18:21:51,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:51,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237426501] [2021-06-05 18:21:51,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:51,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:51,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237426501] [2021-06-05 18:21:51,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237426501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:51,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712135126] [2021-06-05 18:21:51,461 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:51,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 18:21:51,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:51,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:21:51,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:51,620 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:51,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712135126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:51,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:51,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 18:21:51,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990867404] [2021-06-05 18:21:51,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:21:51,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:51,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:21:51,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:21:51,620 INFO L87 Difference]: Start difference. First operand 2413 states and 6678 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:51,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:51,936 INFO L93 Difference]: Finished difference Result 3531 states and 9117 transitions. [2021-06-05 18:21:51,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:21:51,936 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-05 18:21:51,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:51,939 INFO L225 Difference]: With dead ends: 3531 [2021-06-05 18:21:51,940 INFO L226 Difference]: Without dead ends: 3261 [2021-06-05 18:21:51,940 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 298.1ms TimeCoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:21:51,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3261 states. [2021-06-05 18:21:51,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3261 to 2488. [2021-06-05 18:21:51,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.7756332931242462) internal successors, (6903), 2487 states have internal predecessors, (6903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:51,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6903 transitions. [2021-06-05 18:21:51,964 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6903 transitions. Word has length 95 [2021-06-05 18:21:51,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:51,964 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6903 transitions. [2021-06-05 18:21:51,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:51,965 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6903 transitions. [2021-06-05 18:21:51,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:21:51,966 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:51,966 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:52,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:52,177 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:52,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:52,177 INFO L82 PathProgramCache]: Analyzing trace with hash -2064116096, now seen corresponding path program 79 times [2021-06-05 18:21:52,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:52,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382300167] [2021-06-05 18:21:52,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:52,301 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:52,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:52,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382300167] [2021-06-05 18:21:52,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382300167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:52,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738224634] [2021-06-05 18:21:52,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:52,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:52,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:21:52,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:52,476 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:52,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738224634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:52,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:52,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 18:21:52,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069758786] [2021-06-05 18:21:52,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:21:52,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:52,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:21:52,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:21:52,477 INFO L87 Difference]: Start difference. First operand 2488 states and 6903 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:52,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:52,875 INFO L93 Difference]: Finished difference Result 3556 states and 9242 transitions. [2021-06-05 18:21:52,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:21:52,875 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-05 18:21:52,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:52,878 INFO L225 Difference]: With dead ends: 3556 [2021-06-05 18:21:52,878 INFO L226 Difference]: Without dead ends: 3286 [2021-06-05 18:21:52,878 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 371.1ms TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:21:52,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2021-06-05 18:21:52,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 2563. [2021-06-05 18:21:52,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2562 states have (on average 2.782201405152225) internal successors, (7128), 2562 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:52,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7128 transitions. [2021-06-05 18:21:52,904 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7128 transitions. Word has length 95 [2021-06-05 18:21:52,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:52,904 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7128 transitions. [2021-06-05 18:21:52,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:52,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7128 transitions. [2021-06-05 18:21:52,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:21:52,906 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:52,906 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:53,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 18:21:53,106 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:53,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:53,107 INFO L82 PathProgramCache]: Analyzing trace with hash 2145816462, now seen corresponding path program 80 times [2021-06-05 18:21:53,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:53,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737566990] [2021-06-05 18:21:53,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:53,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:53,204 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:53,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:53,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737566990] [2021-06-05 18:21:53,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737566990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:53,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520880243] [2021-06-05 18:21:53,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:53,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:21:53,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:53,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:21:53,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:53,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520880243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:53,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:53,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 18:21:53,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784192268] [2021-06-05 18:21:53,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:21:53,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:53,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:21:53,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:21:53,354 INFO L87 Difference]: Start difference. First operand 2563 states and 7128 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:53,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:53,685 INFO L93 Difference]: Finished difference Result 3581 states and 9367 transitions. [2021-06-05 18:21:53,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:21:53,685 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-05 18:21:53,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:53,689 INFO L225 Difference]: With dead ends: 3581 [2021-06-05 18:21:53,689 INFO L226 Difference]: Without dead ends: 3311 [2021-06-05 18:21:53,689 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 301.5ms TimeCoverageRelationStatistics Valid=461, Invalid=1345, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:21:53,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3311 states. [2021-06-05 18:21:53,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3311 to 2638. [2021-06-05 18:21:53,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2638 states, 2637 states have (on average 2.78839590443686) internal successors, (7353), 2637 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:53,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 7353 transitions. [2021-06-05 18:21:53,715 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 7353 transitions. Word has length 95 [2021-06-05 18:21:53,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:53,716 INFO L482 AbstractCegarLoop]: Abstraction has 2638 states and 7353 transitions. [2021-06-05 18:21:53,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:53,716 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 7353 transitions. [2021-06-05 18:21:53,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:21:53,717 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:53,717 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:53,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:53,918 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:53,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:53,918 INFO L82 PathProgramCache]: Analyzing trace with hash 2077665406, now seen corresponding path program 81 times [2021-06-05 18:21:53,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:53,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614448203] [2021-06-05 18:21:53,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:53,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:54,027 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:54,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:54,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614448203] [2021-06-05 18:21:54,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614448203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:54,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112517947] [2021-06-05 18:21:54,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:54,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 18:21:54,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:54,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:21:54,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:54,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112517947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:54,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:54,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 18:21:54,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806092064] [2021-06-05 18:21:54,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:21:54,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:54,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:21:54,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:21:54,216 INFO L87 Difference]: Start difference. First operand 2638 states and 7353 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:54,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:54,639 INFO L93 Difference]: Finished difference Result 3606 states and 9492 transitions. [2021-06-05 18:21:54,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:21:54,639 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-05 18:21:54,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:54,643 INFO L225 Difference]: With dead ends: 3606 [2021-06-05 18:21:54,643 INFO L226 Difference]: Without dead ends: 3336 [2021-06-05 18:21:54,643 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 394.5ms TimeCoverageRelationStatistics Valid=466, Invalid=1514, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:21:54,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-06-05 18:21:54,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2713. [2021-06-05 18:21:54,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 2.7942477876106193) internal successors, (7578), 2712 states have internal predecessors, (7578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:54,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7578 transitions. [2021-06-05 18:21:54,671 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7578 transitions. Word has length 95 [2021-06-05 18:21:54,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:54,671 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7578 transitions. [2021-06-05 18:21:54,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:54,671 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7578 transitions. [2021-06-05 18:21:54,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:21:54,673 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:54,673 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:54,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 18:21:54,874 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:54,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:54,874 INFO L82 PathProgramCache]: Analyzing trace with hash 780696332, now seen corresponding path program 82 times [2021-06-05 18:21:54,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:54,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554921843] [2021-06-05 18:21:54,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:54,974 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:54,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:54,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554921843] [2021-06-05 18:21:54,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554921843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:54,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295411342] [2021-06-05 18:21:54,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:55,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:21:55,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:55,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:21:55,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:55,127 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:55,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295411342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:55,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:55,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 18:21:55,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754973329] [2021-06-05 18:21:55,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:21:55,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:55,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:21:55,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:21:55,128 INFO L87 Difference]: Start difference. First operand 2713 states and 7578 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:55,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:55,517 INFO L93 Difference]: Finished difference Result 3631 states and 9617 transitions. [2021-06-05 18:21:55,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:21:55,517 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-05 18:21:55,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:55,520 INFO L225 Difference]: With dead ends: 3631 [2021-06-05 18:21:55,520 INFO L226 Difference]: Without dead ends: 3361 [2021-06-05 18:21:55,521 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 342.7ms TimeCoverageRelationStatistics Valid=535, Invalid=1445, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:21:55,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3361 states. [2021-06-05 18:21:55,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3361 to 2788. [2021-06-05 18:21:55,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2788 states, 2787 states have (on average 2.79978471474704) internal successors, (7803), 2787 states have internal predecessors, (7803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:55,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7803 transitions. [2021-06-05 18:21:55,548 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7803 transitions. Word has length 95 [2021-06-05 18:21:55,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:55,548 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7803 transitions. [2021-06-05 18:21:55,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:55,548 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7803 transitions. [2021-06-05 18:21:55,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:21:55,550 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:55,550 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:55,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:55,751 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:55,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:55,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1210449916, now seen corresponding path program 83 times [2021-06-05 18:21:55,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:55,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171983015] [2021-06-05 18:21:55,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:55,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:55,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:55,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171983015] [2021-06-05 18:21:55,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171983015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:55,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037624389] [2021-06-05 18:21:55,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:55,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 18:21:55,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:55,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:21:55,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:56,022 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:56,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037624389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:56,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:56,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 18:21:56,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521150165] [2021-06-05 18:21:56,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:21:56,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:56,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:21:56,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:21:56,023 INFO L87 Difference]: Start difference. First operand 2788 states and 7803 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:56,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:56,508 INFO L93 Difference]: Finished difference Result 3716 states and 9907 transitions. [2021-06-05 18:21:56,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:21:56,508 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-05 18:21:56,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:56,511 INFO L225 Difference]: With dead ends: 3716 [2021-06-05 18:21:56,511 INFO L226 Difference]: Without dead ends: 3446 [2021-06-05 18:21:56,511 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 441.4ms TimeCoverageRelationStatistics Valid=563, Invalid=1599, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:21:56,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2021-06-05 18:21:56,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2863. [2021-06-05 18:21:56,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 2.8120195667365477) internal successors, (8048), 2862 states have internal predecessors, (8048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:56,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 8048 transitions. [2021-06-05 18:21:56,540 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 8048 transitions. Word has length 95 [2021-06-05 18:21:56,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:56,540 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 8048 transitions. [2021-06-05 18:21:56,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:56,540 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 8048 transitions. [2021-06-05 18:21:56,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:21:56,542 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:56,542 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:56,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:56,749 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:56,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:56,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1152715786, now seen corresponding path program 84 times [2021-06-05 18:21:56,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:56,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556084389] [2021-06-05 18:21:56,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:56,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:56,849 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:56,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:56,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556084389] [2021-06-05 18:21:56,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556084389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:56,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371312790] [2021-06-05 18:21:56,849 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:56,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 18:21:56,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:56,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:21:56,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:56,998 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:56,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371312790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:56,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:56,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 18:21:56,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084925529] [2021-06-05 18:21:56,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:21:56,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:56,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:21:56,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:21:56,999 INFO L87 Difference]: Start difference. First operand 2863 states and 8048 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:57,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:57,410 INFO L93 Difference]: Finished difference Result 4458 states and 12031 transitions. [2021-06-05 18:21:57,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:21:57,410 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-05 18:21:57,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:57,415 INFO L225 Difference]: With dead ends: 4458 [2021-06-05 18:21:57,415 INFO L226 Difference]: Without dead ends: 4188 [2021-06-05 18:21:57,415 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 372.8ms TimeCoverageRelationStatistics Valid=626, Invalid=1536, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:21:57,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2021-06-05 18:21:57,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 3043. [2021-06-05 18:21:57,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3043 states, 3042 states have (on average 2.829388560157791) internal successors, (8607), 3042 states have internal predecessors, (8607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:57,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 8607 transitions. [2021-06-05 18:21:57,446 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 8607 transitions. Word has length 95 [2021-06-05 18:21:57,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:57,446 INFO L482 AbstractCegarLoop]: Abstraction has 3043 states and 8607 transitions. [2021-06-05 18:21:57,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:57,446 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 8607 transitions. [2021-06-05 18:21:57,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:21:57,448 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:57,448 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:57,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:57,649 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:57,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:57,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1175059036, now seen corresponding path program 85 times [2021-06-05 18:21:57,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:57,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257472259] [2021-06-05 18:21:57,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:57,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:57,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:57,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257472259] [2021-06-05 18:21:57,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257472259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:57,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492737953] [2021-06-05 18:21:57,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:57,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:57,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:21:57,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:57,904 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:57,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492737953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:57,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:57,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 18:21:57,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095152958] [2021-06-05 18:21:57,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:21:57,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:57,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:21:57,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:21:57,905 INFO L87 Difference]: Start difference. First operand 3043 states and 8607 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:58,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:58,390 INFO L93 Difference]: Finished difference Result 3920 states and 10681 transitions. [2021-06-05 18:21:58,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:21:58,391 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-05 18:21:58,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:58,394 INFO L225 Difference]: With dead ends: 3920 [2021-06-05 18:21:58,394 INFO L226 Difference]: Without dead ends: 3431 [2021-06-05 18:21:58,394 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 449.4ms TimeCoverageRelationStatistics Valid=658, Invalid=1694, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:21:58,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3431 states. [2021-06-05 18:21:58,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3431 to 2034. [2021-06-05 18:21:58,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 2.73782587309395) internal successors, (5566), 2033 states have internal predecessors, (5566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:58,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 5566 transitions. [2021-06-05 18:21:58,417 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 5566 transitions. Word has length 95 [2021-06-05 18:21:58,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:58,417 INFO L482 AbstractCegarLoop]: Abstraction has 2034 states and 5566 transitions. [2021-06-05 18:21:58,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:58,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 5566 transitions. [2021-06-05 18:21:58,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:21:58,419 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:58,419 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:58,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:58,619 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:58,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:58,620 INFO L82 PathProgramCache]: Analyzing trace with hash -2003017648, now seen corresponding path program 86 times [2021-06-05 18:21:58,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:58,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189927920] [2021-06-05 18:21:58,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:58,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:58,764 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:58,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:58,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189927920] [2021-06-05 18:21:58,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189927920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:58,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167137944] [2021-06-05 18:21:58,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:58,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:21:58,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:58,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:21:58,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:58,956 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:58,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167137944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:58,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:58,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:21:58,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330895471] [2021-06-05 18:21:58,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:21:58,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:58,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:21:58,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:21:58,957 INFO L87 Difference]: Start difference. First operand 2034 states and 5566 transitions. Second operand has 22 states, 22 states have (on average 5.818181818181818) internal successors, (128), 22 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:59,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:59,265 INFO L93 Difference]: Finished difference Result 3024 states and 7866 transitions. [2021-06-05 18:21:59,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:21:59,266 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.818181818181818) internal successors, (128), 22 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 18:21:59,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:59,268 INFO L225 Difference]: With dead ends: 3024 [2021-06-05 18:21:59,268 INFO L226 Difference]: Without dead ends: 2690 [2021-06-05 18:21:59,269 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 342.7ms TimeCoverageRelationStatistics Valid=445, Invalid=1277, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:21:59,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2021-06-05 18:21:59,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 2119. [2021-06-05 18:21:59,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 2.7082152974504248) internal successors, (5736), 2118 states have internal predecessors, (5736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:59,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 5736 transitions. [2021-06-05 18:21:59,288 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 5736 transitions. Word has length 100 [2021-06-05 18:21:59,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:59,288 INFO L482 AbstractCegarLoop]: Abstraction has 2119 states and 5736 transitions. [2021-06-05 18:21:59,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.818181818181818) internal successors, (128), 22 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:59,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 5736 transitions. [2021-06-05 18:21:59,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:21:59,290 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:59,290 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:59,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:59,490 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:59,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:59,491 INFO L82 PathProgramCache]: Analyzing trace with hash 381501940, now seen corresponding path program 87 times [2021-06-05 18:21:59,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:59,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328162977] [2021-06-05 18:21:59,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:59,626 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:59,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:59,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328162977] [2021-06-05 18:21:59,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328162977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:59,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227350826] [2021-06-05 18:21:59,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:59,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 18:21:59,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:59,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:21:59,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:59,798 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:59,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227350826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:59,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:59,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 18:21:59,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457610339] [2021-06-05 18:21:59,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:21:59,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:59,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:21:59,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:21:59,798 INFO L87 Difference]: Start difference. First operand 2119 states and 5736 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:00,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:00,037 INFO L93 Difference]: Finished difference Result 3646 states and 9047 transitions. [2021-06-05 18:22:00,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:22:00,037 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 18:22:00,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:00,040 INFO L225 Difference]: With dead ends: 3646 [2021-06-05 18:22:00,040 INFO L226 Difference]: Without dead ends: 3376 [2021-06-05 18:22:00,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 266.6ms TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:22:00,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2021-06-05 18:22:00,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 2263. [2021-06-05 18:22:00,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 2.720159151193634) internal successors, (6153), 2262 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:00,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6153 transitions. [2021-06-05 18:22:00,062 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6153 transitions. Word has length 100 [2021-06-05 18:22:00,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:00,062 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6153 transitions. [2021-06-05 18:22:00,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:00,062 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6153 transitions. [2021-06-05 18:22:00,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:22:00,064 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:00,064 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:00,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:00,272 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:00,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:00,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1021160164, now seen corresponding path program 88 times [2021-06-05 18:22:00,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:00,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855761202] [2021-06-05 18:22:00,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:00,422 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:00,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:00,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855761202] [2021-06-05 18:22:00,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855761202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:00,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372628865] [2021-06-05 18:22:00,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:00,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:22:00,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:00,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:22:00,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:00,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372628865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:00,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:00,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 18:22:00,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924340381] [2021-06-05 18:22:00,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:22:00,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:00,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:22:00,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:22:00,613 INFO L87 Difference]: Start difference. First operand 2263 states and 6153 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:00,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:00,904 INFO L93 Difference]: Finished difference Result 3606 states and 9042 transitions. [2021-06-05 18:22:00,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:22:00,905 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 18:22:00,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:00,908 INFO L225 Difference]: With dead ends: 3606 [2021-06-05 18:22:00,908 INFO L226 Difference]: Without dead ends: 3336 [2021-06-05 18:22:00,908 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 321.0ms TimeCoverageRelationStatistics Valid=389, Invalid=1171, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:22:00,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-06-05 18:22:00,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2338. [2021-06-05 18:22:00,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2338 states, 2337 states have (on average 2.729139922978177) internal successors, (6378), 2337 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:00,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 6378 transitions. [2021-06-05 18:22:00,931 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 6378 transitions. Word has length 100 [2021-06-05 18:22:00,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:00,932 INFO L482 AbstractCegarLoop]: Abstraction has 2338 states and 6378 transitions. [2021-06-05 18:22:00,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:00,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 6378 transitions. [2021-06-05 18:22:00,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:22:00,933 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:00,933 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:01,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 18:22:01,134 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:01,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:01,134 INFO L82 PathProgramCache]: Analyzing trace with hash 246241138, now seen corresponding path program 89 times [2021-06-05 18:22:01,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:01,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733093631] [2021-06-05 18:22:01,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:01,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:01,275 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:01,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:01,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733093631] [2021-06-05 18:22:01,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733093631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:01,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863693125] [2021-06-05 18:22:01,275 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:01,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 18:22:01,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:01,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:22:01,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:01,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863693125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:01,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:01,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 18:22:01,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466352458] [2021-06-05 18:22:01,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:22:01,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:01,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:22:01,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:22:01,461 INFO L87 Difference]: Start difference. First operand 2338 states and 6378 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:01,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:01,727 INFO L93 Difference]: Finished difference Result 3656 states and 9217 transitions. [2021-06-05 18:22:01,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:22:01,727 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 18:22:01,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:01,730 INFO L225 Difference]: With dead ends: 3656 [2021-06-05 18:22:01,730 INFO L226 Difference]: Without dead ends: 3386 [2021-06-05 18:22:01,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 283.7ms TimeCoverageRelationStatistics Valid=345, Invalid=1061, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:22:01,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2021-06-05 18:22:01,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 2413. [2021-06-05 18:22:01,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2413 states, 2412 states have (on average 2.737562189054726) internal successors, (6603), 2412 states have internal predecessors, (6603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:01,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 6603 transitions. [2021-06-05 18:22:01,754 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 6603 transitions. Word has length 100 [2021-06-05 18:22:01,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:01,754 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 6603 transitions. [2021-06-05 18:22:01,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:01,754 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 6603 transitions. [2021-06-05 18:22:01,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:22:01,756 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:01,756 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:01,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:01,957 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:01,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:01,957 INFO L82 PathProgramCache]: Analyzing trace with hash -207672222, now seen corresponding path program 90 times [2021-06-05 18:22:01,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:01,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926905448] [2021-06-05 18:22:01,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:02,101 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:02,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:02,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926905448] [2021-06-05 18:22:02,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926905448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:02,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977774289] [2021-06-05 18:22:02,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:02,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 18:22:02,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:02,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:22:02,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:02,292 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:02,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977774289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:02,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:02,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 18:22:02,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114221229] [2021-06-05 18:22:02,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:22:02,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:02,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:22:02,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:22:02,293 INFO L87 Difference]: Start difference. First operand 2413 states and 6603 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:02,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:02,649 INFO L93 Difference]: Finished difference Result 3681 states and 9342 transitions. [2021-06-05 18:22:02,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:22:02,649 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 18:22:02,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:02,653 INFO L225 Difference]: With dead ends: 3681 [2021-06-05 18:22:02,653 INFO L226 Difference]: Without dead ends: 3411 [2021-06-05 18:22:02,653 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 376.1ms TimeCoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:22:02,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2021-06-05 18:22:02,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 2488. [2021-06-05 18:22:02,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.7454764776839564) internal successors, (6828), 2487 states have internal predecessors, (6828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:02,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6828 transitions. [2021-06-05 18:22:02,677 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6828 transitions. Word has length 100 [2021-06-05 18:22:02,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:02,678 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6828 transitions. [2021-06-05 18:22:02,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:02,678 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6828 transitions. [2021-06-05 18:22:02,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:22:02,679 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:02,679 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:02,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 18:22:02,880 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:02,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:02,880 INFO L82 PathProgramCache]: Analyzing trace with hash 670339696, now seen corresponding path program 91 times [2021-06-05 18:22:02,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:02,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26216869] [2021-06-05 18:22:02,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:02,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:02,993 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:02,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:02,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26216869] [2021-06-05 18:22:02,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26216869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:02,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125138176] [2021-06-05 18:22:02,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:03,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:22:03,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:03,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125138176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:03,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:03,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 18:22:03,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908504296] [2021-06-05 18:22:03,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:22:03,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:03,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:22:03,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:22:03,153 INFO L87 Difference]: Start difference. First operand 2488 states and 6828 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:03,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:03,449 INFO L93 Difference]: Finished difference Result 3706 states and 9467 transitions. [2021-06-05 18:22:03,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:22:03,449 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 18:22:03,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:03,453 INFO L225 Difference]: With dead ends: 3706 [2021-06-05 18:22:03,453 INFO L226 Difference]: Without dead ends: 3436 [2021-06-05 18:22:03,453 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 290.2ms TimeCoverageRelationStatistics Valid=372, Invalid=1188, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:22:03,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3436 states. [2021-06-05 18:22:03,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3436 to 2563. [2021-06-05 18:22:03,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2562 states have (on average 2.752927400468384) internal successors, (7053), 2562 states have internal predecessors, (7053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:03,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7053 transitions. [2021-06-05 18:22:03,484 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7053 transitions. Word has length 100 [2021-06-05 18:22:03,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:03,484 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7053 transitions. [2021-06-05 18:22:03,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:03,484 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7053 transitions. [2021-06-05 18:22:03,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:22:03,486 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:03,486 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:03,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:03,703 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:03,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:03,703 INFO L82 PathProgramCache]: Analyzing trace with hash -229715104, now seen corresponding path program 92 times [2021-06-05 18:22:03,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:03,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067453894] [2021-06-05 18:22:03,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:03,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:03,830 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:03,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:03,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067453894] [2021-06-05 18:22:03,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067453894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:03,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885040608] [2021-06-05 18:22:03,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:03,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:22:03,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:03,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:22:03,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:04,009 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:04,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885040608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:04,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:04,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 18:22:04,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844032867] [2021-06-05 18:22:04,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:22:04,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:04,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:22:04,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:22:04,010 INFO L87 Difference]: Start difference. First operand 2563 states and 7053 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:04,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:04,425 INFO L93 Difference]: Finished difference Result 3731 states and 9592 transitions. [2021-06-05 18:22:04,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:22:04,425 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 18:22:04,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:04,428 INFO L225 Difference]: With dead ends: 3731 [2021-06-05 18:22:04,428 INFO L226 Difference]: Without dead ends: 3461 [2021-06-05 18:22:04,429 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 402.4ms TimeCoverageRelationStatistics Valid=443, Invalid=1449, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:22:04,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3461 states. [2021-06-05 18:22:04,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3461 to 2638. [2021-06-05 18:22:04,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2638 states, 2637 states have (on average 2.7599544937428897) internal successors, (7278), 2637 states have internal predecessors, (7278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:04,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 7278 transitions. [2021-06-05 18:22:04,455 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 7278 transitions. Word has length 100 [2021-06-05 18:22:04,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:04,455 INFO L482 AbstractCegarLoop]: Abstraction has 2638 states and 7278 transitions. [2021-06-05 18:22:04,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:04,455 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 7278 transitions. [2021-06-05 18:22:04,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:22:04,457 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:04,457 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:04,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 18:22:04,658 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:04,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:04,658 INFO L82 PathProgramCache]: Analyzing trace with hash -658779410, now seen corresponding path program 93 times [2021-06-05 18:22:04,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:04,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595657191] [2021-06-05 18:22:04,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:04,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:04,766 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:04,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:04,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595657191] [2021-06-05 18:22:04,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595657191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:04,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591337284] [2021-06-05 18:22:04,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:04,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 18:22:04,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:04,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:22:04,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:04,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591337284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:04,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:04,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 18:22:04,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503934178] [2021-06-05 18:22:04,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:22:04,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:04,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:22:04,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:22:04,924 INFO L87 Difference]: Start difference. First operand 2638 states and 7278 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:05,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:05,252 INFO L93 Difference]: Finished difference Result 3756 states and 9717 transitions. [2021-06-05 18:22:05,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:22:05,253 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 18:22:05,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:05,256 INFO L225 Difference]: With dead ends: 3756 [2021-06-05 18:22:05,256 INFO L226 Difference]: Without dead ends: 3486 [2021-06-05 18:22:05,256 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 309.7ms TimeCoverageRelationStatistics Valid=415, Invalid=1307, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:22:05,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3486 states. [2021-06-05 18:22:05,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3486 to 2713. [2021-06-05 18:22:05,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 2.7665929203539825) internal successors, (7503), 2712 states have internal predecessors, (7503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:05,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7503 transitions. [2021-06-05 18:22:05,284 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7503 transitions. Word has length 100 [2021-06-05 18:22:05,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:05,284 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7503 transitions. [2021-06-05 18:22:05,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:05,284 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7503 transitions. [2021-06-05 18:22:05,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:22:05,286 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:05,286 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:05,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 18:22:05,487 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:05,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:05,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1344962594, now seen corresponding path program 94 times [2021-06-05 18:22:05,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:05,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359971775] [2021-06-05 18:22:05,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:05,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:05,613 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:05,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:05,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359971775] [2021-06-05 18:22:05,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359971775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:05,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787981221] [2021-06-05 18:22:05,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:05,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:22:05,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:05,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:22:05,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:05,792 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:05,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787981221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:05,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:05,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 18:22:05,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636279042] [2021-06-05 18:22:05,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:22:05,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:05,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:22:05,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:22:05,793 INFO L87 Difference]: Start difference. First operand 2713 states and 7503 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:06,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:06,247 INFO L93 Difference]: Finished difference Result 3781 states and 9842 transitions. [2021-06-05 18:22:06,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:22:06,247 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 18:22:06,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:06,250 INFO L225 Difference]: With dead ends: 3781 [2021-06-05 18:22:06,250 INFO L226 Difference]: Without dead ends: 3511 [2021-06-05 18:22:06,250 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 426.1ms TimeCoverageRelationStatistics Valid=494, Invalid=1576, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:22:06,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3511 states. [2021-06-05 18:22:06,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3511 to 2788. [2021-06-05 18:22:06,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2788 states, 2787 states have (on average 2.772874058127018) internal successors, (7728), 2787 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:06,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7728 transitions. [2021-06-05 18:22:06,278 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7728 transitions. Word has length 100 [2021-06-05 18:22:06,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:06,278 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7728 transitions. [2021-06-05 18:22:06,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:06,278 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7728 transitions. [2021-06-05 18:22:06,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:22:06,280 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:06,280 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:06,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 18:22:06,480 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:06,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:06,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1429997332, now seen corresponding path program 95 times [2021-06-05 18:22:06,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:06,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609514279] [2021-06-05 18:22:06,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:06,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:06,605 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:06,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:06,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609514279] [2021-06-05 18:22:06,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609514279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:06,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406340197] [2021-06-05 18:22:06,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:06,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 18:22:06,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:06,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:22:06,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:06,770 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:06,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406340197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:06,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:06,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 18:22:06,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211273935] [2021-06-05 18:22:06,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:22:06,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:06,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:22:06,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:22:06,771 INFO L87 Difference]: Start difference. First operand 2788 states and 7728 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:07,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:07,187 INFO L93 Difference]: Finished difference Result 3806 states and 9967 transitions. [2021-06-05 18:22:07,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:22:07,187 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 18:22:07,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:07,191 INFO L225 Difference]: With dead ends: 3806 [2021-06-05 18:22:07,191 INFO L226 Difference]: Without dead ends: 3536 [2021-06-05 18:22:07,191 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 370.5ms TimeCoverageRelationStatistics Valid=474, Invalid=1418, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:22:07,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3536 states. [2021-06-05 18:22:07,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3536 to 2863. [2021-06-05 18:22:07,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 2.7788259958071277) internal successors, (7953), 2862 states have internal predecessors, (7953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:07,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7953 transitions. [2021-06-05 18:22:07,222 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7953 transitions. Word has length 100 [2021-06-05 18:22:07,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:07,222 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 7953 transitions. [2021-06-05 18:22:07,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:07,222 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7953 transitions. [2021-06-05 18:22:07,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:22:07,224 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:07,224 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:07,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:07,425 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:07,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:07,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1498148388, now seen corresponding path program 96 times [2021-06-05 18:22:07,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:07,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405083228] [2021-06-05 18:22:07,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:07,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:07,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:07,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405083228] [2021-06-05 18:22:07,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405083228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:07,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704348936] [2021-06-05 18:22:07,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:07,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 18:22:07,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:07,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:22:07,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:07,719 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:07,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704348936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:07,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:07,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 18:22:07,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830811585] [2021-06-05 18:22:07,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:22:07,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:07,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:22:07,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:22:07,719 INFO L87 Difference]: Start difference. First operand 2863 states and 7953 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:08,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:08,177 INFO L93 Difference]: Finished difference Result 3831 states and 10092 transitions. [2021-06-05 18:22:08,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:22:08,178 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 18:22:08,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:08,181 INFO L225 Difference]: With dead ends: 3831 [2021-06-05 18:22:08,181 INFO L226 Difference]: Without dead ends: 3561 [2021-06-05 18:22:08,182 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 424.3ms TimeCoverageRelationStatistics Valid=476, Invalid=1594, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:22:08,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2021-06-05 18:22:08,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 2938. [2021-06-05 18:22:08,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 2.7844739530132787) internal successors, (8178), 2937 states have internal predecessors, (8178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:08,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 8178 transitions. [2021-06-05 18:22:08,229 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 8178 transitions. Word has length 100 [2021-06-05 18:22:08,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:08,229 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 8178 transitions. [2021-06-05 18:22:08,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:08,229 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 8178 transitions. [2021-06-05 18:22:08,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:22:08,231 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:08,231 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:08,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 18:22:08,432 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:08,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:08,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1499849834, now seen corresponding path program 97 times [2021-06-05 18:22:08,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:08,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871399613] [2021-06-05 18:22:08,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:08,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:08,539 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:08,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:08,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871399613] [2021-06-05 18:22:08,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871399613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:08,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388075279] [2021-06-05 18:22:08,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:08,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:08,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:22:08,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:08,700 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:08,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388075279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:08,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:08,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 18:22:08,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107678033] [2021-06-05 18:22:08,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:22:08,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:08,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:22:08,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:22:08,701 INFO L87 Difference]: Start difference. First operand 2938 states and 8178 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:09,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:09,099 INFO L93 Difference]: Finished difference Result 3856 states and 10217 transitions. [2021-06-05 18:22:09,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:22:09,100 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 18:22:09,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:09,103 INFO L225 Difference]: With dead ends: 3856 [2021-06-05 18:22:09,103 INFO L226 Difference]: Without dead ends: 3586 [2021-06-05 18:22:09,103 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 365.7ms TimeCoverageRelationStatistics Valid=549, Invalid=1521, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:22:09,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2021-06-05 18:22:09,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 3013. [2021-06-05 18:22:09,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3013 states, 3012 states have (on average 2.789840637450199) internal successors, (8403), 3012 states have internal predecessors, (8403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:09,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 8403 transitions. [2021-06-05 18:22:09,134 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 8403 transitions. Word has length 100 [2021-06-05 18:22:09,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:09,134 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 8403 transitions. [2021-06-05 18:22:09,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:09,134 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 8403 transitions. [2021-06-05 18:22:09,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:22:09,136 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:09,136 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:09,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:09,339 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:09,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:09,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1929603418, now seen corresponding path program 98 times [2021-06-05 18:22:09,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:09,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103817112] [2021-06-05 18:22:09,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:09,452 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:09,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:09,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103817112] [2021-06-05 18:22:09,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103817112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:09,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908253603] [2021-06-05 18:22:09,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:09,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:22:09,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:09,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:22:09,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:09,632 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:09,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908253603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:09,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:09,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 18:22:09,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385011416] [2021-06-05 18:22:09,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:22:09,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:09,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:22:09,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:22:09,633 INFO L87 Difference]: Start difference. First operand 3013 states and 8403 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:10,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:10,165 INFO L93 Difference]: Finished difference Result 3941 states and 10507 transitions. [2021-06-05 18:22:10,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:22:10,166 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 18:22:10,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:10,169 INFO L225 Difference]: With dead ends: 3941 [2021-06-05 18:22:10,169 INFO L226 Difference]: Without dead ends: 3671 [2021-06-05 18:22:10,170 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 494.7ms TimeCoverageRelationStatistics Valid=644, Invalid=1806, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 18:22:10,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3671 states. [2021-06-05 18:22:10,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3671 to 3088. [2021-06-05 18:22:10,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 2.801425332037577) internal successors, (8648), 3087 states have internal predecessors, (8648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:10,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 8648 transitions. [2021-06-05 18:22:10,217 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 8648 transitions. Word has length 100 [2021-06-05 18:22:10,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:10,217 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 8648 transitions. [2021-06-05 18:22:10,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:10,217 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 8648 transitions. [2021-06-05 18:22:10,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:22:10,219 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:10,219 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:10,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 18:22:10,424 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:10,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:10,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1871869288, now seen corresponding path program 99 times [2021-06-05 18:22:10,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:10,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787545847] [2021-06-05 18:22:10,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:10,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:10,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:10,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787545847] [2021-06-05 18:22:10,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787545847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:10,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273924525] [2021-06-05 18:22:10,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:10,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 18:22:10,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:10,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:22:10,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:10,710 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:10,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273924525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:10,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:10,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 18:22:10,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731854159] [2021-06-05 18:22:10,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:22:10,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:10,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:22:10,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:22:10,711 INFO L87 Difference]: Start difference. First operand 3088 states and 8648 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:11,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:11,139 INFO L93 Difference]: Finished difference Result 4708 states and 12681 transitions. [2021-06-05 18:22:11,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:22:11,140 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 18:22:11,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:11,144 INFO L225 Difference]: With dead ends: 4708 [2021-06-05 18:22:11,144 INFO L226 Difference]: Without dead ends: 4438 [2021-06-05 18:22:11,144 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 392.0ms TimeCoverageRelationStatistics Valid=641, Invalid=1615, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:22:11,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2021-06-05 18:22:11,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 3268. [2021-06-05 18:22:11,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3268 states, 3267 states have (on average 2.8181818181818183) internal successors, (9207), 3267 states have internal predecessors, (9207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:11,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3268 states to 3268 states and 9207 transitions. [2021-06-05 18:22:11,177 INFO L78 Accepts]: Start accepts. Automaton has 3268 states and 9207 transitions. Word has length 100 [2021-06-05 18:22:11,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:11,177 INFO L482 AbstractCegarLoop]: Abstraction has 3268 states and 9207 transitions. [2021-06-05 18:22:11,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:11,177 INFO L276 IsEmpty]: Start isEmpty. Operand 3268 states and 9207 transitions. [2021-06-05 18:22:11,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:22:11,179 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:11,179 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:11,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:11,380 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:11,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:11,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1894212538, now seen corresponding path program 100 times [2021-06-05 18:22:11,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:11,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485148881] [2021-06-05 18:22:11,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:11,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:11,499 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:11,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:11,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485148881] [2021-06-05 18:22:11,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485148881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:11,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103159602] [2021-06-05 18:22:11,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:11,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:22:11,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:11,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:22:11,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:11,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103159602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:11,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:11,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:22:11,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044964942] [2021-06-05 18:22:11,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:22:11,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:11,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:22:11,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:22:11,675 INFO L87 Difference]: Start difference. First operand 3268 states and 9207 transitions. Second operand has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:12,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:12,318 INFO L93 Difference]: Finished difference Result 4651 states and 12541 transitions. [2021-06-05 18:22:12,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:22:12,318 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 18:22:12,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:12,322 INFO L225 Difference]: With dead ends: 4651 [2021-06-05 18:22:12,322 INFO L226 Difference]: Without dead ends: 4076 [2021-06-05 18:22:12,322 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 601.9ms TimeCoverageRelationStatistics Valid=804, Invalid=2276, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 18:22:12,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-05 18:22:12,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3303. [2021-06-05 18:22:12,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:12,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:22:12,351 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 100 [2021-06-05 18:22:12,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:12,351 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:22:12,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:12,352 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:22:12,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:22:12,353 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:12,354 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:12,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:12,554 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:12,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:12,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1987209659, now seen corresponding path program 101 times [2021-06-05 18:22:12,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:12,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598696521] [2021-06-05 18:22:12,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:12,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:12,696 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:12,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:12,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598696521] [2021-06-05 18:22:12,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598696521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:12,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990391583] [2021-06-05 18:22:12,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:12,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 18:22:12,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:12,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:22:12,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:12,898 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:12,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990391583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:12,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:12,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 18:22:12,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415960658] [2021-06-05 18:22:12,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:22:12,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:12,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:22:12,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:22:12,899 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:13,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:13,184 INFO L93 Difference]: Finished difference Result 4346 states and 11497 transitions. [2021-06-05 18:22:13,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:22:13,184 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-05 18:22:13,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:13,188 INFO L225 Difference]: With dead ends: 4346 [2021-06-05 18:22:13,188 INFO L226 Difference]: Without dead ends: 4076 [2021-06-05 18:22:13,188 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 318.3ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:22:13,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-05 18:22:13,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3303. [2021-06-05 18:22:13,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:13,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:22:13,218 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 18:22:13,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:13,218 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:22:13,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:13,218 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:22:13,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:22:13,220 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:13,220 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:13,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-05 18:22:13,421 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:13,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:13,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1347551435, now seen corresponding path program 102 times [2021-06-05 18:22:13,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:13,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803097177] [2021-06-05 18:22:13,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:13,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:13,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:13,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803097177] [2021-06-05 18:22:13,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803097177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:13,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57224162] [2021-06-05 18:22:13,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:13,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 18:22:13,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:13,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:22:13,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:13,786 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:13,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57224162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:13,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:13,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:22:13,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225729326] [2021-06-05 18:22:13,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:22:13,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:13,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:22:13,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:22:13,787 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:14,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:14,117 INFO L93 Difference]: Finished difference Result 4641 states and 12087 transitions. [2021-06-05 18:22:14,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:22:14,118 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-05 18:22:14,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:14,121 INFO L225 Difference]: With dead ends: 4641 [2021-06-05 18:22:14,121 INFO L226 Difference]: Without dead ends: 4371 [2021-06-05 18:22:14,122 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 377.6ms TimeCoverageRelationStatistics Valid=465, Invalid=1427, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:22:14,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2021-06-05 18:22:14,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 3303. [2021-06-05 18:22:14,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:14,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:22:14,167 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 18:22:14,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:14,167 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:22:14,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:14,167 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:22:14,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:22:14,169 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:14,169 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:14,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:14,370 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:14,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:14,370 INFO L82 PathProgramCache]: Analyzing trace with hash -2122470461, now seen corresponding path program 103 times [2021-06-05 18:22:14,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:14,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252911311] [2021-06-05 18:22:14,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:14,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:14,506 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:14,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:14,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252911311] [2021-06-05 18:22:14,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252911311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:14,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136494108] [2021-06-05 18:22:14,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:14,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:14,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:22:14,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:14,692 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:14,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136494108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:14,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:14,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 18:22:14,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039266989] [2021-06-05 18:22:14,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:22:14,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:14,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:22:14,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:22:14,693 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:15,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:15,021 INFO L93 Difference]: Finished difference Result 4596 states and 11997 transitions. [2021-06-05 18:22:15,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:22:15,021 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-05 18:22:15,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:15,025 INFO L225 Difference]: With dead ends: 4596 [2021-06-05 18:22:15,025 INFO L226 Difference]: Without dead ends: 4326 [2021-06-05 18:22:15,026 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 345.3ms TimeCoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:22:15,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-06-05 18:22:15,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 3303. [2021-06-05 18:22:15,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:15,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:22:15,057 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 18:22:15,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:15,057 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:22:15,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:15,057 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:22:15,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:22:15,059 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:15,059 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:15,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:15,259 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:15,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:15,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1718583475, now seen corresponding path program 104 times [2021-06-05 18:22:15,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:15,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799859864] [2021-06-05 18:22:15,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:15,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:15,419 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:15,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:15,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799859864] [2021-06-05 18:22:15,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799859864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:15,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038756590] [2021-06-05 18:22:15,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:15,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:22:15,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:15,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:22:15,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:15,622 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:15,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038756590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:15,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:15,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:22:15,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386329759] [2021-06-05 18:22:15,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:22:15,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:15,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:22:15,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:22:15,622 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:16,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:16,009 INFO L93 Difference]: Finished difference Result 4546 states and 11897 transitions. [2021-06-05 18:22:16,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:22:16,010 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-05 18:22:16,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:16,014 INFO L225 Difference]: With dead ends: 4546 [2021-06-05 18:22:16,014 INFO L226 Difference]: Without dead ends: 4276 [2021-06-05 18:22:16,015 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 407.5ms TimeCoverageRelationStatistics Valid=490, Invalid=1580, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:22:16,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4276 states. [2021-06-05 18:22:16,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4276 to 3303. [2021-06-05 18:22:16,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:16,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:22:16,048 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 18:22:16,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:16,048 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:22:16,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:16,048 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:22:16,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:22:16,050 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:16,050 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:16,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 18:22:16,250 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:16,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:16,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1698371903, now seen corresponding path program 105 times [2021-06-05 18:22:16,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:16,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441334091] [2021-06-05 18:22:16,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:16,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:16,398 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:16,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:16,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441334091] [2021-06-05 18:22:16,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441334091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:16,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127044223] [2021-06-05 18:22:16,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:16,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 18:22:16,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:16,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:22:16,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:16,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127044223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:16,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:16,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 18:22:16,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046713500] [2021-06-05 18:22:16,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:22:16,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:16,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:22:16,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:22:16,585 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:16,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:16,941 INFO L93 Difference]: Finished difference Result 4496 states and 11797 transitions. [2021-06-05 18:22:16,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:22:16,941 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-05 18:22:16,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:16,946 INFO L225 Difference]: With dead ends: 4496 [2021-06-05 18:22:16,946 INFO L226 Difference]: Without dead ends: 4226 [2021-06-05 18:22:16,946 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 362.8ms TimeCoverageRelationStatistics Valid=506, Invalid=1564, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:22:16,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-06-05 18:22:16,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3303. [2021-06-05 18:22:16,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:16,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:22:16,979 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 18:22:16,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:16,979 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:22:16,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:16,979 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:22:16,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:22:16,981 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:16,981 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:17,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 18:22:17,182 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:17,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:17,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1696540593, now seen corresponding path program 106 times [2021-06-05 18:22:17,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:17,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126425227] [2021-06-05 18:22:17,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:17,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:17,319 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:17,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:17,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126425227] [2021-06-05 18:22:17,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126425227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:17,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83583087] [2021-06-05 18:22:17,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:17,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:22:17,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:17,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:22:17,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:17,510 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:17,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83583087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:17,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:17,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:22:17,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056278520] [2021-06-05 18:22:17,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:22:17,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:17,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:22:17,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:22:17,511 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:17,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:17,945 INFO L93 Difference]: Finished difference Result 4446 states and 11697 transitions. [2021-06-05 18:22:17,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:22:17,946 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-05 18:22:17,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:17,950 INFO L225 Difference]: With dead ends: 4446 [2021-06-05 18:22:17,950 INFO L226 Difference]: Without dead ends: 4176 [2021-06-05 18:22:17,950 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 440.4ms TimeCoverageRelationStatistics Valid=531, Invalid=1725, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:22:17,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-06-05 18:22:17,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 3303. [2021-06-05 18:22:17,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:17,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:22:17,981 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 18:22:17,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:17,981 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:22:17,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:17,981 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:22:17,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:22:17,983 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:17,983 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:18,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 18:22:18,184 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:18,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:18,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1267476287, now seen corresponding path program 107 times [2021-06-05 18:22:18,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:18,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49217239] [2021-06-05 18:22:18,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:18,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:18,329 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:18,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:18,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49217239] [2021-06-05 18:22:18,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49217239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:18,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158106451] [2021-06-05 18:22:18,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:18,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 18:22:18,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:18,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:22:18,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:18,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158106451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:18,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:18,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 18:22:18,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834878055] [2021-06-05 18:22:18,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:22:18,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:18,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:22:18,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:22:18,519 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:18,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:18,896 INFO L93 Difference]: Finished difference Result 4396 states and 11597 transitions. [2021-06-05 18:22:18,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:22:18,897 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-05 18:22:18,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:18,901 INFO L225 Difference]: With dead ends: 4396 [2021-06-05 18:22:18,901 INFO L226 Difference]: Without dead ends: 4126 [2021-06-05 18:22:18,901 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 374.9ms TimeCoverageRelationStatistics Valid=561, Invalid=1695, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:22:18,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-06-05 18:22:18,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 3303. [2021-06-05 18:22:18,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:18,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:22:18,933 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 18:22:18,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:18,933 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:22:18,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:18,933 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:22:18,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:22:18,935 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:18,935 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:19,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:19,136 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:19,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:19,137 INFO L82 PathProgramCache]: Analyzing trace with hash 581293103, now seen corresponding path program 108 times [2021-06-05 18:22:19,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:19,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095684747] [2021-06-05 18:22:19,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:19,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:19,266 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:19,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:19,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095684747] [2021-06-05 18:22:19,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095684747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:19,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457037586] [2021-06-05 18:22:19,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:19,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 18:22:19,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:19,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:22:19,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:19,462 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:19,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457037586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:19,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:19,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:22:19,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312041888] [2021-06-05 18:22:19,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:22:19,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:19,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:22:19,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:22:19,463 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:19,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:19,946 INFO L93 Difference]: Finished difference Result 4346 states and 11497 transitions. [2021-06-05 18:22:19,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:22:19,947 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-05 18:22:19,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:19,950 INFO L225 Difference]: With dead ends: 4346 [2021-06-05 18:22:19,950 INFO L226 Difference]: Without dead ends: 4076 [2021-06-05 18:22:19,951 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 464.7ms TimeCoverageRelationStatistics Valid=588, Invalid=1862, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 18:22:19,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-05 18:22:19,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3303. [2021-06-05 18:22:19,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:20,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:22:20,000 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 18:22:20,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:20,000 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:22:20,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:20,001 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:22:20,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:22:20,003 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:20,003 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:20,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 18:22:20,205 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:20,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:20,205 INFO L82 PathProgramCache]: Analyzing trace with hash 496258365, now seen corresponding path program 109 times [2021-06-05 18:22:20,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:20,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302292802] [2021-06-05 18:22:20,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:20,322 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:20,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:20,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302292802] [2021-06-05 18:22:20,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302292802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:20,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339065461] [2021-06-05 18:22:20,323 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:20,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:20,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:22:20,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:20,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339065461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:20,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:20,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 18:22:20,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755119211] [2021-06-05 18:22:20,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:22:20,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:20,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:22:20,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:22:20,512 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:20,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:20,929 INFO L93 Difference]: Finished difference Result 4296 states and 11397 transitions. [2021-06-05 18:22:20,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:22:20,929 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-05 18:22:20,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:20,933 INFO L225 Difference]: With dead ends: 4296 [2021-06-05 18:22:20,933 INFO L226 Difference]: Without dead ends: 4026 [2021-06-05 18:22:20,933 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 391.8ms TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 18:22:20,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-06-05 18:22:20,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 3303. [2021-06-05 18:22:20,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:20,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:22:20,963 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 18:22:20,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:20,963 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:22:20,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:20,963 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:22:20,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:22:20,965 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:20,965 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:21,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 18:22:21,166 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:21,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:21,166 INFO L82 PathProgramCache]: Analyzing trace with hash 428107309, now seen corresponding path program 110 times [2021-06-05 18:22:21,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:21,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053041368] [2021-06-05 18:22:21,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:21,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:21,303 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:21,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:21,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053041368] [2021-06-05 18:22:21,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053041368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:21,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394657961] [2021-06-05 18:22:21,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:21,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:22:21,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:21,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:22:21,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:21,491 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:21,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394657961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:21,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:21,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:22:21,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468212563] [2021-06-05 18:22:21,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:22:21,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:21,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:22:21,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:22:21,492 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:22,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:22,035 INFO L93 Difference]: Finished difference Result 4246 states and 11297 transitions. [2021-06-05 18:22:22,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:22:22,035 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-05 18:22:22,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:22,038 INFO L225 Difference]: With dead ends: 4246 [2021-06-05 18:22:22,038 INFO L226 Difference]: Without dead ends: 3976 [2021-06-05 18:22:22,038 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 528.2ms TimeCoverageRelationStatistics Valid=661, Invalid=1991, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 18:22:22,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3976 states. [2021-06-05 18:22:22,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3976 to 3303. [2021-06-05 18:22:22,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:22,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:22:22,067 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 18:22:22,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:22,067 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:22:22,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:22,067 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:22:22,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:22:22,069 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:22,069 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:22,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 18:22:22,270 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:22,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:22,270 INFO L82 PathProgramCache]: Analyzing trace with hash -868861765, now seen corresponding path program 111 times [2021-06-05 18:22:22,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:22,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546398698] [2021-06-05 18:22:22,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:22,392 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:22,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:22,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546398698] [2021-06-05 18:22:22,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546398698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:22,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360391495] [2021-06-05 18:22:22,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:22,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 18:22:22,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:22,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:22:22,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:22,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360391495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:22,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:22,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 18:22:22,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913139292] [2021-06-05 18:22:22,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:22:22,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:22,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:22:22,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:22:22,571 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:23,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:23,016 INFO L93 Difference]: Finished difference Result 4196 states and 11197 transitions. [2021-06-05 18:22:23,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:22:23,017 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-05 18:22:23,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:23,020 INFO L225 Difference]: With dead ends: 4196 [2021-06-05 18:22:23,020 INFO L226 Difference]: Without dead ends: 3926 [2021-06-05 18:22:23,021 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 419.8ms TimeCoverageRelationStatistics Valid=719, Invalid=1933, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 18:22:23,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-06-05 18:22:23,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3303. [2021-06-05 18:22:23,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:23,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:22:23,050 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 18:22:23,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:23,050 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:22:23,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:23,050 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:22:23,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:22:23,052 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:23,052 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:23,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:23,261 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:23,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:23,261 INFO L82 PathProgramCache]: Analyzing trace with hash -439108181, now seen corresponding path program 112 times [2021-06-05 18:22:23,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:23,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811115330] [2021-06-05 18:22:23,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:23,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:23,390 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:23,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:23,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811115330] [2021-06-05 18:22:23,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811115330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:23,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777560359] [2021-06-05 18:22:23,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:23,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:22:23,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:23,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:22:23,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:23,585 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:23,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777560359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:23,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:23,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:22:23,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244733274] [2021-06-05 18:22:23,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:22:23,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:23,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:22:23,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:22:23,586 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:24,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:24,160 INFO L93 Difference]: Finished difference Result 4206 states and 11247 transitions. [2021-06-05 18:22:24,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:22:24,161 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-05 18:22:24,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:24,164 INFO L225 Difference]: With dead ends: 4206 [2021-06-05 18:22:24,164 INFO L226 Difference]: Without dead ends: 3936 [2021-06-05 18:22:24,164 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 537.3ms TimeCoverageRelationStatistics Valid=750, Invalid=2112, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 18:22:24,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3936 states. [2021-06-05 18:22:24,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3936 to 3303. [2021-06-05 18:22:24,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.812840702604482) internal successors, (9288), 3302 states have internal predecessors, (9288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:24,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9288 transitions. [2021-06-05 18:22:24,193 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9288 transitions. Word has length 105 [2021-06-05 18:22:24,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:24,193 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9288 transitions. [2021-06-05 18:22:24,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:24,194 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9288 transitions. [2021-06-05 18:22:24,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:22:24,196 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:24,196 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:24,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:24,396 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:24,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:24,396 INFO L82 PathProgramCache]: Analyzing trace with hash -496842311, now seen corresponding path program 113 times [2021-06-05 18:22:24,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:24,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089603439] [2021-06-05 18:22:24,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:24,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:24,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089603439] [2021-06-05 18:22:24,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089603439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:24,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608568898] [2021-06-05 18:22:24,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:24,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 18:22:24,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:24,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:22:24,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:24,684 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:24,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608568898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:24,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:24,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 18:22:24,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756877835] [2021-06-05 18:22:24,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:22:24,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:24,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:22:24,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:22:24,685 INFO L87 Difference]: Start difference. First operand 3303 states and 9288 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:25,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:25,173 INFO L93 Difference]: Finished difference Result 4948 states and 13371 transitions. [2021-06-05 18:22:25,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:22:25,174 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-05 18:22:25,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:25,178 INFO L225 Difference]: With dead ends: 4948 [2021-06-05 18:22:25,178 INFO L226 Difference]: Without dead ends: 4678 [2021-06-05 18:22:25,179 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 446.2ms TimeCoverageRelationStatistics Valid=823, Invalid=2039, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 18:22:25,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4678 states. [2021-06-05 18:22:25,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4678 to 3483. [2021-06-05 18:22:25,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3483 states, 3482 states have (on average 2.827972429638139) internal successors, (9847), 3482 states have internal predecessors, (9847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:25,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3483 states to 3483 states and 9847 transitions. [2021-06-05 18:22:25,217 INFO L78 Accepts]: Start accepts. Automaton has 3483 states and 9847 transitions. Word has length 105 [2021-06-05 18:22:25,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:25,217 INFO L482 AbstractCegarLoop]: Abstraction has 3483 states and 9847 transitions. [2021-06-05 18:22:25,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:25,217 INFO L276 IsEmpty]: Start isEmpty. Operand 3483 states and 9847 transitions. [2021-06-05 18:22:25,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:22:25,219 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:25,219 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:25,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:25,421 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:25,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:25,421 INFO L82 PathProgramCache]: Analyzing trace with hash -474499061, now seen corresponding path program 114 times [2021-06-05 18:22:25,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:25,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714951837] [2021-06-05 18:22:25,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:25,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:25,539 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:25,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:25,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714951837] [2021-06-05 18:22:25,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714951837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:25,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270458054] [2021-06-05 18:22:25,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:25,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 18:22:25,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:25,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:22:25,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:25,725 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:25,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270458054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:25,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:25,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:22:25,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589379842] [2021-06-05 18:22:25,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:22:25,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:25,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:22:25,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:22:25,726 INFO L87 Difference]: Start difference. First operand 3483 states and 9847 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:26,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:26,374 INFO L93 Difference]: Finished difference Result 4816 states and 13036 transitions. [2021-06-05 18:22:26,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:22:26,375 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-05 18:22:26,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:26,379 INFO L225 Difference]: With dead ends: 4816 [2021-06-05 18:22:26,379 INFO L226 Difference]: Without dead ends: 4241 [2021-06-05 18:22:26,379 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 597.5ms TimeCoverageRelationStatistics Valid=830, Invalid=2592, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 18:22:26,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4241 states. [2021-06-05 18:22:26,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4241 to 2324. [2021-06-05 18:22:26,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2324 states, 2323 states have (on average 2.7361170899698664) internal successors, (6356), 2323 states have internal predecessors, (6356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:26,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 6356 transitions. [2021-06-05 18:22:26,404 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 6356 transitions. Word has length 105 [2021-06-05 18:22:26,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:26,404 INFO L482 AbstractCegarLoop]: Abstraction has 2324 states and 6356 transitions. [2021-06-05 18:22:26,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:26,404 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 6356 transitions. [2021-06-05 18:22:26,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:22:26,405 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:26,405 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:26,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 18:22:26,606 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:26,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:26,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1552772481, now seen corresponding path program 115 times [2021-06-05 18:22:26,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:26,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91983675] [2021-06-05 18:22:26,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:26,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:26,770 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:26,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:26,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91983675] [2021-06-05 18:22:26,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91983675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:26,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973767295] [2021-06-05 18:22:26,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:26,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:26,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:22:26,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:26,992 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:26,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973767295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:26,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:26,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 25 [2021-06-05 18:22:26,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558741793] [2021-06-05 18:22:26,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:22:26,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:26,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:22:26,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:22:26,993 INFO L87 Difference]: Start difference. First operand 2324 states and 6356 transitions. Second operand has 25 states, 25 states have (on average 5.6) internal successors, (140), 25 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:27,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:27,373 INFO L93 Difference]: Finished difference Result 3364 states and 8756 transitions. [2021-06-05 18:22:27,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:22:27,374 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.6) internal successors, (140), 25 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:22:27,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:27,377 INFO L225 Difference]: With dead ends: 3364 [2021-06-05 18:22:27,377 INFO L226 Difference]: Without dead ends: 3030 [2021-06-05 18:22:27,377 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 409.8ms TimeCoverageRelationStatistics Valid=572, Invalid=1590, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:22:27,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2021-06-05 18:22:27,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 2409. [2021-06-05 18:22:27,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 2408 states have (on average 2.7101328903654487) internal successors, (6526), 2408 states have internal predecessors, (6526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:27,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 6526 transitions. [2021-06-05 18:22:27,400 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 6526 transitions. Word has length 110 [2021-06-05 18:22:27,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:27,400 INFO L482 AbstractCegarLoop]: Abstraction has 2409 states and 6526 transitions. [2021-06-05 18:22:27,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.6) internal successors, (140), 25 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:27,400 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 6526 transitions. [2021-06-05 18:22:27,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:22:27,401 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:27,402 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:27,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 18:22:27,602 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:27,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:27,602 INFO L82 PathProgramCache]: Analyzing trace with hash 642486821, now seen corresponding path program 116 times [2021-06-05 18:22:27,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:27,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356339696] [2021-06-05 18:22:27,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:27,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:27,761 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:27,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:27,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356339696] [2021-06-05 18:22:27,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356339696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:27,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351889215] [2021-06-05 18:22:27,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:27,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:22:27,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:27,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:22:27,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:27,966 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:27,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351889215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:27,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:27,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 18:22:27,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275216130] [2021-06-05 18:22:27,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:22:27,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:27,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:22:27,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:22:27,966 INFO L87 Difference]: Start difference. First operand 2409 states and 6526 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:28,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:28,264 INFO L93 Difference]: Finished difference Result 4086 states and 10137 transitions. [2021-06-05 18:22:28,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:22:28,264 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:22:28,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:28,268 INFO L225 Difference]: With dead ends: 4086 [2021-06-05 18:22:28,268 INFO L226 Difference]: Without dead ends: 3816 [2021-06-05 18:22:28,268 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 341.4ms TimeCoverageRelationStatistics Valid=446, Invalid=1194, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:22:28,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3816 states. [2021-06-05 18:22:28,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3816 to 2553. [2021-06-05 18:22:28,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2553 states, 2552 states have (on average 2.720611285266458) internal successors, (6943), 2552 states have internal predecessors, (6943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:28,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2553 states to 2553 states and 6943 transitions. [2021-06-05 18:22:28,293 INFO L78 Accepts]: Start accepts. Automaton has 2553 states and 6943 transitions. Word has length 110 [2021-06-05 18:22:28,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:28,293 INFO L482 AbstractCegarLoop]: Abstraction has 2553 states and 6943 transitions. [2021-06-05 18:22:28,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:28,293 INFO L276 IsEmpty]: Start isEmpty. Operand 2553 states and 6943 transitions. [2021-06-05 18:22:28,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:22:28,295 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:28,295 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:28,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 18:22:28,495 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:28,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:28,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1552838891, now seen corresponding path program 117 times [2021-06-05 18:22:28,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:28,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636882581] [2021-06-05 18:22:28,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:28,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:28,653 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:28,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:28,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636882581] [2021-06-05 18:22:28,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636882581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:28,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746869654] [2021-06-05 18:22:28,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:28,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:22:28,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:28,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:22:28,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:28,865 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:28,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746869654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:28,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:28,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:22:28,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715212461] [2021-06-05 18:22:28,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:22:28,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:28,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:22:28,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:22:28,866 INFO L87 Difference]: Start difference. First operand 2553 states and 6943 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:29,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:29,224 INFO L93 Difference]: Finished difference Result 4046 states and 10132 transitions. [2021-06-05 18:22:29,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:22:29,224 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:22:29,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:29,228 INFO L225 Difference]: With dead ends: 4046 [2021-06-05 18:22:29,228 INFO L226 Difference]: Without dead ends: 3776 [2021-06-05 18:22:29,228 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 391.2ms TimeCoverageRelationStatistics Valid=507, Invalid=1473, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:22:29,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3776 states. [2021-06-05 18:22:29,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3776 to 2628. [2021-06-05 18:22:29,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2628 states, 2627 states have (on average 2.7285877426722496) internal successors, (7168), 2627 states have internal predecessors, (7168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:29,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2628 states to 2628 states and 7168 transitions. [2021-06-05 18:22:29,254 INFO L78 Accepts]: Start accepts. Automaton has 2628 states and 7168 transitions. Word has length 110 [2021-06-05 18:22:29,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:29,254 INFO L482 AbstractCegarLoop]: Abstraction has 2628 states and 7168 transitions. [2021-06-05 18:22:29,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:29,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2628 states and 7168 transitions. [2021-06-05 18:22:29,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:22:29,256 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:29,256 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:29,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 18:22:29,456 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:29,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:29,457 INFO L82 PathProgramCache]: Analyzing trace with hash -42638813, now seen corresponding path program 118 times [2021-06-05 18:22:29,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:29,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147327308] [2021-06-05 18:22:29,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:29,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:29,610 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:29,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:29,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147327308] [2021-06-05 18:22:29,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147327308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:29,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792047098] [2021-06-05 18:22:29,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:29,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:22:29,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:29,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:22:29,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:29,798 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:29,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792047098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:29,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:29,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 18:22:29,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036415382] [2021-06-05 18:22:29,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:22:29,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:29,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:22:29,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:22:29,799 INFO L87 Difference]: Start difference. First operand 2628 states and 7168 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:30,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:30,134 INFO L93 Difference]: Finished difference Result 4096 states and 10307 transitions. [2021-06-05 18:22:30,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:22:30,135 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:22:30,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:30,138 INFO L225 Difference]: With dead ends: 4096 [2021-06-05 18:22:30,138 INFO L226 Difference]: Without dead ends: 3826 [2021-06-05 18:22:30,138 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 349.7ms TimeCoverageRelationStatistics Valid=454, Invalid=1352, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:22:30,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3826 states. [2021-06-05 18:22:30,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3826 to 2703. [2021-06-05 18:22:30,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2703 states, 2702 states have (on average 2.736121391561806) internal successors, (7393), 2702 states have internal predecessors, (7393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:30,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2703 states to 2703 states and 7393 transitions. [2021-06-05 18:22:30,164 INFO L78 Accepts]: Start accepts. Automaton has 2703 states and 7393 transitions. Word has length 110 [2021-06-05 18:22:30,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:30,165 INFO L482 AbstractCegarLoop]: Abstraction has 2703 states and 7393 transitions. [2021-06-05 18:22:30,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:30,165 INFO L276 IsEmpty]: Start isEmpty. Operand 2703 states and 7393 transitions. [2021-06-05 18:22:30,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:22:30,166 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:30,166 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:30,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 18:22:30,368 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:30,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:30,368 INFO L82 PathProgramCache]: Analyzing trace with hash 597019411, now seen corresponding path program 119 times [2021-06-05 18:22:30,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:30,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970347799] [2021-06-05 18:22:30,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:30,527 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:30,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:30,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970347799] [2021-06-05 18:22:30,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970347799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:30,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611300873] [2021-06-05 18:22:30,527 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:30,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:22:30,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:30,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:22:30,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:30,740 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:30,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611300873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:30,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:30,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:22:30,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152632625] [2021-06-05 18:22:30,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:22:30,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:30,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:22:30,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:22:30,744 INFO L87 Difference]: Start difference. First operand 2703 states and 7393 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:31,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:31,156 INFO L93 Difference]: Finished difference Result 4121 states and 10432 transitions. [2021-06-05 18:22:31,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:22:31,157 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:22:31,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:31,161 INFO L225 Difference]: With dead ends: 4121 [2021-06-05 18:22:31,161 INFO L226 Difference]: Without dead ends: 3851 [2021-06-05 18:22:31,161 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 429.3ms TimeCoverageRelationStatistics Valid=523, Invalid=1639, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:22:31,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3851 states. [2021-06-05 18:22:31,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3851 to 2778. [2021-06-05 18:22:31,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2778 states, 2777 states have (on average 2.7432481094706516) internal successors, (7618), 2777 states have internal predecessors, (7618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:31,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2778 states to 2778 states and 7618 transitions. [2021-06-05 18:22:31,189 INFO L78 Accepts]: Start accepts. Automaton has 2778 states and 7618 transitions. Word has length 110 [2021-06-05 18:22:31,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:31,189 INFO L482 AbstractCegarLoop]: Abstraction has 2778 states and 7618 transitions. [2021-06-05 18:22:31,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:31,189 INFO L276 IsEmpty]: Start isEmpty. Operand 2778 states and 7618 transitions. [2021-06-05 18:22:31,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:22:31,191 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:31,191 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:31,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:31,392 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:31,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:31,392 INFO L82 PathProgramCache]: Analyzing trace with hash -177899615, now seen corresponding path program 120 times [2021-06-05 18:22:31,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:31,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265051361] [2021-06-05 18:22:31,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:31,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:31,549 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:31,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:31,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265051361] [2021-06-05 18:22:31,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265051361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:31,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146822511] [2021-06-05 18:22:31,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:31,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:22:31,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:31,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:22:31,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:31,743 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:31,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146822511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:31,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:31,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 18:22:31,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002135798] [2021-06-05 18:22:31,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:22:31,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:31,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:22:31,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:22:31,744 INFO L87 Difference]: Start difference. First operand 2778 states and 7618 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:32,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:32,117 INFO L93 Difference]: Finished difference Result 4146 states and 10557 transitions. [2021-06-05 18:22:32,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:22:32,117 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:22:32,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:32,120 INFO L225 Difference]: With dead ends: 4146 [2021-06-05 18:22:32,120 INFO L226 Difference]: Without dead ends: 3876 [2021-06-05 18:22:32,121 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 370.8ms TimeCoverageRelationStatistics Valid=478, Invalid=1502, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:22:32,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3876 states. [2021-06-05 18:22:32,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3876 to 2853. [2021-06-05 18:22:32,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2853 states, 2852 states have (on average 2.75) internal successors, (7843), 2852 states have internal predecessors, (7843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:32,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 7843 transitions. [2021-06-05 18:22:32,148 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 7843 transitions. Word has length 110 [2021-06-05 18:22:32,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:32,148 INFO L482 AbstractCegarLoop]: Abstraction has 2853 states and 7843 transitions. [2021-06-05 18:22:32,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:32,148 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 7843 transitions. [2021-06-05 18:22:32,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:22:32,150 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:32,150 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:32,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 18:22:32,351 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:32,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:32,351 INFO L82 PathProgramCache]: Analyzing trace with hash -631812975, now seen corresponding path program 121 times [2021-06-05 18:22:32,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:32,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934168920] [2021-06-05 18:22:32,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:32,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:32,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934168920] [2021-06-05 18:22:32,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934168920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:32,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660063694] [2021-06-05 18:22:32,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:32,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:32,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:22:32,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:32,699 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:32,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660063694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:32,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:32,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:22:32,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122143957] [2021-06-05 18:22:32,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:22:32,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:32,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:22:32,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:22:32,700 INFO L87 Difference]: Start difference. First operand 2853 states and 7843 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:33,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:33,154 INFO L93 Difference]: Finished difference Result 4171 states and 10682 transitions. [2021-06-05 18:22:33,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:22:33,154 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:22:33,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:33,158 INFO L225 Difference]: With dead ends: 4171 [2021-06-05 18:22:33,158 INFO L226 Difference]: Without dead ends: 3901 [2021-06-05 18:22:33,159 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 467.6ms TimeCoverageRelationStatistics Valid=555, Invalid=1797, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:22:33,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3901 states. [2021-06-05 18:22:33,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3901 to 2928. [2021-06-05 18:22:33,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2928 states, 2927 states have (on average 2.756405876323881) internal successors, (8068), 2927 states have internal predecessors, (8068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:33,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 8068 transitions. [2021-06-05 18:22:33,188 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 8068 transitions. Word has length 110 [2021-06-05 18:22:33,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:33,188 INFO L482 AbstractCegarLoop]: Abstraction has 2928 states and 8068 transitions. [2021-06-05 18:22:33,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:33,188 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 8068 transitions. [2021-06-05 18:22:33,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:22:33,190 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:33,190 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:33,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 18:22:33,409 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:33,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:33,409 INFO L82 PathProgramCache]: Analyzing trace with hash 246198943, now seen corresponding path program 122 times [2021-06-05 18:22:33,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:33,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882949355] [2021-06-05 18:22:33,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:33,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:33,560 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:33,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:33,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882949355] [2021-06-05 18:22:33,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882949355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:33,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802284180] [2021-06-05 18:22:33,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:33,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:22:33,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:33,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:22:33,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:33,766 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:33,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802284180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:33,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:33,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 18:22:33,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574753852] [2021-06-05 18:22:33,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:22:33,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:33,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:22:33,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:22:33,767 INFO L87 Difference]: Start difference. First operand 2928 states and 8068 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:34,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:34,158 INFO L93 Difference]: Finished difference Result 4196 states and 10807 transitions. [2021-06-05 18:22:34,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:22:34,158 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:22:34,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:34,162 INFO L225 Difference]: With dead ends: 4196 [2021-06-05 18:22:34,162 INFO L226 Difference]: Without dead ends: 3926 [2021-06-05 18:22:34,162 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 399.9ms TimeCoverageRelationStatistics Valid=518, Invalid=1644, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:22:34,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-06-05 18:22:34,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3003. [2021-06-05 18:22:34,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 3002 states have (on average 2.762491672218521) internal successors, (8293), 3002 states have internal predecessors, (8293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:34,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 8293 transitions. [2021-06-05 18:22:34,191 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 8293 transitions. Word has length 110 [2021-06-05 18:22:34,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:34,191 INFO L482 AbstractCegarLoop]: Abstraction has 3003 states and 8293 transitions. [2021-06-05 18:22:34,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:34,192 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 8293 transitions. [2021-06-05 18:22:34,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:22:34,193 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:34,194 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:34,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:34,395 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:34,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:34,395 INFO L82 PathProgramCache]: Analyzing trace with hash -653855857, now seen corresponding path program 123 times [2021-06-05 18:22:34,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:34,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042406333] [2021-06-05 18:22:34,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:34,548 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:34,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:34,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042406333] [2021-06-05 18:22:34,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042406333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:34,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875339330] [2021-06-05 18:22:34,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:34,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:22:34,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:34,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:22:34,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:34,745 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:34,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875339330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:34,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:34,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:22:34,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275744524] [2021-06-05 18:22:34,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:22:34,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:34,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:22:34,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:22:34,746 INFO L87 Difference]: Start difference. First operand 3003 states and 8293 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:35,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:35,210 INFO L93 Difference]: Finished difference Result 4221 states and 10932 transitions. [2021-06-05 18:22:35,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:22:35,211 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:22:35,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:35,215 INFO L225 Difference]: With dead ends: 4221 [2021-06-05 18:22:35,215 INFO L226 Difference]: Without dead ends: 3951 [2021-06-05 18:22:35,215 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 464.1ms TimeCoverageRelationStatistics Valid=528, Invalid=1824, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:22:35,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3951 states. [2021-06-05 18:22:35,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3951 to 3078. [2021-06-05 18:22:35,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3078 states, 3077 states have (on average 2.7682807929801756) internal successors, (8518), 3077 states have internal predecessors, (8518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:35,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3078 states to 3078 states and 8518 transitions. [2021-06-05 18:22:35,246 INFO L78 Accepts]: Start accepts. Automaton has 3078 states and 8518 transitions. Word has length 110 [2021-06-05 18:22:35,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:35,246 INFO L482 AbstractCegarLoop]: Abstraction has 3078 states and 8518 transitions. [2021-06-05 18:22:35,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:35,246 INFO L276 IsEmpty]: Start isEmpty. Operand 3078 states and 8518 transitions. [2021-06-05 18:22:35,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:22:35,248 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:35,248 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:35,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:35,449 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:35,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:35,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1082920163, now seen corresponding path program 124 times [2021-06-05 18:22:35,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:35,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671889357] [2021-06-05 18:22:35,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:35,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:35,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:35,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671889357] [2021-06-05 18:22:35,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671889357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:35,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662508872] [2021-06-05 18:22:35,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:35,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:22:35,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:35,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:22:35,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:35,779 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:35,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662508872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:35,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:35,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 18:22:35,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209573548] [2021-06-05 18:22:35,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:22:35,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:35,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:22:35,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:22:35,780 INFO L87 Difference]: Start difference. First operand 3078 states and 8518 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:36,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:36,199 INFO L93 Difference]: Finished difference Result 4246 states and 11057 transitions. [2021-06-05 18:22:36,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:22:36,199 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:22:36,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:36,203 INFO L225 Difference]: With dead ends: 4246 [2021-06-05 18:22:36,203 INFO L226 Difference]: Without dead ends: 3976 [2021-06-05 18:22:36,203 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 425.0ms TimeCoverageRelationStatistics Valid=574, Invalid=1778, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:22:36,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3976 states. [2021-06-05 18:22:36,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3976 to 3153. [2021-06-05 18:22:36,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3153 states, 3152 states have (on average 2.7737944162436547) internal successors, (8743), 3152 states have internal predecessors, (8743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:36,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3153 states to 3153 states and 8743 transitions. [2021-06-05 18:22:36,236 INFO L78 Accepts]: Start accepts. Automaton has 3153 states and 8743 transitions. Word has length 110 [2021-06-05 18:22:36,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:36,236 INFO L482 AbstractCegarLoop]: Abstraction has 3153 states and 8743 transitions. [2021-06-05 18:22:36,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:36,236 INFO L276 IsEmpty]: Start isEmpty. Operand 3153 states and 8743 transitions. [2021-06-05 18:22:36,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:22:36,238 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:36,238 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:36,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:36,438 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:36,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:36,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1769103347, now seen corresponding path program 125 times [2021-06-05 18:22:36,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:36,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53599513] [2021-06-05 18:22:36,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:36,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:36,576 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:36,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:36,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53599513] [2021-06-05 18:22:36,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53599513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:36,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714197010] [2021-06-05 18:22:36,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:36,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:22:36,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:36,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:22:36,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:36,780 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:36,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714197010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:36,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:36,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:22:36,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649103276] [2021-06-05 18:22:36,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:22:36,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:36,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:22:36,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:22:36,781 INFO L87 Difference]: Start difference. First operand 3153 states and 8743 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:37,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:37,330 INFO L93 Difference]: Finished difference Result 4271 states and 11182 transitions. [2021-06-05 18:22:37,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:22:37,331 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:22:37,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:37,335 INFO L225 Difference]: With dead ends: 4271 [2021-06-05 18:22:37,335 INFO L226 Difference]: Without dead ends: 4001 [2021-06-05 18:22:37,335 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 532.4ms TimeCoverageRelationStatistics Valid=667, Invalid=2089, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 18:22:37,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2021-06-05 18:22:37,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 3228. [2021-06-05 18:22:37,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3228 states, 3227 states have (on average 2.779051750852185) internal successors, (8968), 3227 states have internal predecessors, (8968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:37,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3228 states to 3228 states and 8968 transitions. [2021-06-05 18:22:37,371 INFO L78 Accepts]: Start accepts. Automaton has 3228 states and 8968 transitions. Word has length 110 [2021-06-05 18:22:37,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:37,371 INFO L482 AbstractCegarLoop]: Abstraction has 3228 states and 8968 transitions. [2021-06-05 18:22:37,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:37,371 INFO L276 IsEmpty]: Start isEmpty. Operand 3228 states and 8968 transitions. [2021-06-05 18:22:37,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:22:37,373 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:37,373 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:37,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 18:22:37,574 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:37,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:37,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1854138085, now seen corresponding path program 126 times [2021-06-05 18:22:37,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:37,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454684346] [2021-06-05 18:22:37,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:37,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:37,698 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:37,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:37,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454684346] [2021-06-05 18:22:37,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454684346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:37,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834017419] [2021-06-05 18:22:37,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:37,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:22:37,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:37,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:22:37,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:37,917 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:37,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834017419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:37,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:37,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 18:22:37,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710372764] [2021-06-05 18:22:37,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:22:37,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:37,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:22:37,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:22:37,918 INFO L87 Difference]: Start difference. First operand 3228 states and 8968 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:38,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:38,392 INFO L93 Difference]: Finished difference Result 4296 states and 11307 transitions. [2021-06-05 18:22:38,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:22:38,392 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:22:38,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:38,396 INFO L225 Difference]: With dead ends: 4296 [2021-06-05 18:22:38,396 INFO L226 Difference]: Without dead ends: 4026 [2021-06-05 18:22:38,396 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 435.8ms TimeCoverageRelationStatistics Valid=646, Invalid=1904, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 18:22:38,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-06-05 18:22:38,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 3303. [2021-06-05 18:22:38,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.784070260448213) internal successors, (9193), 3302 states have internal predecessors, (9193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:38,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9193 transitions. [2021-06-05 18:22:38,431 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9193 transitions. Word has length 110 [2021-06-05 18:22:38,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:38,431 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9193 transitions. [2021-06-05 18:22:38,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:38,431 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9193 transitions. [2021-06-05 18:22:38,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:22:38,433 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:38,433 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:38,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 18:22:38,640 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:38,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:38,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1922289141, now seen corresponding path program 127 times [2021-06-05 18:22:38,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:38,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080088579] [2021-06-05 18:22:38,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:38,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:38,778 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:38,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:38,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080088579] [2021-06-05 18:22:38,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080088579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:38,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782099011] [2021-06-05 18:22:38,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:38,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:22:38,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:38,973 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:38,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782099011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:38,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:38,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:22:38,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638138482] [2021-06-05 18:22:38,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:22:38,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:38,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:22:38,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:22:38,974 INFO L87 Difference]: Start difference. First operand 3303 states and 9193 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:39,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:39,570 INFO L93 Difference]: Finished difference Result 4321 states and 11432 transitions. [2021-06-05 18:22:39,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:22:39,571 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:22:39,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:39,575 INFO L225 Difference]: With dead ends: 4321 [2021-06-05 18:22:39,575 INFO L226 Difference]: Without dead ends: 4051 [2021-06-05 18:22:39,575 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 579.0ms TimeCoverageRelationStatistics Valid=747, Invalid=2223, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 18:22:39,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-06-05 18:22:39,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 3378. [2021-06-05 18:22:39,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3378 states, 3377 states have (on average 2.788865857269766) internal successors, (9418), 3377 states have internal predecessors, (9418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:39,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3378 states to 3378 states and 9418 transitions. [2021-06-05 18:22:39,612 INFO L78 Accepts]: Start accepts. Automaton has 3378 states and 9418 transitions. Word has length 110 [2021-06-05 18:22:39,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:39,612 INFO L482 AbstractCegarLoop]: Abstraction has 3378 states and 9418 transitions. [2021-06-05 18:22:39,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:39,613 INFO L276 IsEmpty]: Start isEmpty. Operand 3378 states and 9418 transitions. [2021-06-05 18:22:39,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:22:39,615 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:39,615 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:39,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:39,815 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:39,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:39,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1075709081, now seen corresponding path program 128 times [2021-06-05 18:22:39,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:39,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899087268] [2021-06-05 18:22:39,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:39,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:39,961 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:39,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:39,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899087268] [2021-06-05 18:22:39,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899087268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:39,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680365634] [2021-06-05 18:22:39,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:40,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:22:40,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:40,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:22:40,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:40,141 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:40,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680365634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:40,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:40,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 18:22:40,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362453269] [2021-06-05 18:22:40,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:22:40,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:40,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:22:40,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:22:40,142 INFO L87 Difference]: Start difference. First operand 3378 states and 9418 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:40,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:40,611 INFO L93 Difference]: Finished difference Result 4391 states and 11677 transitions. [2021-06-05 18:22:40,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:22:40,611 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:22:40,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:40,616 INFO L225 Difference]: With dead ends: 4391 [2021-06-05 18:22:40,616 INFO L226 Difference]: Without dead ends: 4121 [2021-06-05 18:22:40,616 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 455.1ms TimeCoverageRelationStatistics Valid=734, Invalid=2022, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 18:22:40,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4121 states. [2021-06-05 18:22:40,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4121 to 3453. [2021-06-05 18:22:40,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3453 states, 3452 states have (on average 2.7977983777520277) internal successors, (9658), 3452 states have internal predecessors, (9658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:40,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3453 states to 3453 states and 9658 transitions. [2021-06-05 18:22:40,652 INFO L78 Accepts]: Start accepts. Automaton has 3453 states and 9658 transitions. Word has length 110 [2021-06-05 18:22:40,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:40,652 INFO L482 AbstractCegarLoop]: Abstraction has 3453 states and 9658 transitions. [2021-06-05 18:22:40,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:40,652 INFO L276 IsEmpty]: Start isEmpty. Operand 3453 states and 9658 transitions. [2021-06-05 18:22:40,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:22:40,655 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:40,655 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:40,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 18:22:40,857 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:40,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:40,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1505462665, now seen corresponding path program 129 times [2021-06-05 18:22:40,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:40,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599959262] [2021-06-05 18:22:40,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:40,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:40,988 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:40,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:40,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599959262] [2021-06-05 18:22:40,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599959262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:40,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851969397] [2021-06-05 18:22:40,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:41,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:22:41,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:41,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:22:41,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:41,185 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:41,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851969397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:41,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:41,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:22:41,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641279770] [2021-06-05 18:22:41,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:22:41,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:41,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:22:41,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:22:41,186 INFO L87 Difference]: Start difference. First operand 3453 states and 9658 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:41,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:41,834 INFO L93 Difference]: Finished difference Result 4969 states and 13303 transitions. [2021-06-05 18:22:41,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:22:41,835 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:22:41,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:41,839 INFO L225 Difference]: With dead ends: 4969 [2021-06-05 18:22:41,839 INFO L226 Difference]: Without dead ends: 4346 [2021-06-05 18:22:41,839 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 581.5ms TimeCoverageRelationStatistics Valid=737, Invalid=2455, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 18:22:41,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4346 states. [2021-06-05 18:22:41,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4346 to 3528. [2021-06-05 18:22:41,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8035157357527645) internal successors, (9888), 3527 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:41,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9888 transitions. [2021-06-05 18:22:41,871 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9888 transitions. Word has length 110 [2021-06-05 18:22:41,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:41,871 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9888 transitions. [2021-06-05 18:22:41,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:41,871 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9888 transitions. [2021-06-05 18:22:41,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:22:41,874 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:41,874 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:42,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-05 18:22:42,074 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:42,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:42,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1447728535, now seen corresponding path program 130 times [2021-06-05 18:22:42,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:42,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49755755] [2021-06-05 18:22:42,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:42,198 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:42,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:42,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49755755] [2021-06-05 18:22:42,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49755755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:42,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341240681] [2021-06-05 18:22:42,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:42,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:22:42,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:42,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:22:42,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:42,377 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:42,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341240681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:42,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:42,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 18:22:42,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102392937] [2021-06-05 18:22:42,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:22:42,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:42,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:22:42,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:22:42,378 INFO L87 Difference]: Start difference. First operand 3528 states and 9888 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:42,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:42,888 INFO L93 Difference]: Finished difference Result 5198 states and 14021 transitions. [2021-06-05 18:22:42,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:22:42,889 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:22:42,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:42,893 INFO L225 Difference]: With dead ends: 5198 [2021-06-05 18:22:42,893 INFO L226 Difference]: Without dead ends: 4928 [2021-06-05 18:22:42,894 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 475.1ms TimeCoverageRelationStatistics Valid=839, Invalid=2131, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 18:22:42,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4928 states. [2021-06-05 18:22:42,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4928 to 3708. [2021-06-05 18:22:42,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3708 states, 3707 states have (on average 2.8181818181818183) internal successors, (10447), 3707 states have internal predecessors, (10447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:42,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 10447 transitions. [2021-06-05 18:22:42,930 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 10447 transitions. Word has length 110 [2021-06-05 18:22:42,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:42,930 INFO L482 AbstractCegarLoop]: Abstraction has 3708 states and 10447 transitions. [2021-06-05 18:22:42,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:42,930 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 10447 transitions. [2021-06-05 18:22:42,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:22:42,933 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:42,933 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:43,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 18:22:43,133 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:43,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:43,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1470071785, now seen corresponding path program 131 times [2021-06-05 18:22:43,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:43,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004604706] [2021-06-05 18:22:43,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:43,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:43,260 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:43,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:43,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004604706] [2021-06-05 18:22:43,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004604706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:43,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110222810] [2021-06-05 18:22:43,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:43,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:22:43,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:43,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:22:43,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:43,457 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:43,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110222810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:43,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:43,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:22:43,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177002844] [2021-06-05 18:22:43,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:22:43,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:43,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:22:43,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:22:43,458 INFO L87 Difference]: Start difference. First operand 3708 states and 10447 transitions. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:44,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:44,179 INFO L93 Difference]: Finished difference Result 5021 states and 13521 transitions. [2021-06-05 18:22:44,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:22:44,179 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:22:44,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:44,183 INFO L225 Difference]: With dead ends: 5021 [2021-06-05 18:22:44,183 INFO L226 Difference]: Without dead ends: 4446 [2021-06-05 18:22:44,184 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 688.3ms TimeCoverageRelationStatistics Valid=997, Invalid=2785, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 18:22:44,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4446 states. [2021-06-05 18:22:44,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4446 to 2603. [2021-06-05 18:22:44,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.735588009223674) internal successors, (7118), 2602 states have internal predecessors, (7118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:44,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7118 transitions. [2021-06-05 18:22:44,211 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7118 transitions. Word has length 110 [2021-06-05 18:22:44,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:44,211 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7118 transitions. [2021-06-05 18:22:44,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:44,211 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7118 transitions. [2021-06-05 18:22:44,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:22:44,213 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:44,213 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:44,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:44,413 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:44,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:44,414 INFO L82 PathProgramCache]: Analyzing trace with hash 2082436406, now seen corresponding path program 132 times [2021-06-05 18:22:44,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:44,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553857086] [2021-06-05 18:22:44,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:44,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:44,580 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:44,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:44,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553857086] [2021-06-05 18:22:44,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553857086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:44,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872347930] [2021-06-05 18:22:44,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:44,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:22:44,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:44,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:22:44,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:44,787 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:44,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872347930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:44,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:44,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 18:22:44,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256021073] [2021-06-05 18:22:44,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:22:44,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:44,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:22:44,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:22:44,788 INFO L87 Difference]: Start difference. First operand 2603 states and 7118 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:45,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:45,139 INFO L93 Difference]: Finished difference Result 3821 states and 9757 transitions. [2021-06-05 18:22:45,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:22:45,140 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:22:45,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:45,143 INFO L225 Difference]: With dead ends: 3821 [2021-06-05 18:22:45,143 INFO L226 Difference]: Without dead ends: 3551 [2021-06-05 18:22:45,143 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 380.1ms TimeCoverageRelationStatistics Valid=508, Invalid=1472, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:22:45,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3551 states. [2021-06-05 18:22:45,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3551 to 2678. [2021-06-05 18:22:45,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 2677 states have (on average 2.742995890922675) internal successors, (7343), 2677 states have internal predecessors, (7343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:45,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 7343 transitions. [2021-06-05 18:22:45,169 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 7343 transitions. Word has length 115 [2021-06-05 18:22:45,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:45,169 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 7343 transitions. [2021-06-05 18:22:45,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:45,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 7343 transitions. [2021-06-05 18:22:45,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:22:45,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:45,171 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:45,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:45,371 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:45,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:45,371 INFO L82 PathProgramCache]: Analyzing trace with hash -112889306, now seen corresponding path program 133 times [2021-06-05 18:22:45,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:45,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651012931] [2021-06-05 18:22:45,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:45,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:45,549 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:45,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:45,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651012931] [2021-06-05 18:22:45,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651012931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:45,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187336104] [2021-06-05 18:22:45,550 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:45,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:22:45,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:45,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187336104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:45,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:45,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:22:45,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955916351] [2021-06-05 18:22:45,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:22:45,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:45,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:22:45,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:22:45,780 INFO L87 Difference]: Start difference. First operand 2678 states and 7343 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:46,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:46,157 INFO L93 Difference]: Finished difference Result 4241 states and 10672 transitions. [2021-06-05 18:22:46,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:22:46,157 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:22:46,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:46,161 INFO L225 Difference]: With dead ends: 4241 [2021-06-05 18:22:46,161 INFO L226 Difference]: Without dead ends: 3971 [2021-06-05 18:22:46,161 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 439.7ms TimeCoverageRelationStatistics Valid=560, Invalid=1696, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:22:46,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3971 states. [2021-06-05 18:22:46,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3971 to 2753. [2021-06-05 18:22:46,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 2.75) internal successors, (7568), 2752 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:46,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7568 transitions. [2021-06-05 18:22:46,188 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7568 transitions. Word has length 115 [2021-06-05 18:22:46,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:46,188 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7568 transitions. [2021-06-05 18:22:46,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:46,188 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7568 transitions. [2021-06-05 18:22:46,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:22:46,190 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:46,190 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:46,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:46,390 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:46,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:46,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1397310772, now seen corresponding path program 134 times [2021-06-05 18:22:46,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:46,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719626147] [2021-06-05 18:22:46,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:46,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:46,550 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:46,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:46,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719626147] [2021-06-05 18:22:46,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719626147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:46,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609928750] [2021-06-05 18:22:46,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:46,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:22:46,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:46,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:22:46,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:46,743 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:46,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609928750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:46,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:46,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 18:22:46,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850124955] [2021-06-05 18:22:46,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:22:46,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:46,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:22:46,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:22:46,744 INFO L87 Difference]: Start difference. First operand 2753 states and 7568 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:47,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:47,113 INFO L93 Difference]: Finished difference Result 4271 states and 10807 transitions. [2021-06-05 18:22:47,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:22:47,113 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:22:47,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:47,117 INFO L225 Difference]: With dead ends: 4271 [2021-06-05 18:22:47,117 INFO L226 Difference]: Without dead ends: 4001 [2021-06-05 18:22:47,117 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 395.8ms TimeCoverageRelationStatistics Valid=560, Invalid=1696, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:22:47,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2021-06-05 18:22:47,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 2828. [2021-06-05 18:22:47,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 2.75663247258578) internal successors, (7793), 2827 states have internal predecessors, (7793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:47,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7793 transitions. [2021-06-05 18:22:47,144 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7793 transitions. Word has length 115 [2021-06-05 18:22:47,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:47,144 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7793 transitions. [2021-06-05 18:22:47,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:47,145 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7793 transitions. [2021-06-05 18:22:47,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:22:47,146 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:47,146 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:47,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-06-05 18:22:47,347 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:47,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:47,347 INFO L82 PathProgramCache]: Analyzing trace with hash 2036968996, now seen corresponding path program 135 times [2021-06-05 18:22:47,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:47,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232738950] [2021-06-05 18:22:47,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:47,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:47,511 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:47,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:47,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232738950] [2021-06-05 18:22:47,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232738950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:47,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773261405] [2021-06-05 18:22:47,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:47,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:22:47,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:47,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:22:47,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:47,739 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:47,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773261405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:47,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:47,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:22:47,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164525966] [2021-06-05 18:22:47,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:22:47,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:47,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:22:47,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:22:47,739 INFO L87 Difference]: Start difference. First operand 2828 states and 7793 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:48,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:48,161 INFO L93 Difference]: Finished difference Result 4296 states and 10932 transitions. [2021-06-05 18:22:48,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:22:48,161 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:22:48,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:48,165 INFO L225 Difference]: With dead ends: 4296 [2021-06-05 18:22:48,165 INFO L226 Difference]: Without dead ends: 4026 [2021-06-05 18:22:48,165 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 462.6ms TimeCoverageRelationStatistics Valid=577, Invalid=1873, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 18:22:48,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-06-05 18:22:48,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 2903. [2021-06-05 18:22:48,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2903 states, 2902 states have (on average 2.7629221226740177) internal successors, (8018), 2902 states have internal predecessors, (8018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:48,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 8018 transitions. [2021-06-05 18:22:48,195 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 8018 transitions. Word has length 115 [2021-06-05 18:22:48,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:48,195 INFO L482 AbstractCegarLoop]: Abstraction has 2903 states and 8018 transitions. [2021-06-05 18:22:48,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:48,195 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 8018 transitions. [2021-06-05 18:22:48,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:22:48,197 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:48,197 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:48,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:48,398 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:48,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:48,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1262049970, now seen corresponding path program 136 times [2021-06-05 18:22:48,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:48,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126468539] [2021-06-05 18:22:48,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:48,556 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:48,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:48,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126468539] [2021-06-05 18:22:48,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126468539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:48,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217218194] [2021-06-05 18:22:48,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:48,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:22:48,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:48,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:22:48,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:48,748 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:48,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217218194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:48,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:48,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 18:22:48,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826498532] [2021-06-05 18:22:48,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:22:48,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:48,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:22:48,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:22:48,749 INFO L87 Difference]: Start difference. First operand 2903 states and 8018 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:49,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:49,136 INFO L93 Difference]: Finished difference Result 4321 states and 11057 transitions. [2021-06-05 18:22:49,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:22:49,136 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:22:49,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:49,140 INFO L225 Difference]: With dead ends: 4321 [2021-06-05 18:22:49,140 INFO L226 Difference]: Without dead ends: 4051 [2021-06-05 18:22:49,140 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 412.7ms TimeCoverageRelationStatistics Valid=597, Invalid=1853, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 18:22:49,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-06-05 18:22:49,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 2978. [2021-06-05 18:22:49,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2978 states, 2977 states have (on average 2.7688948605979173) internal successors, (8243), 2977 states have internal predecessors, (8243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:49,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 8243 transitions. [2021-06-05 18:22:49,169 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 8243 transitions. Word has length 115 [2021-06-05 18:22:49,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:49,169 INFO L482 AbstractCegarLoop]: Abstraction has 2978 states and 8243 transitions. [2021-06-05 18:22:49,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:49,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 8243 transitions. [2021-06-05 18:22:49,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:22:49,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:49,171 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:49,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 18:22:49,371 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:49,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:49,372 INFO L82 PathProgramCache]: Analyzing trace with hash 808136610, now seen corresponding path program 137 times [2021-06-05 18:22:49,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:49,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365534673] [2021-06-05 18:22:49,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:49,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:49,565 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:49,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:49,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365534673] [2021-06-05 18:22:49,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365534673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:49,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419702508] [2021-06-05 18:22:49,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:49,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:22:49,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:49,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:22:49,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:49,777 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:49,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419702508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:49,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:49,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:22:49,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179898242] [2021-06-05 18:22:49,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:22:49,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:49,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:22:49,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:22:49,778 INFO L87 Difference]: Start difference. First operand 2978 states and 8243 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:50,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:50,265 INFO L93 Difference]: Finished difference Result 4346 states and 11182 transitions. [2021-06-05 18:22:50,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:22:50,265 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:22:50,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:50,269 INFO L225 Difference]: With dead ends: 4346 [2021-06-05 18:22:50,269 INFO L226 Difference]: Without dead ends: 4076 [2021-06-05 18:22:50,270 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 530.9ms TimeCoverageRelationStatistics Valid=622, Invalid=2030, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 18:22:50,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-05 18:22:50,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3053. [2021-06-05 18:22:50,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 3052 states have (on average 2.7745740498034075) internal successors, (8468), 3052 states have internal predecessors, (8468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:50,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 8468 transitions. [2021-06-05 18:22:50,303 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 8468 transitions. Word has length 115 [2021-06-05 18:22:50,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:50,303 INFO L482 AbstractCegarLoop]: Abstraction has 3053 states and 8468 transitions. [2021-06-05 18:22:50,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:50,303 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 8468 transitions. [2021-06-05 18:22:50,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:22:50,305 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:50,305 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:50,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:50,506 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:50,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:50,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1686148528, now seen corresponding path program 138 times [2021-06-05 18:22:50,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:50,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134461812] [2021-06-05 18:22:50,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:50,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:50,657 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:50,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:50,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134461812] [2021-06-05 18:22:50,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134461812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:50,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482601779] [2021-06-05 18:22:50,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:50,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:22:50,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:50,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:22:50,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:50,858 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:50,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482601779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:50,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:50,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 18:22:50,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974529545] [2021-06-05 18:22:50,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:22:50,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:50,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:22:50,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:22:50,859 INFO L87 Difference]: Start difference. First operand 3053 states and 8468 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:51,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:51,283 INFO L93 Difference]: Finished difference Result 4371 states and 11307 transitions. [2021-06-05 18:22:51,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:22:51,283 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:22:51,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:51,287 INFO L225 Difference]: With dead ends: 4371 [2021-06-05 18:22:51,287 INFO L226 Difference]: Without dead ends: 4101 [2021-06-05 18:22:51,288 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 436.0ms TimeCoverageRelationStatistics Valid=650, Invalid=2002, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 18:22:51,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4101 states. [2021-06-05 18:22:51,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4101 to 3128. [2021-06-05 18:22:51,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3128 states, 3127 states have (on average 2.7799808122801406) internal successors, (8693), 3127 states have internal predecessors, (8693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:51,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 8693 transitions. [2021-06-05 18:22:51,330 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 8693 transitions. Word has length 115 [2021-06-05 18:22:51,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:51,330 INFO L482 AbstractCegarLoop]: Abstraction has 3128 states and 8693 transitions. [2021-06-05 18:22:51,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:51,330 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 8693 transitions. [2021-06-05 18:22:51,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:22:51,332 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:51,332 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:51,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 18:22:51,539 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:51,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:51,540 INFO L82 PathProgramCache]: Analyzing trace with hash 786093728, now seen corresponding path program 139 times [2021-06-05 18:22:51,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:51,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293470576] [2021-06-05 18:22:51,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:51,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:51,695 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:51,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:51,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293470576] [2021-06-05 18:22:51,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293470576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:51,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81412615] [2021-06-05 18:22:51,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:51,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:51,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:22:51,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:51,907 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:51,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81412615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:51,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:51,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:22:51,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039279913] [2021-06-05 18:22:51,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:22:51,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:51,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:22:51,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:22:51,908 INFO L87 Difference]: Start difference. First operand 3128 states and 8693 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:52,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:52,441 INFO L93 Difference]: Finished difference Result 4396 states and 11432 transitions. [2021-06-05 18:22:52,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:22:52,441 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:22:52,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:52,445 INFO L225 Difference]: With dead ends: 4396 [2021-06-05 18:22:52,445 INFO L226 Difference]: Without dead ends: 4126 [2021-06-05 18:22:52,445 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 533.6ms TimeCoverageRelationStatistics Valid=677, Invalid=2185, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 18:22:52,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-06-05 18:22:52,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 3203. [2021-06-05 18:22:52,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 3202 states have (on average 2.7851342910680823) internal successors, (8918), 3202 states have internal predecessors, (8918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:52,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8918 transitions. [2021-06-05 18:22:52,477 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8918 transitions. Word has length 115 [2021-06-05 18:22:52,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:52,477 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8918 transitions. [2021-06-05 18:22:52,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:52,478 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8918 transitions. [2021-06-05 18:22:52,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:22:52,480 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:52,480 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:52,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 18:22:52,680 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:52,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:52,680 INFO L82 PathProgramCache]: Analyzing trace with hash 357029422, now seen corresponding path program 140 times [2021-06-05 18:22:52,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:52,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95264760] [2021-06-05 18:22:52,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:52,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:52,827 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:52,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:52,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95264760] [2021-06-05 18:22:52,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95264760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:52,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902259496] [2021-06-05 18:22:52,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:52,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:22:52,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:52,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:22:52,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:53,013 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:53,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902259496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:53,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:53,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 18:22:53,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551358438] [2021-06-05 18:22:53,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:22:53,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:53,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:22:53,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:22:53,014 INFO L87 Difference]: Start difference. First operand 3203 states and 8918 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:53,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:53,491 INFO L93 Difference]: Finished difference Result 4421 states and 11557 transitions. [2021-06-05 18:22:53,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:22:53,491 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:22:53,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:53,495 INFO L225 Difference]: With dead ends: 4421 [2021-06-05 18:22:53,495 INFO L226 Difference]: Without dead ends: 4151 [2021-06-05 18:22:53,495 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 467.0ms TimeCoverageRelationStatistics Valid=719, Invalid=2143, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 18:22:53,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-06-05 18:22:53,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3278. [2021-06-05 18:22:53,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3278 states, 3277 states have (on average 2.790051876716509) internal successors, (9143), 3277 states have internal predecessors, (9143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:53,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 9143 transitions. [2021-06-05 18:22:53,528 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 9143 transitions. Word has length 115 [2021-06-05 18:22:53,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:53,528 INFO L482 AbstractCegarLoop]: Abstraction has 3278 states and 9143 transitions. [2021-06-05 18:22:53,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:53,528 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 9143 transitions. [2021-06-05 18:22:53,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:22:53,530 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:53,530 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:53,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:53,731 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:53,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:53,732 INFO L82 PathProgramCache]: Analyzing trace with hash -329153762, now seen corresponding path program 141 times [2021-06-05 18:22:53,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:53,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981107491] [2021-06-05 18:22:53,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:53,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:53,889 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:53,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:53,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981107491] [2021-06-05 18:22:53,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981107491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:53,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950731574] [2021-06-05 18:22:53,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:53,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:22:53,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:53,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:22:53,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:54,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950731574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:54,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:54,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:22:54,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586069161] [2021-06-05 18:22:54,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:22:54,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:54,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:22:54,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:22:54,098 INFO L87 Difference]: Start difference. First operand 3278 states and 9143 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:54,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:54,662 INFO L93 Difference]: Finished difference Result 4446 states and 11682 transitions. [2021-06-05 18:22:54,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:22:54,662 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:22:54,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:54,666 INFO L225 Difference]: With dead ends: 4446 [2021-06-05 18:22:54,666 INFO L226 Difference]: Without dead ends: 4176 [2021-06-05 18:22:54,666 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 546.5ms TimeCoverageRelationStatistics Valid=715, Invalid=2365, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 18:22:54,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-06-05 18:22:54,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 3353. [2021-06-05 18:22:54,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3352 states have (on average 2.7947494033412887) internal successors, (9368), 3352 states have internal predecessors, (9368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:54,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9368 transitions. [2021-06-05 18:22:54,702 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9368 transitions. Word has length 115 [2021-06-05 18:22:54,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:54,702 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9368 transitions. [2021-06-05 18:22:54,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:54,702 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9368 transitions. [2021-06-05 18:22:54,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:22:54,704 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:54,704 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:54,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 18:22:54,909 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:54,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:54,909 INFO L82 PathProgramCache]: Analyzing trace with hash -414188500, now seen corresponding path program 142 times [2021-06-05 18:22:54,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:54,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656172284] [2021-06-05 18:22:54,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:54,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:55,052 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:55,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:55,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656172284] [2021-06-05 18:22:55,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656172284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:55,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107499] [2021-06-05 18:22:55,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:55,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:22:55,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:55,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:22:55,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:55,286 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:55,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:55,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:55,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 18:22:55,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580215852] [2021-06-05 18:22:55,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:22:55,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:55,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:22:55,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:22:55,287 INFO L87 Difference]: Start difference. First operand 3353 states and 9368 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:55,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:55,810 INFO L93 Difference]: Finished difference Result 4471 states and 11807 transitions. [2021-06-05 18:22:55,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:22:55,811 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:22:55,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:55,815 INFO L225 Difference]: With dead ends: 4471 [2021-06-05 18:22:55,815 INFO L226 Difference]: Without dead ends: 4201 [2021-06-05 18:22:55,815 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 472.3ms TimeCoverageRelationStatistics Valid=804, Invalid=2276, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 18:22:55,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-06-05 18:22:55,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 3428. [2021-06-05 18:22:55,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 2.7992413189378467) internal successors, (9593), 3427 states have internal predecessors, (9593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:55,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9593 transitions. [2021-06-05 18:22:55,853 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9593 transitions. Word has length 115 [2021-06-05 18:22:55,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:55,854 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9593 transitions. [2021-06-05 18:22:55,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:55,854 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9593 transitions. [2021-06-05 18:22:55,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:22:55,856 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:55,856 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:56,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:56,065 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:56,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:56,065 INFO L82 PathProgramCache]: Analyzing trace with hash -482339556, now seen corresponding path program 143 times [2021-06-05 18:22:56,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:56,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516119469] [2021-06-05 18:22:56,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:56,224 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:56,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:56,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516119469] [2021-06-05 18:22:56,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516119469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:56,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674285375] [2021-06-05 18:22:56,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:56,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:22:56,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:56,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:22:56,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:56,478 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:56,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674285375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:56,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:56,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:22:56,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152815708] [2021-06-05 18:22:56,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:22:56,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:56,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:22:56,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:22:56,479 INFO L87 Difference]: Start difference. First operand 3428 states and 9593 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:57,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:57,184 INFO L93 Difference]: Finished difference Result 4496 states and 11932 transitions. [2021-06-05 18:22:57,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:22:57,184 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:22:57,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:57,188 INFO L225 Difference]: With dead ends: 4496 [2021-06-05 18:22:57,189 INFO L226 Difference]: Without dead ends: 4226 [2021-06-05 18:22:57,189 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 660.3ms TimeCoverageRelationStatistics Valid=835, Invalid=2471, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 18:22:57,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-06-05 18:22:57,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3503. [2021-06-05 18:22:57,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 3502 states have (on average 2.803540833809252) internal successors, (9818), 3502 states have internal predecessors, (9818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:57,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9818 transitions. [2021-06-05 18:22:57,261 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9818 transitions. Word has length 115 [2021-06-05 18:22:57,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:57,261 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9818 transitions. [2021-06-05 18:22:57,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:57,261 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9818 transitions. [2021-06-05 18:22:57,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:22:57,264 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:57,264 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:57,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:57,473 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:57,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:57,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1779308630, now seen corresponding path program 144 times [2021-06-05 18:22:57,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:57,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030458631] [2021-06-05 18:22:57,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:57,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:57,670 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:57,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:57,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030458631] [2021-06-05 18:22:57,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030458631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:57,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458604394] [2021-06-05 18:22:57,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:57,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:22:57,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:57,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:57,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:57,864 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:57,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458604394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:57,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:57,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 18:22:57,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697883528] [2021-06-05 18:22:57,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:22:57,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:57,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:22:57,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:22:57,865 INFO L87 Difference]: Start difference. First operand 3503 states and 9818 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:58,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:58,396 INFO L93 Difference]: Finished difference Result 4566 states and 12177 transitions. [2021-06-05 18:22:58,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:22:58,397 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:22:58,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:58,401 INFO L225 Difference]: With dead ends: 4566 [2021-06-05 18:22:58,401 INFO L226 Difference]: Without dead ends: 4296 [2021-06-05 18:22:58,401 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 528.0ms TimeCoverageRelationStatistics Valid=905, Invalid=2401, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 18:22:58,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4296 states. [2021-06-05 18:22:58,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4296 to 3578. [2021-06-05 18:22:58,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 3577 states have (on average 2.8118535085266982) internal successors, (10058), 3577 states have internal predecessors, (10058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:58,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 10058 transitions. [2021-06-05 18:22:58,443 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 10058 transitions. Word has length 115 [2021-06-05 18:22:58,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:58,444 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 10058 transitions. [2021-06-05 18:22:58,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:58,444 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 10058 transitions. [2021-06-05 18:22:58,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:22:58,446 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:58,447 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:58,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:58,649 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:58,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:58,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1349555046, now seen corresponding path program 145 times [2021-06-05 18:22:58,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:58,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481999140] [2021-06-05 18:22:58,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:58,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:58,789 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:58,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:58,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481999140] [2021-06-05 18:22:58,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481999140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:58,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603869376] [2021-06-05 18:22:58,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:58,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:58,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:22:58,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:58,984 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:58,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603869376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:58,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:58,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:22:58,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345164679] [2021-06-05 18:22:58,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:22:58,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:58,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:22:58,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:22:58,985 INFO L87 Difference]: Start difference. First operand 3578 states and 10058 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:59,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:59,738 INFO L93 Difference]: Finished difference Result 5144 states and 13803 transitions. [2021-06-05 18:22:59,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:22:59,738 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:22:59,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:59,743 INFO L225 Difference]: With dead ends: 5144 [2021-06-05 18:22:59,743 INFO L226 Difference]: Without dead ends: 4521 [2021-06-05 18:22:59,743 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 698.0ms TimeCoverageRelationStatistics Valid=961, Invalid=2821, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 18:22:59,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4521 states. [2021-06-05 18:22:59,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4521 to 3653. [2021-06-05 18:22:59,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 2.8170865279299013) internal successors, (10288), 3652 states have internal predecessors, (10288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:59,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10288 transitions. [2021-06-05 18:22:59,788 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10288 transitions. Word has length 115 [2021-06-05 18:22:59,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:59,788 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10288 transitions. [2021-06-05 18:22:59,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:59,788 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10288 transitions. [2021-06-05 18:22:59,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:22:59,791 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:59,791 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:59,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:59,993 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:59,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:59,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1407289176, now seen corresponding path program 146 times [2021-06-05 18:22:59,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:59,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27563586] [2021-06-05 18:22:59,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:59,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:00,144 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:00,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:00,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27563586] [2021-06-05 18:23:00,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27563586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:00,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503973072] [2021-06-05 18:23:00,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:00,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:23:00,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:00,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:23:00,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:00,346 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:00,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503973072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:00,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:00,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 18:23:00,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636578077] [2021-06-05 18:23:00,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:23:00,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:00,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:23:00,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:23:00,347 INFO L87 Difference]: Start difference. First operand 3653 states and 10288 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:00,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:00,922 INFO L93 Difference]: Finished difference Result 5348 states and 14471 transitions. [2021-06-05 18:23:00,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:23:00,923 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:23:00,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:00,927 INFO L225 Difference]: With dead ends: 5348 [2021-06-05 18:23:00,927 INFO L226 Difference]: Without dead ends: 5078 [2021-06-05 18:23:00,928 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 542.8ms TimeCoverageRelationStatistics Valid=1023, Invalid=2517, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 18:23:00,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5078 states. [2021-06-05 18:23:00,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5078 to 3833. [2021-06-05 18:23:00,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 2.8306367432150314) internal successors, (10847), 3832 states have internal predecessors, (10847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:00,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 10847 transitions. [2021-06-05 18:23:00,966 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 10847 transitions. Word has length 115 [2021-06-05 18:23:00,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:00,966 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 10847 transitions. [2021-06-05 18:23:00,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:00,966 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 10847 transitions. [2021-06-05 18:23:00,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:23:00,969 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:00,969 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:01,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-06-05 18:23:01,169 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:01,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:01,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1384945926, now seen corresponding path program 147 times [2021-06-05 18:23:01,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:01,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077865191] [2021-06-05 18:23:01,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:01,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:01,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:01,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077865191] [2021-06-05 18:23:01,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077865191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:01,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350238392] [2021-06-05 18:23:01,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:01,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:23:01,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:01,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:23:01,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:01,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350238392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:01,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:01,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:23:01,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252170553] [2021-06-05 18:23:01,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:23:01,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:01,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:23:01,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:23:01,510 INFO L87 Difference]: Start difference. First operand 3833 states and 10847 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:02,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:02,235 INFO L93 Difference]: Finished difference Result 5216 states and 14136 transitions. [2021-06-05 18:23:02,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:23:02,235 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:23:02,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:02,240 INFO L225 Difference]: With dead ends: 5216 [2021-06-05 18:23:02,240 INFO L226 Difference]: Without dead ends: 4641 [2021-06-05 18:23:02,240 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 681.4ms TimeCoverageRelationStatistics Valid=1013, Invalid=3147, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 18:23:02,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4641 states. [2021-06-05 18:23:02,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4641 to 2524. [2021-06-05 18:23:02,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2524 states, 2523 states have (on average 2.737217598097503) internal successors, (6906), 2523 states have internal predecessors, (6906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:02,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2524 states to 2524 states and 6906 transitions. [2021-06-05 18:23:02,269 INFO L78 Accepts]: Start accepts. Automaton has 2524 states and 6906 transitions. Word has length 115 [2021-06-05 18:23:02,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:02,269 INFO L482 AbstractCegarLoop]: Abstraction has 2524 states and 6906 transitions. [2021-06-05 18:23:02,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:02,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2524 states and 6906 transitions. [2021-06-05 18:23:02,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:23:02,271 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:02,271 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:02,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 18:23:02,471 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:02,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:02,471 INFO L82 PathProgramCache]: Analyzing trace with hash -736595598, now seen corresponding path program 148 times [2021-06-05 18:23:02,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:02,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999013304] [2021-06-05 18:23:02,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:02,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:02,660 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:02,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:02,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999013304] [2021-06-05 18:23:02,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999013304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:02,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529864093] [2021-06-05 18:23:02,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:02,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:23:02,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:02,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:23:02,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:02,911 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:02,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529864093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:02,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:02,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-06-05 18:23:02,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214462051] [2021-06-05 18:23:02,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:23:02,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:02,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:23:02,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:23:02,912 INFO L87 Difference]: Start difference. First operand 2524 states and 6906 transitions. Second operand has 26 states, 26 states have (on average 5.6923076923076925) internal successors, (148), 26 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:03,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:03,310 INFO L93 Difference]: Finished difference Result 3614 states and 9406 transitions. [2021-06-05 18:23:03,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:23:03,311 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.6923076923076925) internal successors, (148), 26 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:23:03,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:03,314 INFO L225 Difference]: With dead ends: 3614 [2021-06-05 18:23:03,314 INFO L226 Difference]: Without dead ends: 3280 [2021-06-05 18:23:03,314 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 459.6ms TimeCoverageRelationStatistics Valid=645, Invalid=1805, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 18:23:03,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-06-05 18:23:03,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 2609. [2021-06-05 18:23:03,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2609 states, 2608 states have (on average 2.71319018404908) internal successors, (7076), 2608 states have internal predecessors, (7076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:03,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2609 states to 2609 states and 7076 transitions. [2021-06-05 18:23:03,338 INFO L78 Accepts]: Start accepts. Automaton has 2609 states and 7076 transitions. Word has length 120 [2021-06-05 18:23:03,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:03,338 INFO L482 AbstractCegarLoop]: Abstraction has 2609 states and 7076 transitions. [2021-06-05 18:23:03,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.6923076923076925) internal successors, (148), 26 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:03,338 INFO L276 IsEmpty]: Start isEmpty. Operand 2609 states and 7076 transitions. [2021-06-05 18:23:03,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:23:03,340 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:03,340 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:03,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 18:23:03,541 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:03,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:03,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1812195050, now seen corresponding path program 149 times [2021-06-05 18:23:03,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:03,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312471231] [2021-06-05 18:23:03,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:03,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:03,734 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:03,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:03,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312471231] [2021-06-05 18:23:03,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312471231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:03,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108761166] [2021-06-05 18:23:03,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:03,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:23:03,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:03,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:23:03,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:03,926 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:03,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108761166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:03,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:03,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-05 18:23:03,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261340050] [2021-06-05 18:23:03,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:23:03,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:03,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:23:03,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:23:03,927 INFO L87 Difference]: Start difference. First operand 2609 states and 7076 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:04,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:04,258 INFO L93 Difference]: Finished difference Result 4436 states and 10987 transitions. [2021-06-05 18:23:04,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:23:04,258 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:23:04,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:04,262 INFO L225 Difference]: With dead ends: 4436 [2021-06-05 18:23:04,262 INFO L226 Difference]: Without dead ends: 4166 [2021-06-05 18:23:04,262 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 394.8ms TimeCoverageRelationStatistics Valid=512, Invalid=1380, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:23:04,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4166 states. [2021-06-05 18:23:04,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4166 to 2753. [2021-06-05 18:23:04,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 2.722747093023256) internal successors, (7493), 2752 states have internal predecessors, (7493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:04,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7493 transitions. [2021-06-05 18:23:04,289 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7493 transitions. Word has length 120 [2021-06-05 18:23:04,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:04,289 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7493 transitions. [2021-06-05 18:23:04,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:04,289 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7493 transitions. [2021-06-05 18:23:04,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:23:04,291 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:04,291 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:04,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 18:23:04,491 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:04,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:04,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1564387846, now seen corresponding path program 150 times [2021-06-05 18:23:04,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:04,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817016391] [2021-06-05 18:23:04,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:04,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:04,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:04,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817016391] [2021-06-05 18:23:04,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817016391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:04,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024433604] [2021-06-05 18:23:04,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:04,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:23:04,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:04,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:23:04,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:04,904 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:04,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024433604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:04,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:04,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:23:04,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630769329] [2021-06-05 18:23:04,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:23:04,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:04,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:23:04,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:23:04,905 INFO L87 Difference]: Start difference. First operand 2753 states and 7493 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:05,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:05,293 INFO L93 Difference]: Finished difference Result 4396 states and 10982 transitions. [2021-06-05 18:23:05,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:23:05,293 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:23:05,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:05,297 INFO L225 Difference]: With dead ends: 4396 [2021-06-05 18:23:05,297 INFO L226 Difference]: Without dead ends: 4126 [2021-06-05 18:23:05,298 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 450.6ms TimeCoverageRelationStatistics Valid=575, Invalid=1681, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:23:05,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-06-05 18:23:05,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 2828. [2021-06-05 18:23:05,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 2.73010258224266) internal successors, (7718), 2827 states have internal predecessors, (7718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:05,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7718 transitions. [2021-06-05 18:23:05,326 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7718 transitions. Word has length 120 [2021-06-05 18:23:05,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:05,326 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7718 transitions. [2021-06-05 18:23:05,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:05,326 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7718 transitions. [2021-06-05 18:23:05,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:23:05,328 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:05,328 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:05,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 18:23:05,529 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:05,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:05,529 INFO L82 PathProgramCache]: Analyzing trace with hash -212302956, now seen corresponding path program 151 times [2021-06-05 18:23:05,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:05,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291837376] [2021-06-05 18:23:05,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:05,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:05,706 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:05,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:05,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291837376] [2021-06-05 18:23:05,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291837376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:05,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724562982] [2021-06-05 18:23:05,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:05,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:05,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:23:05,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:05,892 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:05,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724562982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:05,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:05,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-05 18:23:05,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030991269] [2021-06-05 18:23:05,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:23:05,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:05,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:23:05,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:23:05,893 INFO L87 Difference]: Start difference. First operand 2828 states and 7718 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:06,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:06,246 INFO L93 Difference]: Finished difference Result 4446 states and 11157 transitions. [2021-06-05 18:23:06,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:23:06,246 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:23:06,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:06,250 INFO L225 Difference]: With dead ends: 4446 [2021-06-05 18:23:06,250 INFO L226 Difference]: Without dead ends: 4176 [2021-06-05 18:23:06,251 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 379.9ms TimeCoverageRelationStatistics Valid=519, Invalid=1551, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:23:06,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-06-05 18:23:06,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 2903. [2021-06-05 18:23:06,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2903 states, 2902 states have (on average 2.7370778773259823) internal successors, (7943), 2902 states have internal predecessors, (7943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:06,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 7943 transitions. [2021-06-05 18:23:06,281 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 7943 transitions. Word has length 120 [2021-06-05 18:23:06,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:06,281 INFO L482 AbstractCegarLoop]: Abstraction has 2903 states and 7943 transitions. [2021-06-05 18:23:06,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:06,281 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 7943 transitions. [2021-06-05 18:23:06,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:23:06,283 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:06,283 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:06,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 18:23:06,497 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:06,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:06,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1887338628, now seen corresponding path program 152 times [2021-06-05 18:23:06,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:06,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170909588] [2021-06-05 18:23:06,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:06,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:06,713 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:06,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:06,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170909588] [2021-06-05 18:23:06,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170909588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:06,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621494294] [2021-06-05 18:23:06,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:06,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:23:06,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:06,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:23:06,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:06,916 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:06,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621494294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:06,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:06,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:23:06,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6004112] [2021-06-05 18:23:06,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:23:06,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:06,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:23:06,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:23:06,917 INFO L87 Difference]: Start difference. First operand 2903 states and 7943 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:07,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:07,357 INFO L93 Difference]: Finished difference Result 4471 states and 11282 transitions. [2021-06-05 18:23:07,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:23:07,357 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:23:07,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:07,361 INFO L225 Difference]: With dead ends: 4471 [2021-06-05 18:23:07,361 INFO L226 Difference]: Without dead ends: 4201 [2021-06-05 18:23:07,362 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 487.5ms TimeCoverageRelationStatistics Valid=590, Invalid=1860, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 18:23:07,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-06-05 18:23:07,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 2978. [2021-06-05 18:23:07,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2978 states, 2977 states have (on average 2.7437017131340276) internal successors, (8168), 2977 states have internal predecessors, (8168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:07,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 8168 transitions. [2021-06-05 18:23:07,391 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 8168 transitions. Word has length 120 [2021-06-05 18:23:07,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:07,391 INFO L482 AbstractCegarLoop]: Abstraction has 2978 states and 8168 transitions. [2021-06-05 18:23:07,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:07,391 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 8168 transitions. [2021-06-05 18:23:07,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:23:07,393 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:07,393 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:07,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:07,593 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:07,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:07,594 INFO L82 PathProgramCache]: Analyzing trace with hash -897428590, now seen corresponding path program 153 times [2021-06-05 18:23:07,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:07,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998580192] [2021-06-05 18:23:07,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:07,768 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:07,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:07,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998580192] [2021-06-05 18:23:07,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998580192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:07,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578554051] [2021-06-05 18:23:07,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:07,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:23:07,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:07,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:23:07,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:07,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578554051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:07,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:07,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-05 18:23:07,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384993333] [2021-06-05 18:23:07,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:23:07,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:07,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:23:07,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:23:07,966 INFO L87 Difference]: Start difference. First operand 2978 states and 8168 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:08,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:08,359 INFO L93 Difference]: Finished difference Result 4496 states and 11407 transitions. [2021-06-05 18:23:08,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:23:08,360 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:23:08,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:08,364 INFO L225 Difference]: With dead ends: 4496 [2021-06-05 18:23:08,364 INFO L226 Difference]: Without dead ends: 4226 [2021-06-05 18:23:08,364 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 421.6ms TimeCoverageRelationStatistics Valid=542, Invalid=1714, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:23:08,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-06-05 18:23:08,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3053. [2021-06-05 18:23:08,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 3052 states have (on average 2.75) internal successors, (8393), 3052 states have internal predecessors, (8393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:08,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 8393 transitions. [2021-06-05 18:23:08,394 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 8393 transitions. Word has length 120 [2021-06-05 18:23:08,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:08,395 INFO L482 AbstractCegarLoop]: Abstraction has 3053 states and 8393 transitions. [2021-06-05 18:23:08,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:08,395 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 8393 transitions. [2021-06-05 18:23:08,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:23:08,397 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:08,397 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:08,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:08,599 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:08,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:08,599 INFO L82 PathProgramCache]: Analyzing trace with hash -257770366, now seen corresponding path program 154 times [2021-06-05 18:23:08,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:08,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988388706] [2021-06-05 18:23:08,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:08,776 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:08,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:08,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988388706] [2021-06-05 18:23:08,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988388706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:08,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826665478] [2021-06-05 18:23:08,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:08,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:23:08,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:08,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:23:08,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:09,000 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:09,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826665478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:09,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:09,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:23:09,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122202683] [2021-06-05 18:23:09,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:23:09,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:09,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:23:09,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:23:09,001 INFO L87 Difference]: Start difference. First operand 3053 states and 8393 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:09,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:09,477 INFO L93 Difference]: Finished difference Result 4521 states and 11532 transitions. [2021-06-05 18:23:09,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:23:09,477 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:23:09,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:09,481 INFO L225 Difference]: With dead ends: 4521 [2021-06-05 18:23:09,481 INFO L226 Difference]: Without dead ends: 4251 [2021-06-05 18:23:09,481 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 507.8ms TimeCoverageRelationStatistics Valid=621, Invalid=2031, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 18:23:09,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4251 states. [2021-06-05 18:23:09,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4251 to 3128. [2021-06-05 18:23:09,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3128 states, 3127 states have (on average 2.7559961624560283) internal successors, (8618), 3127 states have internal predecessors, (8618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:09,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 8618 transitions. [2021-06-05 18:23:09,512 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 8618 transitions. Word has length 120 [2021-06-05 18:23:09,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:09,512 INFO L482 AbstractCegarLoop]: Abstraction has 3128 states and 8618 transitions. [2021-06-05 18:23:09,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:09,512 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 8618 transitions. [2021-06-05 18:23:09,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:23:09,514 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:09,514 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:09,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:09,715 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:09,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:09,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1032689392, now seen corresponding path program 155 times [2021-06-05 18:23:09,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:09,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850161767] [2021-06-05 18:23:09,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:09,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:09,869 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:09,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:09,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850161767] [2021-06-05 18:23:09,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850161767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:09,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671518026] [2021-06-05 18:23:09,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:09,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:23:09,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:09,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:23:09,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:10,062 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:10,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671518026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:10,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:10,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-05 18:23:10,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860570387] [2021-06-05 18:23:10,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:23:10,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:10,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:23:10,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:23:10,063 INFO L87 Difference]: Start difference. First operand 3128 states and 8618 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:10,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:10,474 INFO L93 Difference]: Finished difference Result 4546 states and 11657 transitions. [2021-06-05 18:23:10,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:23:10,475 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:23:10,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:10,479 INFO L225 Difference]: With dead ends: 4546 [2021-06-05 18:23:10,479 INFO L226 Difference]: Without dead ends: 4276 [2021-06-05 18:23:10,479 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 419.7ms TimeCoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 18:23:10,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4276 states. [2021-06-05 18:23:10,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4276 to 3203. [2021-06-05 18:23:10,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 3202 states have (on average 2.7617114303560273) internal successors, (8843), 3202 states have internal predecessors, (8843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:10,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8843 transitions. [2021-06-05 18:23:10,511 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8843 transitions. Word has length 120 [2021-06-05 18:23:10,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:10,511 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8843 transitions. [2021-06-05 18:23:10,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:10,511 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8843 transitions. [2021-06-05 18:23:10,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:23:10,513 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:10,513 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:10,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:10,714 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:10,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:10,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1486602752, now seen corresponding path program 156 times [2021-06-05 18:23:10,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:10,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631834956] [2021-06-05 18:23:10,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:10,880 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:10,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:10,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631834956] [2021-06-05 18:23:10,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631834956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:10,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472078006] [2021-06-05 18:23:10,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:10,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:23:10,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:10,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:23:10,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:11,102 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:11,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472078006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:11,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:11,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:23:11,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223679303] [2021-06-05 18:23:11,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:23:11,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:11,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:23:11,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:23:11,103 INFO L87 Difference]: Start difference. First operand 3203 states and 8843 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:11,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:11,648 INFO L93 Difference]: Finished difference Result 4571 states and 11782 transitions. [2021-06-05 18:23:11,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:23:11,649 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:23:11,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:11,652 INFO L225 Difference]: With dead ends: 4571 [2021-06-05 18:23:11,652 INFO L226 Difference]: Without dead ends: 4301 [2021-06-05 18:23:11,653 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 556.7ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 18:23:11,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4301 states. [2021-06-05 18:23:11,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4301 to 3278. [2021-06-05 18:23:11,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3278 states, 3277 states have (on average 2.767165090021361) internal successors, (9068), 3277 states have internal predecessors, (9068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:11,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 9068 transitions. [2021-06-05 18:23:11,686 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 9068 transitions. Word has length 120 [2021-06-05 18:23:11,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:11,686 INFO L482 AbstractCegarLoop]: Abstraction has 3278 states and 9068 transitions. [2021-06-05 18:23:11,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:11,686 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 9068 transitions. [2021-06-05 18:23:11,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:23:11,688 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:11,688 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:11,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:11,889 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:11,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:11,889 INFO L82 PathProgramCache]: Analyzing trace with hash -608590834, now seen corresponding path program 157 times [2021-06-05 18:23:11,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:11,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626729070] [2021-06-05 18:23:11,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:12,047 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:12,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:12,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626729070] [2021-06-05 18:23:12,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626729070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:12,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197754760] [2021-06-05 18:23:12,047 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:12,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:12,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:23:12,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:12,228 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:12,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197754760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:12,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:12,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-05 18:23:12,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130516657] [2021-06-05 18:23:12,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:23:12,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:12,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:23:12,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:23:12,229 INFO L87 Difference]: Start difference. First operand 3278 states and 9068 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:12,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:12,698 INFO L93 Difference]: Finished difference Result 4596 states and 11907 transitions. [2021-06-05 18:23:12,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:23:12,699 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:23:12,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:12,703 INFO L225 Difference]: With dead ends: 4596 [2021-06-05 18:23:12,703 INFO L226 Difference]: Without dead ends: 4326 [2021-06-05 18:23:12,703 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 459.2ms TimeCoverageRelationStatistics Valid=636, Invalid=2016, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 18:23:12,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-06-05 18:23:12,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 3353. [2021-06-05 18:23:12,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3352 states have (on average 2.7723747016706444) internal successors, (9293), 3352 states have internal predecessors, (9293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:12,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9293 transitions. [2021-06-05 18:23:12,737 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9293 transitions. Word has length 120 [2021-06-05 18:23:12,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:12,737 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9293 transitions. [2021-06-05 18:23:12,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:12,737 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9293 transitions. [2021-06-05 18:23:12,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:23:12,739 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:12,739 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:12,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:12,940 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:12,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:12,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1508645634, now seen corresponding path program 158 times [2021-06-05 18:23:12,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:12,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211254005] [2021-06-05 18:23:12,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:13,111 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:13,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:13,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211254005] [2021-06-05 18:23:13,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211254005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:13,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047294110] [2021-06-05 18:23:13,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:13,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:23:13,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:13,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:23:13,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:13,321 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:13,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047294110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:13,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:13,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:23:13,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587583695] [2021-06-05 18:23:13,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:23:13,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:13,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:23:13,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:23:13,322 INFO L87 Difference]: Start difference. First operand 3353 states and 9293 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:13,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:13,920 INFO L93 Difference]: Finished difference Result 4621 states and 12032 transitions. [2021-06-05 18:23:13,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:23:13,920 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:23:13,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:13,924 INFO L225 Difference]: With dead ends: 4621 [2021-06-05 18:23:13,924 INFO L226 Difference]: Without dead ends: 4351 [2021-06-05 18:23:13,925 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 579.0ms TimeCoverageRelationStatistics Valid=731, Invalid=2349, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 18:23:13,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4351 states. [2021-06-05 18:23:13,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4351 to 3428. [2021-06-05 18:23:13,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 2.7773562882988037) internal successors, (9518), 3427 states have internal predecessors, (9518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:13,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9518 transitions. [2021-06-05 18:23:13,959 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9518 transitions. Word has length 120 [2021-06-05 18:23:13,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:13,960 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9518 transitions. [2021-06-05 18:23:13,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:13,960 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9518 transitions. [2021-06-05 18:23:13,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:23:13,962 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:13,962 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:14,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:14,165 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:14,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:14,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1937709940, now seen corresponding path program 159 times [2021-06-05 18:23:14,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:14,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136729090] [2021-06-05 18:23:14,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:14,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:14,323 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:14,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:14,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136729090] [2021-06-05 18:23:14,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136729090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:14,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918417123] [2021-06-05 18:23:14,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:14,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:23:14,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:14,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:23:14,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:14,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918417123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:14,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:14,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-05 18:23:14,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480760268] [2021-06-05 18:23:14,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:23:14,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:14,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:23:14,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:23:14,510 INFO L87 Difference]: Start difference. First operand 3428 states and 9518 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:15,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:15,018 INFO L93 Difference]: Finished difference Result 4646 states and 12157 transitions. [2021-06-05 18:23:15,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:23:15,018 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:23:15,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:15,022 INFO L225 Difference]: With dead ends: 4646 [2021-06-05 18:23:15,022 INFO L226 Difference]: Without dead ends: 4376 [2021-06-05 18:23:15,022 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 486.7ms TimeCoverageRelationStatistics Valid=707, Invalid=2155, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 18:23:15,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4376 states. [2021-06-05 18:23:15,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4376 to 3503. [2021-06-05 18:23:15,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 3502 states have (on average 2.7821245002855512) internal successors, (9743), 3502 states have internal predecessors, (9743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:15,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9743 transitions. [2021-06-05 18:23:15,061 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9743 transitions. Word has length 120 [2021-06-05 18:23:15,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:15,061 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9743 transitions. [2021-06-05 18:23:15,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:15,061 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9743 transitions. [2021-06-05 18:23:15,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:23:15,063 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:15,063 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:15,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 18:23:15,264 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:15,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:15,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1671074172, now seen corresponding path program 160 times [2021-06-05 18:23:15,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:15,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485321295] [2021-06-05 18:23:15,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:15,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:15,419 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:15,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:15,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485321295] [2021-06-05 18:23:15,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485321295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:15,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801499501] [2021-06-05 18:23:15,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:15,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:23:15,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:15,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:23:15,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:15,651 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:15,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801499501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:15,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:15,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:23:15,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465121831] [2021-06-05 18:23:15,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:23:15,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:15,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:23:15,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:23:15,652 INFO L87 Difference]: Start difference. First operand 3503 states and 9743 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:16,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:16,433 INFO L93 Difference]: Finished difference Result 4671 states and 12282 transitions. [2021-06-05 18:23:16,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:23:16,433 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:23:16,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:16,438 INFO L225 Difference]: With dead ends: 4671 [2021-06-05 18:23:16,438 INFO L226 Difference]: Without dead ends: 4401 [2021-06-05 18:23:16,438 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 714.3ms TimeCoverageRelationStatistics Valid=810, Invalid=2496, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 18:23:16,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2021-06-05 18:23:16,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 3578. [2021-06-05 18:23:16,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 3577 states have (on average 2.786692759295499) internal successors, (9968), 3577 states have internal predecessors, (9968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:16,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 9968 transitions. [2021-06-05 18:23:16,479 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 9968 transitions. Word has length 120 [2021-06-05 18:23:16,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:16,479 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 9968 transitions. [2021-06-05 18:23:16,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:16,479 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 9968 transitions. [2021-06-05 18:23:16,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:23:16,481 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:16,481 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:16,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 18:23:16,697 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:16,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:16,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1586039434, now seen corresponding path program 161 times [2021-06-05 18:23:16,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:16,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250167402] [2021-06-05 18:23:16,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:16,845 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:16,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:16,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250167402] [2021-06-05 18:23:16,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250167402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:16,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597547300] [2021-06-05 18:23:16,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:16,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:23:16,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:16,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:23:16,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:17,034 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:17,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597547300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:17,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:17,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-05 18:23:17,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551547232] [2021-06-05 18:23:17,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:23:17,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:17,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:23:17,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:23:17,035 INFO L87 Difference]: Start difference. First operand 3578 states and 9968 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:17,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:17,580 INFO L93 Difference]: Finished difference Result 4696 states and 12407 transitions. [2021-06-05 18:23:17,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:23:17,580 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:23:17,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:17,584 INFO L225 Difference]: With dead ends: 4696 [2021-06-05 18:23:17,584 INFO L226 Difference]: Without dead ends: 4426 [2021-06-05 18:23:17,585 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 513.4ms TimeCoverageRelationStatistics Valid=794, Invalid=2286, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 18:23:17,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4426 states. [2021-06-05 18:23:17,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4426 to 3653. [2021-06-05 18:23:17,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 2.7910733844468782) internal successors, (10193), 3652 states have internal predecessors, (10193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:17,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10193 transitions. [2021-06-05 18:23:17,624 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10193 transitions. Word has length 120 [2021-06-05 18:23:17,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:17,624 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10193 transitions. [2021-06-05 18:23:17,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:17,624 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10193 transitions. [2021-06-05 18:23:17,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:23:17,627 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:17,627 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:17,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 18:23:17,827 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:17,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:17,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1517888378, now seen corresponding path program 162 times [2021-06-05 18:23:17,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:17,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082122631] [2021-06-05 18:23:17,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:17,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:18,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:18,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082122631] [2021-06-05 18:23:18,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082122631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:18,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117363669] [2021-06-05 18:23:18,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:18,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:23:18,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:18,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:23:18,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:18,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117363669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:18,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:18,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:23:18,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729848297] [2021-06-05 18:23:18,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:23:18,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:18,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:23:18,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:23:18,356 INFO L87 Difference]: Start difference. First operand 3653 states and 10193 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:19,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:19,095 INFO L93 Difference]: Finished difference Result 4721 states and 12532 transitions. [2021-06-05 18:23:19,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:23:19,095 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:23:19,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:19,100 INFO L225 Difference]: With dead ends: 4721 [2021-06-05 18:23:19,100 INFO L226 Difference]: Without dead ends: 4451 [2021-06-05 18:23:19,100 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 739.8ms TimeCoverageRelationStatistics Valid=773, Invalid=2533, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 18:23:19,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2021-06-05 18:23:19,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 3728. [2021-06-05 18:23:19,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3728 states, 3727 states have (on average 2.795277703246579) internal successors, (10418), 3727 states have internal predecessors, (10418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:19,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 10418 transitions. [2021-06-05 18:23:19,140 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 10418 transitions. Word has length 120 [2021-06-05 18:23:19,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:19,141 INFO L482 AbstractCegarLoop]: Abstraction has 3728 states and 10418 transitions. [2021-06-05 18:23:19,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:19,141 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 10418 transitions. [2021-06-05 18:23:19,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:23:19,143 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:19,143 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:19,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:19,344 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:19,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:19,344 INFO L82 PathProgramCache]: Analyzing trace with hash 220919304, now seen corresponding path program 163 times [2021-06-05 18:23:19,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:19,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936501649] [2021-06-05 18:23:19,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:19,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:19,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:19,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936501649] [2021-06-05 18:23:19,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936501649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:19,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162473028] [2021-06-05 18:23:19,495 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:19,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:19,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:23:19,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:19,687 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:19,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162473028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:19,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:19,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-05 18:23:19,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728192906] [2021-06-05 18:23:19,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:23:19,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:19,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:23:19,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:23:19,688 INFO L87 Difference]: Start difference. First operand 3728 states and 10418 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:20,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:20,310 INFO L93 Difference]: Finished difference Result 4791 states and 12777 transitions. [2021-06-05 18:23:20,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:23:20,310 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:23:20,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:20,315 INFO L225 Difference]: With dead ends: 4791 [2021-06-05 18:23:20,315 INFO L226 Difference]: Without dead ends: 4521 [2021-06-05 18:23:20,315 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 559.1ms TimeCoverageRelationStatistics Valid=897, Invalid=2409, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 18:23:20,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4521 states. [2021-06-05 18:23:20,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4521 to 3803. [2021-06-05 18:23:20,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3803 states, 3802 states have (on average 2.8032614413466597) internal successors, (10658), 3802 states have internal predecessors, (10658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:20,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3803 states to 3803 states and 10658 transitions. [2021-06-05 18:23:20,359 INFO L78 Accepts]: Start accepts. Automaton has 3803 states and 10658 transitions. Word has length 120 [2021-06-05 18:23:20,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:20,359 INFO L482 AbstractCegarLoop]: Abstraction has 3803 states and 10658 transitions. [2021-06-05 18:23:20,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:20,359 INFO L276 IsEmpty]: Start isEmpty. Operand 3803 states and 10658 transitions. [2021-06-05 18:23:20,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:23:20,362 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:20,362 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:20,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-05 18:23:20,569 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:20,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:20,569 INFO L82 PathProgramCache]: Analyzing trace with hash 650672888, now seen corresponding path program 164 times [2021-06-05 18:23:20,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:20,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066143084] [2021-06-05 18:23:20,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:20,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:20,745 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:20,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:20,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066143084] [2021-06-05 18:23:20,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066143084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:20,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115859411] [2021-06-05 18:23:20,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:20,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:23:20,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:20,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:23:20,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:20,934 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:20,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115859411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:20,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:20,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:23:20,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372748617] [2021-06-05 18:23:20,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:23:20,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:20,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:23:20,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:23:20,935 INFO L87 Difference]: Start difference. First operand 3803 states and 10658 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:21,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:21,718 INFO L93 Difference]: Finished difference Result 5369 states and 14403 transitions. [2021-06-05 18:23:21,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:23:21,718 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:23:21,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:21,723 INFO L225 Difference]: With dead ends: 5369 [2021-06-05 18:23:21,723 INFO L226 Difference]: Without dead ends: 4746 [2021-06-05 18:23:21,723 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 727.9ms TimeCoverageRelationStatistics Valid=1037, Invalid=2995, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 18:23:21,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4746 states. [2021-06-05 18:23:21,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4746 to 3878. [2021-06-05 18:23:21,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8083569770441064) internal successors, (10888), 3877 states have internal predecessors, (10888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:21,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10888 transitions. [2021-06-05 18:23:21,761 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10888 transitions. Word has length 120 [2021-06-05 18:23:21,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:21,761 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10888 transitions. [2021-06-05 18:23:21,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:21,761 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10888 transitions. [2021-06-05 18:23:21,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:23:21,764 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:21,764 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:21,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:21,964 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:21,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:21,965 INFO L82 PathProgramCache]: Analyzing trace with hash 592938758, now seen corresponding path program 165 times [2021-06-05 18:23:21,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:21,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845465984] [2021-06-05 18:23:21,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:22,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:22,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845465984] [2021-06-05 18:23:22,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845465984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:22,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260636551] [2021-06-05 18:23:22,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:22,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:23:22,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:22,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:23:22,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:22,306 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:22,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260636551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:22,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:22,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-05 18:23:22,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066766543] [2021-06-05 18:23:22,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:23:22,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:22,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:23:22,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:23:22,307 INFO L87 Difference]: Start difference. First operand 3878 states and 10888 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:22,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:22,930 INFO L93 Difference]: Finished difference Result 5598 states and 15121 transitions. [2021-06-05 18:23:22,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:23:22,930 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:23:22,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:22,934 INFO L225 Difference]: With dead ends: 5598 [2021-06-05 18:23:22,934 INFO L226 Difference]: Without dead ends: 5328 [2021-06-05 18:23:22,934 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 574.7ms TimeCoverageRelationStatistics Valid=1017, Invalid=2523, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 18:23:22,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5328 states. [2021-06-05 18:23:22,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5328 to 4058. [2021-06-05 18:23:22,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4058 states, 4057 states have (on average 2.82154301207789) internal successors, (11447), 4057 states have internal predecessors, (11447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:22,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4058 states to 4058 states and 11447 transitions. [2021-06-05 18:23:22,974 INFO L78 Accepts]: Start accepts. Automaton has 4058 states and 11447 transitions. Word has length 120 [2021-06-05 18:23:22,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:22,974 INFO L482 AbstractCegarLoop]: Abstraction has 4058 states and 11447 transitions. [2021-06-05 18:23:22,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:22,974 INFO L276 IsEmpty]: Start isEmpty. Operand 4058 states and 11447 transitions. [2021-06-05 18:23:22,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:23:22,977 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:22,977 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:23,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:23,177 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:23,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:23,178 INFO L82 PathProgramCache]: Analyzing trace with hash 615282008, now seen corresponding path program 166 times [2021-06-05 18:23:23,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:23,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923845442] [2021-06-05 18:23:23,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:23,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:23,328 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:23,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:23,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923845442] [2021-06-05 18:23:23,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923845442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:23,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546339981] [2021-06-05 18:23:23,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:23,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:23:23,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:23,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:23:23,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:23,517 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:23,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546339981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:23,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:23,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:23:23,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112896170] [2021-06-05 18:23:23,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:23:23,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:23,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:23:23,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:23:23,518 INFO L87 Difference]: Start difference. First operand 4058 states and 11447 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:24,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:24,288 INFO L93 Difference]: Finished difference Result 5085 states and 13821 transitions. [2021-06-05 18:23:24,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:23:24,288 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:23:24,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:24,293 INFO L225 Difference]: With dead ends: 5085 [2021-06-05 18:23:24,293 INFO L226 Difference]: Without dead ends: 4506 [2021-06-05 18:23:24,293 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 726.8ms TimeCoverageRelationStatistics Valid=1146, Invalid=2886, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 18:23:24,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4506 states. [2021-06-05 18:23:24,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4506 to 2713. [2021-06-05 18:23:24,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 2.7389380530973453) internal successors, (7428), 2712 states have internal predecessors, (7428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:24,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7428 transitions. [2021-06-05 18:23:24,322 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7428 transitions. Word has length 120 [2021-06-05 18:23:24,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:24,322 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7428 transitions. [2021-06-05 18:23:24,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:24,322 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7428 transitions. [2021-06-05 18:23:24,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:23:24,324 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:24,324 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:24,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:24,525 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:24,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:24,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1413473561, now seen corresponding path program 167 times [2021-06-05 18:23:24,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:24,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611924022] [2021-06-05 18:23:24,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:24,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:24,719 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:24,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:24,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611924022] [2021-06-05 18:23:24,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611924022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:24,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599808116] [2021-06-05 18:23:24,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:24,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:23:24,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:24,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:23:24,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:24,943 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:24,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599808116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:24,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:24,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 18:23:24,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284413693] [2021-06-05 18:23:24,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:23:24,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:24,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:23:24,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:23:24,944 INFO L87 Difference]: Start difference. First operand 2713 states and 7428 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:25,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:25,341 INFO L93 Difference]: Finished difference Result 4031 states and 10267 transitions. [2021-06-05 18:23:25,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:23:25,341 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:23:25,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:25,344 INFO L225 Difference]: With dead ends: 4031 [2021-06-05 18:23:25,344 INFO L226 Difference]: Without dead ends: 3761 [2021-06-05 18:23:25,345 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 433.0ms TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:23:25,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2021-06-05 18:23:25,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 2788. [2021-06-05 18:23:25,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2788 states, 2787 states have (on average 2.7459634015069967) internal successors, (7653), 2787 states have internal predecessors, (7653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:25,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7653 transitions. [2021-06-05 18:23:25,371 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7653 transitions. Word has length 125 [2021-06-05 18:23:25,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:25,371 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7653 transitions. [2021-06-05 18:23:25,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:25,372 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7653 transitions. [2021-06-05 18:23:25,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:23:25,373 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:25,374 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:25,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-06-05 18:23:25,585 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:25,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:25,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1963109335, now seen corresponding path program 168 times [2021-06-05 18:23:25,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:25,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882795951] [2021-06-05 18:23:25,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:25,858 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:25,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:25,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882795951] [2021-06-05 18:23:25,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882795951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:25,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339547253] [2021-06-05 18:23:25,858 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:25,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:23:25,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:25,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:23:25,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:26,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339547253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:26,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:26,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:23:26,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121921966] [2021-06-05 18:23:26,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:23:26,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:26,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:23:26,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:23:26,106 INFO L87 Difference]: Start difference. First operand 2788 states and 7653 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:26,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:26,529 INFO L93 Difference]: Finished difference Result 4501 states and 11282 transitions. [2021-06-05 18:23:26,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:23:26,529 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:23:26,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:26,533 INFO L225 Difference]: With dead ends: 4501 [2021-06-05 18:23:26,533 INFO L226 Difference]: Without dead ends: 4231 [2021-06-05 18:23:26,533 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 525.8ms TimeCoverageRelationStatistics Valid=631, Invalid=1919, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 18:23:26,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4231 states. [2021-06-05 18:23:26,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4231 to 2863. [2021-06-05 18:23:26,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 2.752620545073375) internal successors, (7878), 2862 states have internal predecessors, (7878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:26,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7878 transitions. [2021-06-05 18:23:26,564 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7878 transitions. Word has length 125 [2021-06-05 18:23:26,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:26,564 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 7878 transitions. [2021-06-05 18:23:26,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:26,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7878 transitions. [2021-06-05 18:23:26,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:23:26,566 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:26,566 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:26,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:26,782 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:26,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:26,782 INFO L82 PathProgramCache]: Analyzing trace with hash 186418533, now seen corresponding path program 169 times [2021-06-05 18:23:26,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:26,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965483044] [2021-06-05 18:23:26,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:26,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:26,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:26,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965483044] [2021-06-05 18:23:26,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965483044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:26,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165463875] [2021-06-05 18:23:26,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:27,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:27,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:23:27,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:27,174 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:27,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165463875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:27,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:27,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 18:23:27,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936030064] [2021-06-05 18:23:27,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:23:27,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:27,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:23:27,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:23:27,175 INFO L87 Difference]: Start difference. First operand 2863 states and 7878 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:27,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:27,630 INFO L93 Difference]: Finished difference Result 4531 states and 11417 transitions. [2021-06-05 18:23:27,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:23:27,631 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:23:27,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:27,635 INFO L225 Difference]: With dead ends: 4531 [2021-06-05 18:23:27,635 INFO L226 Difference]: Without dead ends: 4261 [2021-06-05 18:23:27,635 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 497.2ms TimeCoverageRelationStatistics Valid=631, Invalid=1919, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 18:23:27,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4261 states. [2021-06-05 18:23:27,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4261 to 2938. [2021-06-05 18:23:27,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 2.758937691521961) internal successors, (8103), 2937 states have internal predecessors, (8103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:27,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 8103 transitions. [2021-06-05 18:23:27,693 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 8103 transitions. Word has length 125 [2021-06-05 18:23:27,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:27,693 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 8103 transitions. [2021-06-05 18:23:27,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:27,693 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 8103 transitions. [2021-06-05 18:23:27,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:23:27,695 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:27,695 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:27,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 18:23:27,911 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:27,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:27,911 INFO L82 PathProgramCache]: Analyzing trace with hash -2008907179, now seen corresponding path program 170 times [2021-06-05 18:23:27,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:27,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578277226] [2021-06-05 18:23:27,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:27,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:28,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:28,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578277226] [2021-06-05 18:23:28,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578277226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:28,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624156263] [2021-06-05 18:23:28,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:28,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:23:28,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:28,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:23:28,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:28,332 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:28,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624156263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:28,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:28,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:23:28,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2542986] [2021-06-05 18:23:28,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:23:28,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:28,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:23:28,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:23:28,333 INFO L87 Difference]: Start difference. First operand 2938 states and 8103 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:28,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:28,856 INFO L93 Difference]: Finished difference Result 4556 states and 11542 transitions. [2021-06-05 18:23:28,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:23:28,856 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:23:28,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:28,860 INFO L225 Difference]: With dead ends: 4556 [2021-06-05 18:23:28,861 INFO L226 Difference]: Without dead ends: 4286 [2021-06-05 18:23:28,861 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 564.4ms TimeCoverageRelationStatistics Valid=653, Invalid=2103, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 18:23:28,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4286 states. [2021-06-05 18:23:28,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4286 to 3013. [2021-06-05 18:23:28,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3013 states, 3012 states have (on average 2.764940239043825) internal successors, (8328), 3012 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:28,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 8328 transitions. [2021-06-05 18:23:28,894 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 8328 transitions. Word has length 125 [2021-06-05 18:23:28,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:28,894 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 8328 transitions. [2021-06-05 18:23:28,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:28,895 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 8328 transitions. [2021-06-05 18:23:28,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:23:28,897 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:28,897 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:29,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 18:23:29,105 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:29,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:29,105 INFO L82 PathProgramCache]: Analyzing trace with hash -498707101, now seen corresponding path program 171 times [2021-06-05 18:23:29,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:29,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840188095] [2021-06-05 18:23:29,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:29,381 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:29,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:29,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840188095] [2021-06-05 18:23:29,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840188095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:29,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779520661] [2021-06-05 18:23:29,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:29,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:23:29,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:29,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:23:29,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:29,581 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:29,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779520661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:29,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:29,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 18:23:29,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843450239] [2021-06-05 18:23:29,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:23:29,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:29,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:23:29,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:23:29,582 INFO L87 Difference]: Start difference. First operand 3013 states and 8328 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:30,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:30,026 INFO L93 Difference]: Finished difference Result 4581 states and 11667 transitions. [2021-06-05 18:23:30,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:23:30,027 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:23:30,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:30,031 INFO L225 Difference]: With dead ends: 4581 [2021-06-05 18:23:30,031 INFO L226 Difference]: Without dead ends: 4311 [2021-06-05 18:23:30,031 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 518.2ms TimeCoverageRelationStatistics Valid=667, Invalid=2089, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 18:23:30,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4311 states. [2021-06-05 18:23:30,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4311 to 3088. [2021-06-05 18:23:30,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 2.770651117589893) internal successors, (8553), 3087 states have internal predecessors, (8553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:30,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 8553 transitions. [2021-06-05 18:23:30,064 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 8553 transitions. Word has length 125 [2021-06-05 18:23:30,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:30,064 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 8553 transitions. [2021-06-05 18:23:30,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:30,064 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 8553 transitions. [2021-06-05 18:23:30,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:23:30,066 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:30,066 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:30,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 18:23:30,267 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:30,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:30,267 INFO L82 PathProgramCache]: Analyzing trace with hash 140951123, now seen corresponding path program 172 times [2021-06-05 18:23:30,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:30,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753072362] [2021-06-05 18:23:30,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:30,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:30,498 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:30,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:30,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753072362] [2021-06-05 18:23:30,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753072362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:30,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681360399] [2021-06-05 18:23:30,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:30,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:23:30,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:30,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:23:30,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:30,747 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:30,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681360399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:30,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:30,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:23:30,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861474686] [2021-06-05 18:23:30,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:23:30,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:30,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:23:30,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:23:30,748 INFO L87 Difference]: Start difference. First operand 3088 states and 8553 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:31,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:31,312 INFO L93 Difference]: Finished difference Result 4606 states and 11792 transitions. [2021-06-05 18:23:31,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:23:31,312 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:23:31,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:31,316 INFO L225 Difference]: With dead ends: 4606 [2021-06-05 18:23:31,316 INFO L226 Difference]: Without dead ends: 4336 [2021-06-05 18:23:31,316 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 599.7ms TimeCoverageRelationStatistics Valid=691, Invalid=2279, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 18:23:31,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4336 states. [2021-06-05 18:23:31,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4336 to 3163. [2021-06-05 18:23:31,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3163 states, 3162 states have (on average 2.7760910815939277) internal successors, (8778), 3162 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:31,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3163 states to 3163 states and 8778 transitions. [2021-06-05 18:23:31,354 INFO L78 Accepts]: Start accepts. Automaton has 3163 states and 8778 transitions. Word has length 125 [2021-06-05 18:23:31,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:31,354 INFO L482 AbstractCegarLoop]: Abstraction has 3163 states and 8778 transitions. [2021-06-05 18:23:31,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:31,355 INFO L276 IsEmpty]: Start isEmpty. Operand 3163 states and 8778 transitions. [2021-06-05 18:23:31,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:23:31,357 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:31,357 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:31,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-06-05 18:23:31,569 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:31,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:31,569 INFO L82 PathProgramCache]: Analyzing trace with hash -633967903, now seen corresponding path program 173 times [2021-06-05 18:23:31,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:31,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212364365] [2021-06-05 18:23:31,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:31,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:31,740 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:31,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:31,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212364365] [2021-06-05 18:23:31,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212364365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:31,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936082781] [2021-06-05 18:23:31,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:31,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:23:31,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:31,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:23:31,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:31,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936082781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:31,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:31,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 18:23:31,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916825200] [2021-06-05 18:23:31,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:23:31,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:31,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:23:31,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:23:31,931 INFO L87 Difference]: Start difference. First operand 3163 states and 8778 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:32,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:32,408 INFO L93 Difference]: Finished difference Result 4631 states and 11917 transitions. [2021-06-05 18:23:32,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:23:32,409 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:23:32,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:32,412 INFO L225 Difference]: With dead ends: 4631 [2021-06-05 18:23:32,413 INFO L226 Difference]: Without dead ends: 4361 [2021-06-05 18:23:32,414 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 485.5ms TimeCoverageRelationStatistics Valid=719, Invalid=2251, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 18:23:32,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4361 states. [2021-06-05 18:23:32,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4361 to 3238. [2021-06-05 18:23:32,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3238 states, 3237 states have (on average 2.7812789620018536) internal successors, (9003), 3237 states have internal predecessors, (9003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:32,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3238 states to 3238 states and 9003 transitions. [2021-06-05 18:23:32,447 INFO L78 Accepts]: Start accepts. Automaton has 3238 states and 9003 transitions. Word has length 125 [2021-06-05 18:23:32,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:32,448 INFO L482 AbstractCegarLoop]: Abstraction has 3238 states and 9003 transitions. [2021-06-05 18:23:32,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:32,448 INFO L276 IsEmpty]: Start isEmpty. Operand 3238 states and 9003 transitions. [2021-06-05 18:23:32,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:23:32,450 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:32,450 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:32,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:32,650 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:32,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:32,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1087881263, now seen corresponding path program 174 times [2021-06-05 18:23:32,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:32,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801388249] [2021-06-05 18:23:32,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:32,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:32,822 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:32,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:32,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801388249] [2021-06-05 18:23:32,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801388249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:32,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429819613] [2021-06-05 18:23:32,823 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:32,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:23:32,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:32,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:23:32,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:33,053 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:33,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429819613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:33,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:33,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:23:33,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513295372] [2021-06-05 18:23:33,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:23:33,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:33,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:23:33,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:23:33,054 INFO L87 Difference]: Start difference. First operand 3238 states and 9003 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:33,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:33,652 INFO L93 Difference]: Finished difference Result 4656 states and 12042 transitions. [2021-06-05 18:23:33,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:23:33,653 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:23:33,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:33,657 INFO L225 Difference]: With dead ends: 4656 [2021-06-05 18:23:33,657 INFO L226 Difference]: Without dead ends: 4386 [2021-06-05 18:23:33,657 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 579.0ms TimeCoverageRelationStatistics Valid=745, Invalid=2447, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 18:23:33,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2021-06-05 18:23:33,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 3313. [2021-06-05 18:23:33,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3313 states, 3312 states have (on average 2.786231884057971) internal successors, (9228), 3312 states have internal predecessors, (9228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:33,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3313 states to 3313 states and 9228 transitions. [2021-06-05 18:23:33,691 INFO L78 Accepts]: Start accepts. Automaton has 3313 states and 9228 transitions. Word has length 125 [2021-06-05 18:23:33,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:33,691 INFO L482 AbstractCegarLoop]: Abstraction has 3313 states and 9228 transitions. [2021-06-05 18:23:33,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:33,692 INFO L276 IsEmpty]: Start isEmpty. Operand 3313 states and 9228 transitions. [2021-06-05 18:23:33,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:23:33,694 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:33,694 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:33,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 18:23:33,894 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:33,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:33,894 INFO L82 PathProgramCache]: Analyzing trace with hash -209869345, now seen corresponding path program 175 times [2021-06-05 18:23:33,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:33,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841012196] [2021-06-05 18:23:33,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:33,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:34,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:34,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841012196] [2021-06-05 18:23:34,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841012196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:34,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379918660] [2021-06-05 18:23:34,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:34,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:34,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:23:34,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:34,249 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:34,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379918660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:34,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:34,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 18:23:34,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886741588] [2021-06-05 18:23:34,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:23:34,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:34,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:23:34,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:23:34,250 INFO L87 Difference]: Start difference. First operand 3313 states and 9228 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:34,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:34,764 INFO L93 Difference]: Finished difference Result 4681 states and 12167 transitions. [2021-06-05 18:23:34,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:23:34,764 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:23:34,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:34,768 INFO L225 Difference]: With dead ends: 4681 [2021-06-05 18:23:34,768 INFO L226 Difference]: Without dead ends: 4411 [2021-06-05 18:23:34,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 505.9ms TimeCoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 18:23:34,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4411 states. [2021-06-05 18:23:34,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4411 to 3388. [2021-06-05 18:23:34,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3388 states, 3387 states have (on average 2.7909654561558903) internal successors, (9453), 3387 states have internal predecessors, (9453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:34,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 9453 transitions. [2021-06-05 18:23:34,806 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 9453 transitions. Word has length 125 [2021-06-05 18:23:34,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:34,806 INFO L482 AbstractCegarLoop]: Abstraction has 3388 states and 9453 transitions. [2021-06-05 18:23:34,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:34,806 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 9453 transitions. [2021-06-05 18:23:34,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:23:34,808 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:34,808 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:35,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:35,009 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:35,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:35,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1109924145, now seen corresponding path program 176 times [2021-06-05 18:23:35,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:35,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661679792] [2021-06-05 18:23:35,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:35,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:35,187 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:35,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:35,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661679792] [2021-06-05 18:23:35,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661679792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:35,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552397481] [2021-06-05 18:23:35,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:35,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:23:35,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:35,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:23:35,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:35,409 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:35,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552397481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:35,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:35,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:23:35,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313263952] [2021-06-05 18:23:35,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:23:35,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:35,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:23:35,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:23:35,410 INFO L87 Difference]: Start difference. First operand 3388 states and 9453 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:36,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:36,124 INFO L93 Difference]: Finished difference Result 4706 states and 12292 transitions. [2021-06-05 18:23:36,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:23:36,124 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:23:36,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:36,128 INFO L225 Difference]: With dead ends: 4706 [2021-06-05 18:23:36,128 INFO L226 Difference]: Without dead ends: 4436 [2021-06-05 18:23:36,128 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 674.2ms TimeCoverageRelationStatistics Valid=815, Invalid=2607, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 18:23:36,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4436 states. [2021-06-05 18:23:36,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4436 to 3463. [2021-06-05 18:23:36,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3463 states, 3462 states have (on average 2.7954939341421143) internal successors, (9678), 3462 states have internal predecessors, (9678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:36,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3463 states to 3463 states and 9678 transitions. [2021-06-05 18:23:36,166 INFO L78 Accepts]: Start accepts. Automaton has 3463 states and 9678 transitions. Word has length 125 [2021-06-05 18:23:36,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:36,166 INFO L482 AbstractCegarLoop]: Abstraction has 3463 states and 9678 transitions. [2021-06-05 18:23:36,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:36,166 INFO L276 IsEmpty]: Start isEmpty. Operand 3463 states and 9678 transitions. [2021-06-05 18:23:36,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:23:36,169 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:36,169 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:36,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:36,377 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:36,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:36,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1538988451, now seen corresponding path program 177 times [2021-06-05 18:23:36,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:36,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513652734] [2021-06-05 18:23:36,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:36,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:36,545 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:36,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:36,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513652734] [2021-06-05 18:23:36,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513652734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:36,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130441056] [2021-06-05 18:23:36,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:36,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:23:36,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:36,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:23:36,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:36,741 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:36,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130441056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:36,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:36,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 18:23:36,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403033797] [2021-06-05 18:23:36,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:23:36,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:36,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:23:36,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:23:36,742 INFO L87 Difference]: Start difference. First operand 3463 states and 9678 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:37,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:37,294 INFO L93 Difference]: Finished difference Result 4731 states and 12417 transitions. [2021-06-05 18:23:37,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:23:37,294 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:23:37,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:37,299 INFO L225 Difference]: With dead ends: 4731 [2021-06-05 18:23:37,299 INFO L226 Difference]: Without dead ends: 4461 [2021-06-05 18:23:37,300 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 535.2ms TimeCoverageRelationStatistics Valid=871, Invalid=2551, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 18:23:37,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4461 states. [2021-06-05 18:23:37,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4461 to 3538. [2021-06-05 18:23:37,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3538 states, 3537 states have (on average 2.799830364715861) internal successors, (9903), 3537 states have internal predecessors, (9903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:37,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 9903 transitions. [2021-06-05 18:23:37,341 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 9903 transitions. Word has length 125 [2021-06-05 18:23:37,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:37,341 INFO L482 AbstractCegarLoop]: Abstraction has 3538 states and 9903 transitions. [2021-06-05 18:23:37,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:37,341 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 9903 transitions. [2021-06-05 18:23:37,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:23:37,344 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:37,344 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:37,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:37,560 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:37,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:37,560 INFO L82 PathProgramCache]: Analyzing trace with hash 2069795661, now seen corresponding path program 178 times [2021-06-05 18:23:37,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:37,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385146042] [2021-06-05 18:23:37,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:37,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:37,727 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:37,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:37,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385146042] [2021-06-05 18:23:37,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385146042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:37,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859889045] [2021-06-05 18:23:37,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:37,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:23:37,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:37,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:23:37,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:37,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859889045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:37,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:37,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:23:37,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011890128] [2021-06-05 18:23:37,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:23:37,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:37,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:23:37,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:23:37,932 INFO L87 Difference]: Start difference. First operand 3538 states and 9903 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:38,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:38,683 INFO L93 Difference]: Finished difference Result 4756 states and 12542 transitions. [2021-06-05 18:23:38,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 18:23:38,683 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:23:38,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:38,688 INFO L225 Difference]: With dead ends: 4756 [2021-06-05 18:23:38,688 INFO L226 Difference]: Without dead ends: 4486 [2021-06-05 18:23:38,689 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 717.4ms TimeCoverageRelationStatistics Valid=901, Invalid=2759, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 18:23:38,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4486 states. [2021-06-05 18:23:38,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4486 to 3613. [2021-06-05 18:23:38,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3613 states, 3612 states have (on average 2.8039867109634553) internal successors, (10128), 3612 states have internal predecessors, (10128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:38,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 10128 transitions. [2021-06-05 18:23:38,757 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 10128 transitions. Word has length 125 [2021-06-05 18:23:38,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:38,758 INFO L482 AbstractCegarLoop]: Abstraction has 3613 states and 10128 transitions. [2021-06-05 18:23:38,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:38,758 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 10128 transitions. [2021-06-05 18:23:38,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:23:38,760 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:38,761 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:38,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:38,973 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:38,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:38,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1984760923, now seen corresponding path program 179 times [2021-06-05 18:23:38,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:38,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70931009] [2021-06-05 18:23:38,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:39,136 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:39,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:39,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70931009] [2021-06-05 18:23:39,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70931009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:39,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179938214] [2021-06-05 18:23:39,137 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:39,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:23:39,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:39,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:23:39,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:39,326 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:39,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179938214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:39,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:39,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 18:23:39,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613442426] [2021-06-05 18:23:39,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:23:39,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:39,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:23:39,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:23:39,327 INFO L87 Difference]: Start difference. First operand 3613 states and 10128 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:39,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:39,901 INFO L93 Difference]: Finished difference Result 4781 states and 12667 transitions. [2021-06-05 18:23:39,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:23:39,901 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:23:39,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:39,906 INFO L225 Difference]: With dead ends: 4781 [2021-06-05 18:23:39,906 INFO L226 Difference]: Without dead ends: 4511 [2021-06-05 18:23:39,906 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 557.3ms TimeCoverageRelationStatistics Valid=971, Invalid=2689, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 18:23:39,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2021-06-05 18:23:39,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 3688. [2021-06-05 18:23:39,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3688 states, 3687 states have (on average 2.807973962571196) internal successors, (10353), 3687 states have internal predecessors, (10353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:39,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 10353 transitions. [2021-06-05 18:23:39,945 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 10353 transitions. Word has length 125 [2021-06-05 18:23:39,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:39,945 INFO L482 AbstractCegarLoop]: Abstraction has 3688 states and 10353 transitions. [2021-06-05 18:23:39,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:39,945 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 10353 transitions. [2021-06-05 18:23:39,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:23:39,948 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:39,948 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:40,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable187 [2021-06-05 18:23:40,148 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:40,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:40,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1916609867, now seen corresponding path program 180 times [2021-06-05 18:23:40,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:40,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219997790] [2021-06-05 18:23:40,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:40,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:40,314 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:40,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:40,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219997790] [2021-06-05 18:23:40,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219997790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:40,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397740714] [2021-06-05 18:23:40,315 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:40,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:23:40,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:40,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:23:40,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:40,522 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:40,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397740714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:40,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:40,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:23:40,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205859851] [2021-06-05 18:23:40,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:23:40,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:40,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:23:40,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:23:40,523 INFO L87 Difference]: Start difference. First operand 3688 states and 10353 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:41,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:41,224 INFO L93 Difference]: Finished difference Result 4806 states and 12792 transitions. [2021-06-05 18:23:41,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:23:41,224 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:23:41,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:41,229 INFO L225 Difference]: With dead ends: 4806 [2021-06-05 18:23:41,229 INFO L226 Difference]: Without dead ends: 4536 [2021-06-05 18:23:41,229 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 662.4ms TimeCoverageRelationStatistics Valid=937, Invalid=2969, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 18:23:41,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2021-06-05 18:23:41,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 3763. [2021-06-05 18:23:41,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3763 states, 3762 states have (on average 2.8118022328548644) internal successors, (10578), 3762 states have internal predecessors, (10578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:41,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3763 states to 3763 states and 10578 transitions. [2021-06-05 18:23:41,268 INFO L78 Accepts]: Start accepts. Automaton has 3763 states and 10578 transitions. Word has length 125 [2021-06-05 18:23:41,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:41,268 INFO L482 AbstractCegarLoop]: Abstraction has 3763 states and 10578 transitions. [2021-06-05 18:23:41,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:41,268 INFO L276 IsEmpty]: Start isEmpty. Operand 3763 states and 10578 transitions. [2021-06-05 18:23:41,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:23:41,271 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:41,271 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:41,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-06-05 18:23:41,471 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:41,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:41,472 INFO L82 PathProgramCache]: Analyzing trace with hash 619640793, now seen corresponding path program 181 times [2021-06-05 18:23:41,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:41,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439155046] [2021-06-05 18:23:41,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:41,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:41,648 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:41,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:41,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439155046] [2021-06-05 18:23:41,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439155046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:41,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192950182] [2021-06-05 18:23:41,649 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:41,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:23:41,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:41,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192950182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:41,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:41,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 18:23:41,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67259283] [2021-06-05 18:23:41,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:23:41,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:41,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:23:41,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:23:41,830 INFO L87 Difference]: Start difference. First operand 3763 states and 10578 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:42,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:42,438 INFO L93 Difference]: Finished difference Result 4831 states and 12917 transitions. [2021-06-05 18:23:42,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:23:42,438 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:23:42,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:42,442 INFO L225 Difference]: With dead ends: 4831 [2021-06-05 18:23:42,442 INFO L226 Difference]: Without dead ends: 4561 [2021-06-05 18:23:42,443 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 591.6ms TimeCoverageRelationStatistics Valid=1087, Invalid=2819, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 18:23:42,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2021-06-05 18:23:42,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 3838. [2021-06-05 18:23:42,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 2.815480844409695) internal successors, (10803), 3837 states have internal predecessors, (10803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:42,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 10803 transitions. [2021-06-05 18:23:42,482 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 10803 transitions. Word has length 125 [2021-06-05 18:23:42,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:42,482 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 10803 transitions. [2021-06-05 18:23:42,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:42,482 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 10803 transitions. [2021-06-05 18:23:42,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:23:42,485 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:42,485 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:42,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 18:23:42,685 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:42,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:42,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1049394377, now seen corresponding path program 182 times [2021-06-05 18:23:42,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:42,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854813024] [2021-06-05 18:23:42,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:42,847 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:42,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:42,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854813024] [2021-06-05 18:23:42,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854813024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:42,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524390507] [2021-06-05 18:23:42,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:42,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:23:42,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:42,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:23:42,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:43,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524390507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:43,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:43,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:23:43,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524857164] [2021-06-05 18:23:43,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:23:43,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:43,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:23:43,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:23:43,043 INFO L87 Difference]: Start difference. First operand 3838 states and 10803 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:43,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:43,818 INFO L93 Difference]: Finished difference Result 4916 states and 13207 transitions. [2021-06-05 18:23:43,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:23:43,818 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:23:43,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:43,823 INFO L225 Difference]: With dead ends: 4916 [2021-06-05 18:23:43,823 INFO L226 Difference]: Without dead ends: 4646 [2021-06-05 18:23:43,823 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 730.4ms TimeCoverageRelationStatistics Valid=1121, Invalid=3039, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 18:23:43,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4646 states. [2021-06-05 18:23:43,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4646 to 3913. [2021-06-05 18:23:43,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3913 states, 3912 states have (on average 2.8241308793456033) internal successors, (11048), 3912 states have internal predecessors, (11048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:43,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 11048 transitions. [2021-06-05 18:23:43,864 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 11048 transitions. Word has length 125 [2021-06-05 18:23:43,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:43,864 INFO L482 AbstractCegarLoop]: Abstraction has 3913 states and 11048 transitions. [2021-06-05 18:23:43,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:43,864 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 11048 transitions. [2021-06-05 18:23:43,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:23:43,867 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:43,867 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:44,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:44,068 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:44,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:44,069 INFO L82 PathProgramCache]: Analyzing trace with hash 991660247, now seen corresponding path program 183 times [2021-06-05 18:23:44,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:44,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771086561] [2021-06-05 18:23:44,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:44,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:44,229 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:44,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:44,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771086561] [2021-06-05 18:23:44,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771086561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:44,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779188594] [2021-06-05 18:23:44,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:44,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:23:44,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:44,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:23:44,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:44,435 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:44,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779188594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:44,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:44,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 18:23:44,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418147890] [2021-06-05 18:23:44,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:23:44,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:44,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:23:44,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:23:44,436 INFO L87 Difference]: Start difference. First operand 3913 states and 11048 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:45,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:45,073 INFO L93 Difference]: Finished difference Result 5658 states and 15331 transitions. [2021-06-05 18:23:45,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:23:45,073 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:23:45,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:45,079 INFO L225 Difference]: With dead ends: 5658 [2021-06-05 18:23:45,079 INFO L226 Difference]: Without dead ends: 5388 [2021-06-05 18:23:45,080 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 600.3ms TimeCoverageRelationStatistics Valid=1220, Invalid=2940, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 18:23:45,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5388 states. [2021-06-05 18:23:45,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5388 to 4093. [2021-06-05 18:23:45,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4093 states, 4092 states have (on average 2.8365102639296187) internal successors, (11607), 4092 states have internal predecessors, (11607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:45,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4093 states to 4093 states and 11607 transitions. [2021-06-05 18:23:45,122 INFO L78 Accepts]: Start accepts. Automaton has 4093 states and 11607 transitions. Word has length 125 [2021-06-05 18:23:45,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:45,123 INFO L482 AbstractCegarLoop]: Abstraction has 4093 states and 11607 transitions. [2021-06-05 18:23:45,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:45,123 INFO L276 IsEmpty]: Start isEmpty. Operand 4093 states and 11607 transitions. [2021-06-05 18:23:45,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:23:45,126 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:45,126 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:45,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:45,333 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:45,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:45,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1014003497, now seen corresponding path program 184 times [2021-06-05 18:23:45,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:45,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473069829] [2021-06-05 18:23:45,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:45,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:45,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:45,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473069829] [2021-06-05 18:23:45,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473069829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:45,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722515558] [2021-06-05 18:23:45,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:45,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:23:45,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:45,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:23:45,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:45,687 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:45,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722515558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:45,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:45,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:23:45,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034532332] [2021-06-05 18:23:45,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:23:45,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:45,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:23:45,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:23:45,688 INFO L87 Difference]: Start difference. First operand 4093 states and 11607 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:46,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:46,457 INFO L93 Difference]: Finished difference Result 5120 states and 13981 transitions. [2021-06-05 18:23:46,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:23:46,457 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:23:46,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:46,462 INFO L225 Difference]: With dead ends: 5120 [2021-06-05 18:23:46,462 INFO L226 Difference]: Without dead ends: 4631 [2021-06-05 18:23:46,463 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 745.9ms TimeCoverageRelationStatistics Valid=1258, Invalid=3164, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 18:23:46,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4631 states. [2021-06-05 18:23:46,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4631 to 2634. [2021-06-05 18:23:46,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2634 states, 2633 states have (on average 2.7406000759589824) internal successors, (7216), 2633 states have internal predecessors, (7216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:46,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2634 states to 2634 states and 7216 transitions. [2021-06-05 18:23:46,491 INFO L78 Accepts]: Start accepts. Automaton has 2634 states and 7216 transitions. Word has length 125 [2021-06-05 18:23:46,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:46,491 INFO L482 AbstractCegarLoop]: Abstraction has 2634 states and 7216 transitions. [2021-06-05 18:23:46,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:46,491 INFO L276 IsEmpty]: Start isEmpty. Operand 2634 states and 7216 transitions. [2021-06-05 18:23:46,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:23:46,493 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:46,493 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:46,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:46,693 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:46,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:46,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1934097443, now seen corresponding path program 185 times [2021-06-05 18:23:46,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:46,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018200766] [2021-06-05 18:23:46,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:46,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:46,895 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:46,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:46,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018200766] [2021-06-05 18:23:46,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018200766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:46,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097114802] [2021-06-05 18:23:46,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:46,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 18:23:46,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:46,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:23:46,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:47,139 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:47,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097114802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:47,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:47,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-05 18:23:47,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195443783] [2021-06-05 18:23:47,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:23:47,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:47,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:23:47,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:23:47,140 INFO L87 Difference]: Start difference. First operand 2634 states and 7216 transitions. Second operand has 28 states, 28 states have (on average 5.642857142857143) internal successors, (158), 28 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:47,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:47,583 INFO L93 Difference]: Finished difference Result 3774 states and 9816 transitions. [2021-06-05 18:23:47,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:23:47,583 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.642857142857143) internal successors, (158), 28 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:23:47,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:47,587 INFO L225 Difference]: With dead ends: 3774 [2021-06-05 18:23:47,587 INFO L226 Difference]: Without dead ends: 3440 [2021-06-05 18:23:47,587 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 504.1ms TimeCoverageRelationStatistics Valid=760, Invalid=2102, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 18:23:47,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2021-06-05 18:23:47,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 2719. [2021-06-05 18:23:47,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2719 states, 2718 states have (on average 2.717439293598234) internal successors, (7386), 2718 states have internal predecessors, (7386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:47,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2719 states to 2719 states and 7386 transitions. [2021-06-05 18:23:47,612 INFO L78 Accepts]: Start accepts. Automaton has 2719 states and 7386 transitions. Word has length 130 [2021-06-05 18:23:47,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:47,612 INFO L482 AbstractCegarLoop]: Abstraction has 2719 states and 7386 transitions. [2021-06-05 18:23:47,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.642857142857143) internal successors, (158), 28 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:47,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2719 states and 7386 transitions. [2021-06-05 18:23:47,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:23:47,614 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:47,614 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:47,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:47,814 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:47,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:47,815 INFO L82 PathProgramCache]: Analyzing trace with hash -2037815609, now seen corresponding path program 186 times [2021-06-05 18:23:47,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:47,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027264391] [2021-06-05 18:23:47,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:47,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:48,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:48,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027264391] [2021-06-05 18:23:48,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027264391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:48,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45296175] [2021-06-05 18:23:48,028 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:48,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 18:23:48,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:48,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:23:48,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:48,235 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:48,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45296175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:48,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:48,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 18:23:48,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413953494] [2021-06-05 18:23:48,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:23:48,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:48,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:23:48,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:23:48,236 INFO L87 Difference]: Start difference. First operand 2719 states and 7386 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:48,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:48,619 INFO L93 Difference]: Finished difference Result 4696 states and 11597 transitions. [2021-06-05 18:23:48,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:23:48,620 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:23:48,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:48,624 INFO L225 Difference]: With dead ends: 4696 [2021-06-05 18:23:48,624 INFO L226 Difference]: Without dead ends: 4426 [2021-06-05 18:23:48,624 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 455.9ms TimeCoverageRelationStatistics Valid=616, Invalid=1640, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:23:48,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4426 states. [2021-06-05 18:23:48,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4426 to 2863. [2021-06-05 18:23:48,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 2.7264150943396226) internal successors, (7803), 2862 states have internal predecessors, (7803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:48,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7803 transitions. [2021-06-05 18:23:48,653 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7803 transitions. Word has length 130 [2021-06-05 18:23:48,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:48,653 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 7803 transitions. [2021-06-05 18:23:48,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:48,653 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7803 transitions. [2021-06-05 18:23:48,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:23:48,655 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:48,655 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:48,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-05 18:23:48,855 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:48,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:48,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1614777271, now seen corresponding path program 187 times [2021-06-05 18:23:48,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:48,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250134583] [2021-06-05 18:23:48,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:49,086 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:49,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:49,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250134583] [2021-06-05 18:23:49,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250134583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:49,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852282175] [2021-06-05 18:23:49,086 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:49,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:49,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:23:49,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:49,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852282175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:49,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:49,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 18:23:49,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962822848] [2021-06-05 18:23:49,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:23:49,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:49,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:23:49,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:23:49,301 INFO L87 Difference]: Start difference. First operand 2863 states and 7803 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:49,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:49,738 INFO L93 Difference]: Finished difference Result 4656 states and 11592 transitions. [2021-06-05 18:23:49,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:23:49,739 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:23:49,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:49,742 INFO L225 Difference]: With dead ends: 4656 [2021-06-05 18:23:49,742 INFO L226 Difference]: Without dead ends: 4386 [2021-06-05 18:23:49,742 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 516.7ms TimeCoverageRelationStatistics Valid=683, Invalid=1969, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 18:23:49,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2021-06-05 18:23:49,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 2938. [2021-06-05 18:23:49,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 2.7334014300306437) internal successors, (8028), 2937 states have internal predecessors, (8028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:49,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 8028 transitions. [2021-06-05 18:23:49,769 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 8028 transitions. Word has length 130 [2021-06-05 18:23:49,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:49,769 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 8028 transitions. [2021-06-05 18:23:49,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:49,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 8028 transitions. [2021-06-05 18:23:49,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:23:49,771 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:49,771 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:49,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:49,972 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:49,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:49,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1568230341, now seen corresponding path program 188 times [2021-06-05 18:23:49,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:49,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613921428] [2021-06-05 18:23:49,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:49,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:50,176 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:50,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:50,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613921428] [2021-06-05 18:23:50,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613921428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:50,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508261383] [2021-06-05 18:23:50,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:50,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:23:50,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:50,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:23:50,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:50,395 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:50,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508261383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:50,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:50,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 18:23:50,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196866373] [2021-06-05 18:23:50,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:23:50,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:50,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:23:50,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:23:50,396 INFO L87 Difference]: Start difference. First operand 2938 states and 8028 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:50,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:50,799 INFO L93 Difference]: Finished difference Result 4706 states and 11767 transitions. [2021-06-05 18:23:50,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:23:50,800 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:23:50,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:50,804 INFO L225 Difference]: With dead ends: 4706 [2021-06-05 18:23:50,804 INFO L226 Difference]: Without dead ends: 4436 [2021-06-05 18:23:50,804 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 461.1ms TimeCoverageRelationStatistics Valid=621, Invalid=1829, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 18:23:50,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4436 states. [2021-06-05 18:23:50,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4436 to 3013. [2021-06-05 18:23:50,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3013 states, 3012 states have (on average 2.74003984063745) internal successors, (8253), 3012 states have internal predecessors, (8253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:50,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 8253 transitions. [2021-06-05 18:23:50,833 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 8253 transitions. Word has length 130 [2021-06-05 18:23:50,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:50,833 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 8253 transitions. [2021-06-05 18:23:50,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:50,833 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 8253 transitions. [2021-06-05 18:23:50,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:23:50,835 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:50,835 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:51,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:51,035 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:51,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:51,036 INFO L82 PathProgramCache]: Analyzing trace with hash 649845941, now seen corresponding path program 189 times [2021-06-05 18:23:51,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:51,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24979989] [2021-06-05 18:23:51,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:51,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:51,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:51,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24979989] [2021-06-05 18:23:51,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24979989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:51,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309198872] [2021-06-05 18:23:51,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:51,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 18:23:51,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:51,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:23:51,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:51,474 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:51,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309198872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:51,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:51,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 18:23:51,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733183731] [2021-06-05 18:23:51,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:23:51,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:51,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:23:51,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:23:51,475 INFO L87 Difference]: Start difference. First operand 3013 states and 8253 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:51,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:51,971 INFO L93 Difference]: Finished difference Result 4731 states and 11892 transitions. [2021-06-05 18:23:51,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:23:51,972 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:23:51,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:51,976 INFO L225 Difference]: With dead ends: 4731 [2021-06-05 18:23:51,976 INFO L226 Difference]: Without dead ends: 4461 [2021-06-05 18:23:51,976 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 553.3ms TimeCoverageRelationStatistics Valid=696, Invalid=2166, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 18:23:51,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4461 states. [2021-06-05 18:23:52,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4461 to 3088. [2021-06-05 18:23:52,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 2.746355685131195) internal successors, (8478), 3087 states have internal predecessors, (8478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:52,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 8478 transitions. [2021-06-05 18:23:52,008 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 8478 transitions. Word has length 130 [2021-06-05 18:23:52,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:52,008 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 8478 transitions. [2021-06-05 18:23:52,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:52,008 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 8478 transitions. [2021-06-05 18:23:52,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:23:52,010 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:52,010 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:52,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:52,211 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:52,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:52,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1126844861, now seen corresponding path program 190 times [2021-06-05 18:23:52,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:52,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958356509] [2021-06-05 18:23:52,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:52,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:52,406 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:52,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:52,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958356509] [2021-06-05 18:23:52,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958356509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:52,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956670601] [2021-06-05 18:23:52,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:52,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:23:52,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:52,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:23:52,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:52,624 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:52,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956670601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:52,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:52,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 18:23:52,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184758563] [2021-06-05 18:23:52,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:23:52,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:52,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:23:52,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:23:52,624 INFO L87 Difference]: Start difference. First operand 3088 states and 8478 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:53,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:53,047 INFO L93 Difference]: Finished difference Result 4756 states and 12017 transitions. [2021-06-05 18:23:53,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:23:53,048 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:23:53,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:53,052 INFO L225 Difference]: With dead ends: 4756 [2021-06-05 18:23:53,052 INFO L226 Difference]: Without dead ends: 4486 [2021-06-05 18:23:53,052 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 476.5ms TimeCoverageRelationStatistics Valid=642, Invalid=2010, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 18:23:53,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4486 states. [2021-06-05 18:23:53,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4486 to 3163. [2021-06-05 18:23:53,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3163 states, 3162 states have (on average 2.752371916508539) internal successors, (8703), 3162 states have internal predecessors, (8703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:53,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3163 states to 3163 states and 8703 transitions. [2021-06-05 18:23:53,086 INFO L78 Accepts]: Start accepts. Automaton has 3163 states and 8703 transitions. Word has length 130 [2021-06-05 18:23:53,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:53,086 INFO L482 AbstractCegarLoop]: Abstraction has 3163 states and 8703 transitions. [2021-06-05 18:23:53,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:53,086 INFO L276 IsEmpty]: Start isEmpty. Operand 3163 states and 8703 transitions. [2021-06-05 18:23:53,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:23:53,088 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:53,088 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:53,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:53,289 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:53,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:53,289 INFO L82 PathProgramCache]: Analyzing trace with hash 972796723, now seen corresponding path program 191 times [2021-06-05 18:23:53,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:53,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682487991] [2021-06-05 18:23:53,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:53,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:53,493 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:53,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:53,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682487991] [2021-06-05 18:23:53,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682487991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:53,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408099012] [2021-06-05 18:23:53,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:53,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 18:23:53,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:53,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:23:53,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:53,705 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:53,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408099012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:53,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:53,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 18:23:53,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412791384] [2021-06-05 18:23:53,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:23:53,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:53,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:23:53,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:23:53,706 INFO L87 Difference]: Start difference. First operand 3163 states and 8703 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:54,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:54,245 INFO L93 Difference]: Finished difference Result 4781 states and 12142 transitions. [2021-06-05 18:23:54,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:23:54,245 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:23:54,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:54,249 INFO L225 Difference]: With dead ends: 4781 [2021-06-05 18:23:54,249 INFO L226 Difference]: Without dead ends: 4511 [2021-06-05 18:23:54,249 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 581.6ms TimeCoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 18:23:54,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2021-06-05 18:23:54,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 3238. [2021-06-05 18:23:54,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3238 states, 3237 states have (on average 2.7581093605189992) internal successors, (8928), 3237 states have internal predecessors, (8928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:54,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3238 states to 3238 states and 8928 transitions. [2021-06-05 18:23:54,282 INFO L78 Accepts]: Start accepts. Automaton has 3238 states and 8928 transitions. Word has length 130 [2021-06-05 18:23:54,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:54,283 INFO L482 AbstractCegarLoop]: Abstraction has 3238 states and 8928 transitions. [2021-06-05 18:23:54,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:54,283 INFO L276 IsEmpty]: Start isEmpty. Operand 3238 states and 8928 transitions. [2021-06-05 18:23:54,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:23:54,285 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:54,285 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:54,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 18:23:54,485 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:54,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:54,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1811970495, now seen corresponding path program 192 times [2021-06-05 18:23:54,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:54,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657928615] [2021-06-05 18:23:54,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:54,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:54,675 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:54,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:54,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657928615] [2021-06-05 18:23:54,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657928615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:54,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728629966] [2021-06-05 18:23:54,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:54,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 18:23:54,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:54,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:23:54,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:54,887 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:54,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728629966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:54,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:54,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 18:23:54,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778293888] [2021-06-05 18:23:54,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:23:54,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:54,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:23:54,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:23:54,888 INFO L87 Difference]: Start difference. First operand 3238 states and 8928 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:55,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:55,379 INFO L93 Difference]: Finished difference Result 4806 states and 12267 transitions. [2021-06-05 18:23:55,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:23:55,379 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:23:55,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:55,383 INFO L225 Difference]: With dead ends: 4806 [2021-06-05 18:23:55,383 INFO L226 Difference]: Without dead ends: 4536 [2021-06-05 18:23:55,383 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 508.7ms TimeCoverageRelationStatistics Valid=679, Invalid=2183, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 18:23:55,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2021-06-05 18:23:55,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 3313. [2021-06-05 18:23:55,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3313 states, 3312 states have (on average 2.7635869565217392) internal successors, (9153), 3312 states have internal predecessors, (9153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:55,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3313 states to 3313 states and 9153 transitions. [2021-06-05 18:23:55,417 INFO L78 Accepts]: Start accepts. Automaton has 3313 states and 9153 transitions. Word has length 130 [2021-06-05 18:23:55,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:55,417 INFO L482 AbstractCegarLoop]: Abstraction has 3313 states and 9153 transitions. [2021-06-05 18:23:55,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:55,417 INFO L276 IsEmpty]: Start isEmpty. Operand 3313 states and 9153 transitions. [2021-06-05 18:23:55,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:23:55,419 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:55,419 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:55,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 18:23:55,620 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:55,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:55,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1172312271, now seen corresponding path program 193 times [2021-06-05 18:23:55,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:55,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166048470] [2021-06-05 18:23:55,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:55,817 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:55,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:55,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166048470] [2021-06-05 18:23:55,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166048470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:55,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200149521] [2021-06-05 18:23:55,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:55,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:23:55,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:56,028 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:56,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200149521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:56,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:56,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 18:23:56,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224611138] [2021-06-05 18:23:56,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:23:56,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:56,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:23:56,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:23:56,029 INFO L87 Difference]: Start difference. First operand 3313 states and 9153 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:56,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:56,631 INFO L93 Difference]: Finished difference Result 4831 states and 12392 transitions. [2021-06-05 18:23:56,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:23:56,631 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:23:56,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:56,635 INFO L225 Difference]: With dead ends: 4831 [2021-06-05 18:23:56,635 INFO L226 Difference]: Without dead ends: 4561 [2021-06-05 18:23:56,636 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 619.3ms TimeCoverageRelationStatistics Valid=770, Invalid=2536, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 18:23:56,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2021-06-05 18:23:56,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 3388. [2021-06-05 18:23:56,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3388 states, 3387 states have (on average 2.7688219663418954) internal successors, (9378), 3387 states have internal predecessors, (9378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:56,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 9378 transitions. [2021-06-05 18:23:56,670 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 9378 transitions. Word has length 130 [2021-06-05 18:23:56,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:56,670 INFO L482 AbstractCegarLoop]: Abstraction has 3388 states and 9378 transitions. [2021-06-05 18:23:56,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:56,670 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 9378 transitions. [2021-06-05 18:23:56,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:23:56,672 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:56,672 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:56,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 18:23:56,872 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:56,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:56,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1947231297, now seen corresponding path program 194 times [2021-06-05 18:23:56,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:56,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346945405] [2021-06-05 18:23:56,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:56,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:57,057 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:57,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:57,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346945405] [2021-06-05 18:23:57,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346945405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:57,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243006188] [2021-06-05 18:23:57,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:57,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:23:57,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:57,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:23:57,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:57,256 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:57,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243006188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:57,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:57,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 18:23:57,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499023334] [2021-06-05 18:23:57,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:23:57,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:57,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:23:57,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:23:57,257 INFO L87 Difference]: Start difference. First operand 3388 states and 9378 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:57,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:57,781 INFO L93 Difference]: Finished difference Result 4856 states and 12517 transitions. [2021-06-05 18:23:57,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:23:57,782 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:23:57,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:57,786 INFO L225 Difference]: With dead ends: 4856 [2021-06-05 18:23:57,786 INFO L226 Difference]: Without dead ends: 4586 [2021-06-05 18:23:57,787 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 528.2ms TimeCoverageRelationStatistics Valid=732, Invalid=2348, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 18:23:57,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4586 states. [2021-06-05 18:23:57,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4586 to 3463. [2021-06-05 18:23:57,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3463 states, 3462 states have (on average 2.7738301559792027) internal successors, (9603), 3462 states have internal predecessors, (9603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:57,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3463 states to 3463 states and 9603 transitions. [2021-06-05 18:23:57,836 INFO L78 Accepts]: Start accepts. Automaton has 3463 states and 9603 transitions. Word has length 130 [2021-06-05 18:23:57,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:57,836 INFO L482 AbstractCegarLoop]: Abstraction has 3463 states and 9603 transitions. [2021-06-05 18:23:57,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:57,837 INFO L276 IsEmpty]: Start isEmpty. Operand 3463 states and 9603 transitions. [2021-06-05 18:23:57,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:23:57,839 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:57,839 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:58,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 18:23:58,040 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:58,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:58,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1893822639, now seen corresponding path program 195 times [2021-06-05 18:23:58,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:58,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161985788] [2021-06-05 18:23:58,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:58,228 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:58,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:58,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161985788] [2021-06-05 18:23:58,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161985788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:58,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130570200] [2021-06-05 18:23:58,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:58,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 18:23:58,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:58,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:23:58,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:58,455 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:58,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130570200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:58,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:58,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 18:23:58,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814748843] [2021-06-05 18:23:58,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:23:58,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:58,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:23:58,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:23:58,456 INFO L87 Difference]: Start difference. First operand 3463 states and 9603 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:59,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:59,087 INFO L93 Difference]: Finished difference Result 4881 states and 12642 transitions. [2021-06-05 18:23:59,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:23:59,087 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:23:59,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:59,091 INFO L225 Difference]: With dead ends: 4881 [2021-06-05 18:23:59,091 INFO L226 Difference]: Without dead ends: 4611 [2021-06-05 18:23:59,092 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 623.5ms TimeCoverageRelationStatistics Valid=734, Invalid=2572, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 18:23:59,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4611 states. [2021-06-05 18:23:59,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4611 to 3538. [2021-06-05 18:23:59,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3538 states, 3537 states have (on average 2.7786259541984735) internal successors, (9828), 3537 states have internal predecessors, (9828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:59,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 9828 transitions. [2021-06-05 18:23:59,128 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 9828 transitions. Word has length 130 [2021-06-05 18:23:59,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:59,128 INFO L482 AbstractCegarLoop]: Abstraction has 3538 states and 9828 transitions. [2021-06-05 18:23:59,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:59,129 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 9828 transitions. [2021-06-05 18:23:59,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:23:59,131 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:59,131 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:23:59,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:59,332 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:59,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:59,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1523132739, now seen corresponding path program 196 times [2021-06-05 18:23:59,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:59,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875700597] [2021-06-05 18:23:59,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:59,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:59,511 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:59,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:59,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875700597] [2021-06-05 18:23:59,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875700597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:59,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013888003] [2021-06-05 18:23:59,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:59,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:23:59,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:59,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:23:59,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:59,712 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:59,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013888003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:59,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:59,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 18:23:59,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071361505] [2021-06-05 18:23:59,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:23:59,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:59,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:23:59,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:23:59,713 INFO L87 Difference]: Start difference. First operand 3538 states and 9828 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:00,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:00,270 INFO L93 Difference]: Finished difference Result 4906 states and 12767 transitions. [2021-06-05 18:24:00,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:24:00,271 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:24:00,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:00,275 INFO L225 Difference]: With dead ends: 4906 [2021-06-05 18:24:00,275 INFO L226 Difference]: Without dead ends: 4636 [2021-06-05 18:24:00,275 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 548.9ms TimeCoverageRelationStatistics Valid=801, Invalid=2505, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 18:24:00,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4636 states. [2021-06-05 18:24:00,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4636 to 3613. [2021-06-05 18:24:00,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3613 states, 3612 states have (on average 2.7832225913621262) internal successors, (10053), 3612 states have internal predecessors, (10053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:00,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 10053 transitions. [2021-06-05 18:24:00,312 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 10053 transitions. Word has length 130 [2021-06-05 18:24:00,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:00,312 INFO L482 AbstractCegarLoop]: Abstraction has 3613 states and 10053 transitions. [2021-06-05 18:24:00,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:00,312 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 10053 transitions. [2021-06-05 18:24:00,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:24:00,314 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:00,314 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:00,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-05 18:24:00,515 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:00,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:00,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1871779757, now seen corresponding path program 197 times [2021-06-05 18:24:00,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:00,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963036602] [2021-06-05 18:24:00,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:00,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:00,716 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:00,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:00,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963036602] [2021-06-05 18:24:00,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963036602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:00,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541021471] [2021-06-05 18:24:00,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:00,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 18:24:00,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:00,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:24:00,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:00,927 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:00,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541021471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:00,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:00,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 18:24:00,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783010881] [2021-06-05 18:24:00,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:24:00,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:00,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:24:00,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:24:00,928 INFO L87 Difference]: Start difference. First operand 3613 states and 10053 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:01,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:01,624 INFO L93 Difference]: Finished difference Result 4931 states and 12892 transitions. [2021-06-05 18:24:01,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 18:24:01,624 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:24:01,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:01,629 INFO L225 Difference]: With dead ends: 4931 [2021-06-05 18:24:01,629 INFO L226 Difference]: Without dead ends: 4661 [2021-06-05 18:24:01,629 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 706.1ms TimeCoverageRelationStatistics Valid=908, Invalid=2874, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 18:24:01,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4661 states. [2021-06-05 18:24:01,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4661 to 3688. [2021-06-05 18:24:01,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3688 states, 3687 states have (on average 2.787632221318145) internal successors, (10278), 3687 states have internal predecessors, (10278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:01,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 10278 transitions. [2021-06-05 18:24:01,666 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 10278 transitions. Word has length 130 [2021-06-05 18:24:01,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:01,666 INFO L482 AbstractCegarLoop]: Abstraction has 3688 states and 10278 transitions. [2021-06-05 18:24:01,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:01,666 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 10278 transitions. [2021-06-05 18:24:01,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:24:01,669 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:01,669 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:01,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:01,869 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:01,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:01,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1442715451, now seen corresponding path program 198 times [2021-06-05 18:24:01,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:01,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386028722] [2021-06-05 18:24:01,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:01,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:02,045 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:02,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:02,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386028722] [2021-06-05 18:24:02,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386028722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:02,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171253763] [2021-06-05 18:24:02,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:02,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 18:24:02,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:02,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:24:02,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:02,255 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:02,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171253763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:02,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:02,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 18:24:02,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810167339] [2021-06-05 18:24:02,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:24:02,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:02,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:24:02,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:24:02,256 INFO L87 Difference]: Start difference. First operand 3688 states and 10278 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:02,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:02,846 INFO L93 Difference]: Finished difference Result 4956 states and 13017 transitions. [2021-06-05 18:24:02,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:24:02,846 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:24:02,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:02,851 INFO L225 Difference]: With dead ends: 4956 [2021-06-05 18:24:02,851 INFO L226 Difference]: Without dead ends: 4686 [2021-06-05 18:24:02,851 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 572.4ms TimeCoverageRelationStatistics Valid=886, Invalid=2654, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 18:24:02,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4686 states. [2021-06-05 18:24:02,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4686 to 3763. [2021-06-05 18:24:02,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3763 states, 3762 states have (on average 2.791866028708134) internal successors, (10503), 3762 states have internal predecessors, (10503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:02,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3763 states to 3763 states and 10503 transitions. [2021-06-05 18:24:02,889 INFO L78 Accepts]: Start accepts. Automaton has 3763 states and 10503 transitions. Word has length 130 [2021-06-05 18:24:02,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:02,889 INFO L482 AbstractCegarLoop]: Abstraction has 3763 states and 10503 transitions. [2021-06-05 18:24:02,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:02,890 INFO L276 IsEmpty]: Start isEmpty. Operand 3763 states and 10503 transitions. [2021-06-05 18:24:02,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:24:02,892 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:02,892 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:03,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 18:24:03,093 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:03,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:03,093 INFO L82 PathProgramCache]: Analyzing trace with hash 756532267, now seen corresponding path program 199 times [2021-06-05 18:24:03,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:03,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617299616] [2021-06-05 18:24:03,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:03,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:03,277 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:03,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:03,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617299616] [2021-06-05 18:24:03,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617299616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:03,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404499257] [2021-06-05 18:24:03,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:03,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:03,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:24:03,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:03,526 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:03,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404499257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:03,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:03,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 18:24:03,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633712023] [2021-06-05 18:24:03,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:24:03,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:03,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:24:03,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:24:03,527 INFO L87 Difference]: Start difference. First operand 3763 states and 10503 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:04,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:04,286 INFO L93 Difference]: Finished difference Result 4981 states and 13142 transitions. [2021-06-05 18:24:04,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:24:04,286 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:24:04,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:04,291 INFO L225 Difference]: With dead ends: 4981 [2021-06-05 18:24:04,291 INFO L226 Difference]: Without dead ends: 4711 [2021-06-05 18:24:04,291 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 735.4ms TimeCoverageRelationStatistics Valid=1001, Invalid=3031, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 18:24:04,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4711 states. [2021-06-05 18:24:04,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4711 to 3838. [2021-06-05 18:24:04,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 2.7959343236903833) internal successors, (10728), 3837 states have internal predecessors, (10728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:04,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 10728 transitions. [2021-06-05 18:24:04,330 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 10728 transitions. Word has length 130 [2021-06-05 18:24:04,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:04,331 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 10728 transitions. [2021-06-05 18:24:04,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:04,331 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 10728 transitions. [2021-06-05 18:24:04,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:24:04,334 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:04,334 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:04,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:04,534 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:04,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:04,534 INFO L82 PathProgramCache]: Analyzing trace with hash 671497529, now seen corresponding path program 200 times [2021-06-05 18:24:04,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:04,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198637160] [2021-06-05 18:24:04,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:04,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:04,692 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:04,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:04,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198637160] [2021-06-05 18:24:04,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198637160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:04,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105826510] [2021-06-05 18:24:04,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:04,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:24:04,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:04,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:24:04,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:04,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105826510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:04,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:04,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 18:24:04,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327054983] [2021-06-05 18:24:04,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:24:04,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:04,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:24:04,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:24:04,895 INFO L87 Difference]: Start difference. First operand 3838 states and 10728 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:05,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:05,555 INFO L93 Difference]: Finished difference Result 5006 states and 13267 transitions. [2021-06-05 18:24:05,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:24:05,555 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:24:05,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:05,560 INFO L225 Difference]: With dead ends: 5006 [2021-06-05 18:24:05,560 INFO L226 Difference]: Without dead ends: 4736 [2021-06-05 18:24:05,560 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 589.5ms TimeCoverageRelationStatistics Valid=987, Invalid=2795, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 18:24:05,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4736 states. [2021-06-05 18:24:05,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4736 to 3913. [2021-06-05 18:24:05,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3913 states, 3912 states have (on average 2.7998466257668713) internal successors, (10953), 3912 states have internal predecessors, (10953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:05,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 10953 transitions. [2021-06-05 18:24:05,600 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 10953 transitions. Word has length 130 [2021-06-05 18:24:05,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:05,600 INFO L482 AbstractCegarLoop]: Abstraction has 3913 states and 10953 transitions. [2021-06-05 18:24:05,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:05,600 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 10953 transitions. [2021-06-05 18:24:05,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:24:05,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:05,603 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:05,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:05,803 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:05,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:05,803 INFO L82 PathProgramCache]: Analyzing trace with hash 603346473, now seen corresponding path program 201 times [2021-06-05 18:24:05,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:05,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385279886] [2021-06-05 18:24:05,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:05,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:05,980 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:05,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:05,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385279886] [2021-06-05 18:24:05,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385279886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:05,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911303992] [2021-06-05 18:24:05,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:06,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 18:24:06,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:06,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:24:06,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:06,205 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:06,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911303992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:06,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:06,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 18:24:06,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246590877] [2021-06-05 18:24:06,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:24:06,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:06,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:24:06,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:24:06,206 INFO L87 Difference]: Start difference. First operand 3913 states and 10953 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:06,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:06,971 INFO L93 Difference]: Finished difference Result 5031 states and 13392 transitions. [2021-06-05 18:24:06,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:24:06,971 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:24:06,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:06,976 INFO L225 Difference]: With dead ends: 5031 [2021-06-05 18:24:06,976 INFO L226 Difference]: Without dead ends: 4761 [2021-06-05 18:24:06,976 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 707.9ms TimeCoverageRelationStatistics Valid=950, Invalid=3082, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 18:24:06,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4761 states. [2021-06-05 18:24:07,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4761 to 3988. [2021-06-05 18:24:07,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3988 states, 3987 states have (on average 2.8036117381489842) internal successors, (11178), 3987 states have internal predecessors, (11178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:07,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3988 states to 3988 states and 11178 transitions. [2021-06-05 18:24:07,017 INFO L78 Accepts]: Start accepts. Automaton has 3988 states and 11178 transitions. Word has length 130 [2021-06-05 18:24:07,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:07,017 INFO L482 AbstractCegarLoop]: Abstraction has 3988 states and 11178 transitions. [2021-06-05 18:24:07,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:07,017 INFO L276 IsEmpty]: Start isEmpty. Operand 3988 states and 11178 transitions. [2021-06-05 18:24:07,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:24:07,020 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:07,020 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:07,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:07,220 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:07,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:07,220 INFO L82 PathProgramCache]: Analyzing trace with hash -693622601, now seen corresponding path program 202 times [2021-06-05 18:24:07,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:07,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834752915] [2021-06-05 18:24:07,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:07,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:07,392 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:07,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:07,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834752915] [2021-06-05 18:24:07,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834752915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:07,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40598804] [2021-06-05 18:24:07,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:07,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:24:07,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:07,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:24:07,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:07,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40598804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:07,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:07,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 18:24:07,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905592882] [2021-06-05 18:24:07,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:24:07,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:07,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:24:07,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:24:07,592 INFO L87 Difference]: Start difference. First operand 3988 states and 11178 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:08,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:08,271 INFO L93 Difference]: Finished difference Result 5056 states and 13517 transitions. [2021-06-05 18:24:08,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:24:08,272 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:24:08,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:08,277 INFO L225 Difference]: With dead ends: 5056 [2021-06-05 18:24:08,277 INFO L226 Difference]: Without dead ends: 4786 [2021-06-05 18:24:08,277 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 625.0ms TimeCoverageRelationStatistics Valid=1104, Invalid=2928, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 18:24:08,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4786 states. [2021-06-05 18:24:08,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4786 to 4063. [2021-06-05 18:24:08,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4063 states, 4062 states have (on average 2.807237813884786) internal successors, (11403), 4062 states have internal predecessors, (11403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:08,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4063 states to 4063 states and 11403 transitions. [2021-06-05 18:24:08,319 INFO L78 Accepts]: Start accepts. Automaton has 4063 states and 11403 transitions. Word has length 130 [2021-06-05 18:24:08,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:08,319 INFO L482 AbstractCegarLoop]: Abstraction has 4063 states and 11403 transitions. [2021-06-05 18:24:08,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:08,319 INFO L276 IsEmpty]: Start isEmpty. Operand 4063 states and 11403 transitions. [2021-06-05 18:24:08,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:24:08,322 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:08,322 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:08,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-05 18:24:08,522 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:08,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:08,523 INFO L82 PathProgramCache]: Analyzing trace with hash -263869017, now seen corresponding path program 203 times [2021-06-05 18:24:08,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:08,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240905441] [2021-06-05 18:24:08,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:08,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:08,697 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:08,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:08,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240905441] [2021-06-05 18:24:08,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240905441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:08,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63201990] [2021-06-05 18:24:08,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:08,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 18:24:08,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:08,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:24:08,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:08,920 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:08,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63201990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:08,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:08,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 18:24:08,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659839494] [2021-06-05 18:24:08,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:24:08,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:08,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:24:08,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:24:08,920 INFO L87 Difference]: Start difference. First operand 4063 states and 11403 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:09,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:09,806 INFO L93 Difference]: Finished difference Result 5141 states and 13807 transitions. [2021-06-05 18:24:09,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 18:24:09,806 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:24:09,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:09,811 INFO L225 Difference]: With dead ends: 5141 [2021-06-05 18:24:09,811 INFO L226 Difference]: Without dead ends: 4871 [2021-06-05 18:24:09,812 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 822.5ms TimeCoverageRelationStatistics Valid=1235, Invalid=3321, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 18:24:09,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4871 states. [2021-06-05 18:24:09,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4871 to 4138. [2021-06-05 18:24:09,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4138 states, 4137 states have (on average 2.8155668358714045) internal successors, (11648), 4137 states have internal predecessors, (11648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:09,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4138 states to 4138 states and 11648 transitions. [2021-06-05 18:24:09,854 INFO L78 Accepts]: Start accepts. Automaton has 4138 states and 11648 transitions. Word has length 130 [2021-06-05 18:24:09,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:09,854 INFO L482 AbstractCegarLoop]: Abstraction has 4138 states and 11648 transitions. [2021-06-05 18:24:09,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:09,854 INFO L276 IsEmpty]: Start isEmpty. Operand 4138 states and 11648 transitions. [2021-06-05 18:24:09,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:24:09,857 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:09,857 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:10,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 18:24:10,058 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:10,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:10,058 INFO L82 PathProgramCache]: Analyzing trace with hash -321603147, now seen corresponding path program 204 times [2021-06-05 18:24:10,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:10,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110131822] [2021-06-05 18:24:10,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:10,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:10,234 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:10,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:10,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110131822] [2021-06-05 18:24:10,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110131822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:10,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989045502] [2021-06-05 18:24:10,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:10,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 18:24:10,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:10,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:24:10,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:10,433 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:10,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989045502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:10,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:10,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 18:24:10,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235632886] [2021-06-05 18:24:10,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:24:10,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:10,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:24:10,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:24:10,434 INFO L87 Difference]: Start difference. First operand 4138 states and 11648 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:11,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:11,147 INFO L93 Difference]: Finished difference Result 5908 states and 15981 transitions. [2021-06-05 18:24:11,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:24:11,147 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:24:11,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:11,153 INFO L225 Difference]: With dead ends: 5908 [2021-06-05 18:24:11,153 INFO L226 Difference]: Without dead ends: 5638 [2021-06-05 18:24:11,153 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 660.9ms TimeCoverageRelationStatistics Valid=1238, Invalid=3052, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 18:24:11,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5638 states. [2021-06-05 18:24:11,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5638 to 4318. [2021-06-05 18:24:11,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4318 states, 4317 states have (on average 2.8276580958999307) internal successors, (12207), 4317 states have internal predecessors, (12207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:11,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4318 states to 4318 states and 12207 transitions. [2021-06-05 18:24:11,195 INFO L78 Accepts]: Start accepts. Automaton has 4318 states and 12207 transitions. Word has length 130 [2021-06-05 18:24:11,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:11,196 INFO L482 AbstractCegarLoop]: Abstraction has 4318 states and 12207 transitions. [2021-06-05 18:24:11,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:11,196 INFO L276 IsEmpty]: Start isEmpty. Operand 4318 states and 12207 transitions. [2021-06-05 18:24:11,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:24:11,198 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:11,199 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:11,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 18:24:11,399 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:11,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:11,399 INFO L82 PathProgramCache]: Analyzing trace with hash -299259897, now seen corresponding path program 205 times [2021-06-05 18:24:11,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:11,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969363287] [2021-06-05 18:24:11,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:11,595 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:11,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:11,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969363287] [2021-06-05 18:24:11,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969363287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:11,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669907935] [2021-06-05 18:24:11,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:11,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:24:11,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:11,807 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:11,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669907935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:11,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:11,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 18:24:11,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815407158] [2021-06-05 18:24:11,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:24:11,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:11,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:24:11,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:24:11,808 INFO L87 Difference]: Start difference. First operand 4318 states and 12207 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:12,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:12,712 INFO L93 Difference]: Finished difference Result 5395 states and 14681 transitions. [2021-06-05 18:24:12,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 18:24:12,712 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:24:12,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:12,717 INFO L225 Difference]: With dead ends: 5395 [2021-06-05 18:24:12,717 INFO L226 Difference]: Without dead ends: 4906 [2021-06-05 18:24:12,717 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 867.8ms TimeCoverageRelationStatistics Valid=1379, Invalid=3451, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 18:24:12,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4906 states. [2021-06-05 18:24:12,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4906 to 2913. [2021-06-05 18:24:12,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2912 states have (on average 2.739697802197802) internal successors, (7978), 2912 states have internal predecessors, (7978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:12,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 7978 transitions. [2021-06-05 18:24:12,747 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 7978 transitions. Word has length 130 [2021-06-05 18:24:12,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:12,747 INFO L482 AbstractCegarLoop]: Abstraction has 2913 states and 7978 transitions. [2021-06-05 18:24:12,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:12,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 7978 transitions. [2021-06-05 18:24:12,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:24:12,749 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:12,749 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:12,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 18:24:12,950 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:12,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:12,950 INFO L82 PathProgramCache]: Analyzing trace with hash 750131032, now seen corresponding path program 206 times [2021-06-05 18:24:12,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:12,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812934097] [2021-06-05 18:24:12,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:12,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:13,172 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:13,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:13,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812934097] [2021-06-05 18:24:13,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812934097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:13,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743482242] [2021-06-05 18:24:13,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:13,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:24:13,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:13,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:24:13,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:13,401 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:13,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743482242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:13,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:13,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-05 18:24:13,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870054463] [2021-06-05 18:24:13,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 18:24:13,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:13,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 18:24:13,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:24:13,402 INFO L87 Difference]: Start difference. First operand 2913 states and 7978 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:13,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:13,863 INFO L93 Difference]: Finished difference Result 4331 states and 11017 transitions. [2021-06-05 18:24:13,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:24:13,864 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-05 18:24:13,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:13,867 INFO L225 Difference]: With dead ends: 4331 [2021-06-05 18:24:13,868 INFO L226 Difference]: Without dead ends: 4061 [2021-06-05 18:24:13,868 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 510.5ms TimeCoverageRelationStatistics Valid=722, Invalid=2034, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 18:24:13,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4061 states. [2021-06-05 18:24:13,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4061 to 2988. [2021-06-05 18:24:13,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2988 states, 2987 states have (on average 2.7462336792768665) internal successors, (8203), 2987 states have internal predecessors, (8203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:13,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2988 states to 2988 states and 8203 transitions. [2021-06-05 18:24:13,897 INFO L78 Accepts]: Start accepts. Automaton has 2988 states and 8203 transitions. Word has length 135 [2021-06-05 18:24:13,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:13,897 INFO L482 AbstractCegarLoop]: Abstraction has 2988 states and 8203 transitions. [2021-06-05 18:24:13,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:13,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2988 states and 8203 transitions. [2021-06-05 18:24:13,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:24:13,899 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:13,899 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:14,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-06-05 18:24:14,100 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:14,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:14,100 INFO L82 PathProgramCache]: Analyzing trace with hash 107756616, now seen corresponding path program 207 times [2021-06-05 18:24:14,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:14,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278649315] [2021-06-05 18:24:14,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:14,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:14,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:14,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278649315] [2021-06-05 18:24:14,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278649315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:14,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964556770] [2021-06-05 18:24:14,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:14,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 18:24:14,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:14,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:24:14,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:14,593 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:14,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964556770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:14,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:14,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-05 18:24:14,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150201651] [2021-06-05 18:24:14,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:24:14,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:14,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:24:14,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:24:14,593 INFO L87 Difference]: Start difference. First operand 2988 states and 8203 transitions. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:15,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:15,093 INFO L93 Difference]: Finished difference Result 4851 states and 12132 transitions. [2021-06-05 18:24:15,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:24:15,093 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-05 18:24:15,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:15,097 INFO L225 Difference]: With dead ends: 4851 [2021-06-05 18:24:15,097 INFO L226 Difference]: Without dead ends: 4581 [2021-06-05 18:24:15,098 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 583.3ms TimeCoverageRelationStatistics Valid=780, Invalid=2300, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 18:24:15,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4581 states. [2021-06-05 18:24:15,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4581 to 3063. [2021-06-05 18:24:15,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 3062 states have (on average 2.752449379490529) internal successors, (8428), 3062 states have internal predecessors, (8428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:15,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 8428 transitions. [2021-06-05 18:24:15,127 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 8428 transitions. Word has length 135 [2021-06-05 18:24:15,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:15,128 INFO L482 AbstractCegarLoop]: Abstraction has 3063 states and 8428 transitions. [2021-06-05 18:24:15,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:15,128 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 8428 transitions. [2021-06-05 18:24:15,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:24:15,130 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:15,130 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:15,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:15,330 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:15,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:15,331 INFO L82 PathProgramCache]: Analyzing trace with hash 61209686, now seen corresponding path program 208 times [2021-06-05 18:24:15,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:15,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810286401] [2021-06-05 18:24:15,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:15,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:15,546 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:15,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:15,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810286401] [2021-06-05 18:24:15,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810286401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:15,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423296326] [2021-06-05 18:24:15,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:15,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:24:15,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:15,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:24:15,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:15,769 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:15,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423296326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:15,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:15,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-05 18:24:15,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345052340] [2021-06-05 18:24:15,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 18:24:15,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:15,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 18:24:15,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:24:15,770 INFO L87 Difference]: Start difference. First operand 3063 states and 8428 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:16,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:16,318 INFO L93 Difference]: Finished difference Result 4881 states and 12267 transitions. [2021-06-05 18:24:16,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:24:16,318 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-05 18:24:16,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:16,322 INFO L225 Difference]: With dead ends: 4881 [2021-06-05 18:24:16,322 INFO L226 Difference]: Without dead ends: 4611 [2021-06-05 18:24:16,322 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 592.8ms TimeCoverageRelationStatistics Valid=776, Invalid=2304, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 18:24:16,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4611 states. [2021-06-05 18:24:16,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4611 to 3138. [2021-06-05 18:24:16,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3138 states, 3137 states have (on average 2.7583678673892256) internal successors, (8653), 3137 states have internal predecessors, (8653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:16,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3138 states to 3138 states and 8653 transitions. [2021-06-05 18:24:16,353 INFO L78 Accepts]: Start accepts. Automaton has 3138 states and 8653 transitions. Word has length 135 [2021-06-05 18:24:16,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:16,353 INFO L482 AbstractCegarLoop]: Abstraction has 3138 states and 8653 transitions. [2021-06-05 18:24:16,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:16,353 INFO L276 IsEmpty]: Start isEmpty. Operand 3138 states and 8653 transitions. [2021-06-05 18:24:16,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:24:16,355 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:16,355 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:16,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-05 18:24:16,556 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:16,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:16,556 INFO L82 PathProgramCache]: Analyzing trace with hash -857174714, now seen corresponding path program 209 times [2021-06-05 18:24:16,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:16,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919395547] [2021-06-05 18:24:16,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:16,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:16,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919395547] [2021-06-05 18:24:16,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919395547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:16,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173337392] [2021-06-05 18:24:16,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:16,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 18:24:16,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:16,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:24:16,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:17,040 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:17,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173337392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:17,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:17,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-05 18:24:17,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655857630] [2021-06-05 18:24:17,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:24:17,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:17,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:24:17,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:24:17,040 INFO L87 Difference]: Start difference. First operand 3138 states and 8653 transitions. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:17,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:17,594 INFO L93 Difference]: Finished difference Result 4906 states and 12392 transitions. [2021-06-05 18:24:17,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:24:17,595 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-05 18:24:17,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:17,598 INFO L225 Difference]: With dead ends: 4906 [2021-06-05 18:24:17,599 INFO L226 Difference]: Without dead ends: 4636 [2021-06-05 18:24:17,599 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 606.8ms TimeCoverageRelationStatistics Valid=799, Invalid=2507, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 18:24:17,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4636 states. [2021-06-05 18:24:17,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4636 to 3213. [2021-06-05 18:24:17,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3213 states, 3212 states have (on average 2.7640099626401) internal successors, (8878), 3212 states have internal predecessors, (8878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:17,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3213 states to 3213 states and 8878 transitions. [2021-06-05 18:24:17,630 INFO L78 Accepts]: Start accepts. Automaton has 3213 states and 8878 transitions. Word has length 135 [2021-06-05 18:24:17,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:17,630 INFO L482 AbstractCegarLoop]: Abstraction has 3213 states and 8878 transitions. [2021-06-05 18:24:17,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:17,630 INFO L276 IsEmpty]: Start isEmpty. Operand 3213 states and 8878 transitions. [2021-06-05 18:24:17,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:24:17,632 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:17,632 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:17,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:17,833 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:17,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:17,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1661101780, now seen corresponding path program 210 times [2021-06-05 18:24:17,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:17,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845461111] [2021-06-05 18:24:17,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:17,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:18,044 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:18,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:18,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845461111] [2021-06-05 18:24:18,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845461111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:18,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210401672] [2021-06-05 18:24:18,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:18,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 18:24:18,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:18,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:24:18,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:18,295 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:18,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210401672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:18,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:18,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-05 18:24:18,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140664340] [2021-06-05 18:24:18,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 18:24:18,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:18,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 18:24:18,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:24:18,296 INFO L87 Difference]: Start difference. First operand 3213 states and 8878 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:18,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:18,846 INFO L93 Difference]: Finished difference Result 4931 states and 12517 transitions. [2021-06-05 18:24:18,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:24:18,847 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-05 18:24:18,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:18,851 INFO L225 Difference]: With dead ends: 4931 [2021-06-05 18:24:18,851 INFO L226 Difference]: Without dead ends: 4661 [2021-06-05 18:24:18,851 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 575.9ms TimeCoverageRelationStatistics Valid=809, Invalid=2497, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 18:24:18,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4661 states. [2021-06-05 18:24:18,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4661 to 3288. [2021-06-05 18:24:18,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3288 states, 3287 states have (on average 2.7693945847277153) internal successors, (9103), 3287 states have internal predecessors, (9103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:18,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3288 states to 3288 states and 9103 transitions. [2021-06-05 18:24:18,885 INFO L78 Accepts]: Start accepts. Automaton has 3288 states and 9103 transitions. Word has length 135 [2021-06-05 18:24:18,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:18,885 INFO L482 AbstractCegarLoop]: Abstraction has 3288 states and 9103 transitions. [2021-06-05 18:24:18,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:18,885 INFO L276 IsEmpty]: Start isEmpty. Operand 3288 states and 9103 transitions. [2021-06-05 18:24:18,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:24:18,887 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:18,888 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:19,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:19,088 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:19,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:19,088 INFO L82 PathProgramCache]: Analyzing trace with hash -534223932, now seen corresponding path program 211 times [2021-06-05 18:24:19,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:19,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041408808] [2021-06-05 18:24:19,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:19,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:19,303 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:19,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:19,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041408808] [2021-06-05 18:24:19,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041408808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:19,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154241428] [2021-06-05 18:24:19,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:19,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:19,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:24:19,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:19,541 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:19,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154241428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:19,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:19,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-05 18:24:19,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888092680] [2021-06-05 18:24:19,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:24:19,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:19,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:24:19,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:24:19,542 INFO L87 Difference]: Start difference. First operand 3288 states and 9103 transitions. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:20,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:20,134 INFO L93 Difference]: Finished difference Result 4956 states and 12642 transitions. [2021-06-05 18:24:20,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:24:20,134 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-05 18:24:20,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:20,139 INFO L225 Difference]: With dead ends: 4956 [2021-06-05 18:24:20,139 INFO L226 Difference]: Without dead ends: 4686 [2021-06-05 18:24:20,139 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 645.1ms TimeCoverageRelationStatistics Valid=834, Invalid=2706, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 18:24:20,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4686 states. [2021-06-05 18:24:20,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4686 to 3363. [2021-06-05 18:24:20,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3363 states, 3362 states have (on average 2.774538964901844) internal successors, (9328), 3362 states have internal predecessors, (9328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:20,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3363 states to 3363 states and 9328 transitions. [2021-06-05 18:24:20,175 INFO L78 Accepts]: Start accepts. Automaton has 3363 states and 9328 transitions. Word has length 135 [2021-06-05 18:24:20,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:20,175 INFO L482 AbstractCegarLoop]: Abstraction has 3363 states and 9328 transitions. [2021-06-05 18:24:20,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:20,175 INFO L276 IsEmpty]: Start isEmpty. Operand 3363 states and 9328 transitions. [2021-06-05 18:24:20,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:24:20,177 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:20,177 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:20,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:20,378 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:20,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:20,378 INFO L82 PathProgramCache]: Analyzing trace with hash 975976146, now seen corresponding path program 212 times [2021-06-05 18:24:20,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:20,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314220602] [2021-06-05 18:24:20,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:20,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:20,588 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:20,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:20,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314220602] [2021-06-05 18:24:20,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314220602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:20,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786382312] [2021-06-05 18:24:20,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:20,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:24:20,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:20,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:24:20,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:20,806 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:20,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786382312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:20,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:20,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-05 18:24:20,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330108206] [2021-06-05 18:24:20,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 18:24:20,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:20,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 18:24:20,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:24:20,807 INFO L87 Difference]: Start difference. First operand 3363 states and 9328 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:21,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:21,316 INFO L93 Difference]: Finished difference Result 4981 states and 12767 transitions. [2021-06-05 18:24:21,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:24:21,316 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-05 18:24:21,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:21,320 INFO L225 Difference]: With dead ends: 4981 [2021-06-05 18:24:21,320 INFO L226 Difference]: Without dead ends: 4711 [2021-06-05 18:24:21,321 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 569.6ms TimeCoverageRelationStatistics Valid=858, Invalid=2682, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 18:24:21,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4711 states. [2021-06-05 18:24:21,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4711 to 3438. [2021-06-05 18:24:21,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 3437 states have (on average 2.779458830375327) internal successors, (9553), 3437 states have internal predecessors, (9553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:21,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 9553 transitions. [2021-06-05 18:24:21,354 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 9553 transitions. Word has length 135 [2021-06-05 18:24:21,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:21,355 INFO L482 AbstractCegarLoop]: Abstraction has 3438 states and 9553 transitions. [2021-06-05 18:24:21,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:21,355 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 9553 transitions. [2021-06-05 18:24:21,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:24:21,357 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:21,357 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:21,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:21,558 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:21,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:21,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1615634370, now seen corresponding path program 213 times [2021-06-05 18:24:21,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:21,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258119045] [2021-06-05 18:24:21,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:21,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:21,757 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:21,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:21,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258119045] [2021-06-05 18:24:21,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258119045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:21,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27231088] [2021-06-05 18:24:21,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:21,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 18:24:21,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:21,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 18:24:21,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:21,991 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:21,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27231088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:21,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:21,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-05 18:24:21,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180211481] [2021-06-05 18:24:21,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:24:21,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:21,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:24:21,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:24:21,992 INFO L87 Difference]: Start difference. First operand 3438 states and 9553 transitions. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:22,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:22,623 INFO L93 Difference]: Finished difference Result 5006 states and 12892 transitions. [2021-06-05 18:24:22,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:24:22,623 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-05 18:24:22,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:22,626 INFO L225 Difference]: With dead ends: 5006 [2021-06-05 18:24:22,627 INFO L226 Difference]: Without dead ends: 4736 [2021-06-05 18:24:22,627 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 665.8ms TimeCoverageRelationStatistics Valid=864, Invalid=2918, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 18:24:22,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4736 states. [2021-06-05 18:24:22,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4736 to 3513. [2021-06-05 18:24:22,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3513 states, 3512 states have (on average 2.7841685649202734) internal successors, (9778), 3512 states have internal predecessors, (9778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:22,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 9778 transitions. [2021-06-05 18:24:22,661 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 9778 transitions. Word has length 135 [2021-06-05 18:24:22,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:22,661 INFO L482 AbstractCegarLoop]: Abstraction has 3513 states and 9778 transitions. [2021-06-05 18:24:22,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:22,661 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 9778 transitions. [2021-06-05 18:24:22,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:24:22,664 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:22,664 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:22,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 18:24:22,864 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:22,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:22,864 INFO L82 PathProgramCache]: Analyzing trace with hash 840715344, now seen corresponding path program 214 times [2021-06-05 18:24:22,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:22,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434227969] [2021-06-05 18:24:22,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:22,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:23,057 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:23,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:23,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434227969] [2021-06-05 18:24:23,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434227969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:23,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313664306] [2021-06-05 18:24:23,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:23,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:24:23,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:23,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:24:23,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:23,283 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:23,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313664306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:23,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:23,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-05 18:24:23,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52252724] [2021-06-05 18:24:23,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 18:24:23,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:23,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 18:24:23,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:24:23,284 INFO L87 Difference]: Start difference. First operand 3513 states and 9778 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:23,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:23,841 INFO L93 Difference]: Finished difference Result 5031 states and 13017 transitions. [2021-06-05 18:24:23,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:24:23,842 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-05 18:24:23,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:23,846 INFO L225 Difference]: With dead ends: 5031 [2021-06-05 18:24:23,846 INFO L226 Difference]: Without dead ends: 4761 [2021-06-05 18:24:23,846 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 576.9ms TimeCoverageRelationStatistics Valid=923, Invalid=2859, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 18:24:23,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4761 states. [2021-06-05 18:24:23,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4761 to 3588. [2021-06-05 18:24:23,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3588 states, 3587 states have (on average 2.788681349316978) internal successors, (10003), 3587 states have internal predecessors, (10003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:23,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3588 states to 3588 states and 10003 transitions. [2021-06-05 18:24:23,886 INFO L78 Accepts]: Start accepts. Automaton has 3588 states and 10003 transitions. Word has length 135 [2021-06-05 18:24:23,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:23,886 INFO L482 AbstractCegarLoop]: Abstraction has 3588 states and 10003 transitions. [2021-06-05 18:24:23,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:23,886 INFO L276 IsEmpty]: Start isEmpty. Operand 3588 states and 10003 transitions. [2021-06-05 18:24:23,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:24:23,889 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:23,889 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:24,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-06-05 18:24:24,089 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:24,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:24,089 INFO L82 PathProgramCache]: Analyzing trace with hash 386801984, now seen corresponding path program 215 times [2021-06-05 18:24:24,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:24,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355053979] [2021-06-05 18:24:24,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:24,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:24,289 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:24,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:24,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355053979] [2021-06-05 18:24:24,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355053979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:24,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593140725] [2021-06-05 18:24:24,290 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:24,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 18:24:24,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:24,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:24:24,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:24,521 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:24,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593140725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:24,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:24,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-05 18:24:24,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320036791] [2021-06-05 18:24:24,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:24:24,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:24,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:24:24,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:24:24,522 INFO L87 Difference]: Start difference. First operand 3588 states and 10003 transitions. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:25,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:25,230 INFO L93 Difference]: Finished difference Result 5056 states and 13142 transitions. [2021-06-05 18:24:25,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 18:24:25,231 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-05 18:24:25,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:25,234 INFO L225 Difference]: With dead ends: 5056 [2021-06-05 18:24:25,234 INFO L226 Difference]: Without dead ends: 4786 [2021-06-05 18:24:25,235 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 706.8ms TimeCoverageRelationStatistics Valid=952, Invalid=3080, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 18:24:25,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4786 states. [2021-06-05 18:24:25,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4786 to 3663. [2021-06-05 18:24:25,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3663 states, 3662 states have (on average 2.793009284543965) internal successors, (10228), 3662 states have internal predecessors, (10228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:25,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 10228 transitions. [2021-06-05 18:24:25,270 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 10228 transitions. Word has length 135 [2021-06-05 18:24:25,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:25,270 INFO L482 AbstractCegarLoop]: Abstraction has 3663 states and 10228 transitions. [2021-06-05 18:24:25,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:25,270 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 10228 transitions. [2021-06-05 18:24:25,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:24:25,273 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:25,273 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:25,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 18:24:25,477 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:25,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:25,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1264813902, now seen corresponding path program 216 times [2021-06-05 18:24:25,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:25,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225917337] [2021-06-05 18:24:25,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:25,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:25,652 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:25,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:25,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225917337] [2021-06-05 18:24:25,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225917337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:25,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521517663] [2021-06-05 18:24:25,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:25,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 18:24:25,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:25,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:24:25,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:25,871 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:25,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521517663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:25,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:25,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-05 18:24:25,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206984782] [2021-06-05 18:24:25,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 18:24:25,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:25,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 18:24:25,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:24:25,872 INFO L87 Difference]: Start difference. First operand 3663 states and 10228 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:26,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:26,465 INFO L93 Difference]: Finished difference Result 5081 states and 13267 transitions. [2021-06-05 18:24:26,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:24:26,465 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-05 18:24:26,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:26,470 INFO L225 Difference]: With dead ends: 5081 [2021-06-05 18:24:26,470 INFO L226 Difference]: Without dead ends: 4811 [2021-06-05 18:24:26,470 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 587.6ms TimeCoverageRelationStatistics Valid=1004, Invalid=3028, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 18:24:26,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4811 states. [2021-06-05 18:24:26,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4811 to 3738. [2021-06-05 18:24:26,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3738 states, 3737 states have (on average 2.7971635001337973) internal successors, (10453), 3737 states have internal predecessors, (10453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:26,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 10453 transitions. [2021-06-05 18:24:26,508 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 10453 transitions. Word has length 135 [2021-06-05 18:24:26,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:26,508 INFO L482 AbstractCegarLoop]: Abstraction has 3738 states and 10453 transitions. [2021-06-05 18:24:26,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:26,508 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 10453 transitions. [2021-06-05 18:24:26,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:24:26,511 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:26,511 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:26,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-05 18:24:26,711 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:26,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:26,711 INFO L82 PathProgramCache]: Analyzing trace with hash 364759102, now seen corresponding path program 217 times [2021-06-05 18:24:26,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:26,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484961224] [2021-06-05 18:24:26,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:26,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:26,903 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:26,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:26,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484961224] [2021-06-05 18:24:26,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484961224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:26,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925164646] [2021-06-05 18:24:26,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:26,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:24:26,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:27,130 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:27,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925164646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:27,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:27,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-05 18:24:27,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792451302] [2021-06-05 18:24:27,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:24:27,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:27,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:24:27,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:24:27,131 INFO L87 Difference]: Start difference. First operand 3738 states and 10453 transitions. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:27,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:27,876 INFO L93 Difference]: Finished difference Result 5106 states and 13392 transitions. [2021-06-05 18:24:27,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:24:27,877 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-05 18:24:27,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:27,881 INFO L225 Difference]: With dead ends: 5106 [2021-06-05 18:24:27,881 INFO L226 Difference]: Without dead ends: 4836 [2021-06-05 18:24:27,881 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 747.4ms TimeCoverageRelationStatistics Valid=1035, Invalid=3255, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 18:24:27,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4836 states. [2021-06-05 18:24:27,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4836 to 3813. [2021-06-05 18:24:27,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3813 states, 3812 states have (on average 2.8011542497376705) internal successors, (10678), 3812 states have internal predecessors, (10678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:27,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 10678 transitions. [2021-06-05 18:24:27,919 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 10678 transitions. Word has length 135 [2021-06-05 18:24:27,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:27,919 INFO L482 AbstractCegarLoop]: Abstraction has 3813 states and 10678 transitions. [2021-06-05 18:24:27,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:27,919 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 10678 transitions. [2021-06-05 18:24:27,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:24:27,922 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:27,922 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:28,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:28,122 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:28,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:28,122 INFO L82 PathProgramCache]: Analyzing trace with hash -64305204, now seen corresponding path program 218 times [2021-06-05 18:24:28,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:28,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635657843] [2021-06-05 18:24:28,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:28,309 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:28,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:28,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635657843] [2021-06-05 18:24:28,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635657843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:28,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180960534] [2021-06-05 18:24:28,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:28,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:24:28,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:28,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:24:28,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:28,533 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:28,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180960534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:28,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:28,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-05 18:24:28,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689787222] [2021-06-05 18:24:28,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 18:24:28,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:28,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 18:24:28,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:24:28,534 INFO L87 Difference]: Start difference. First operand 3813 states and 10678 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:29,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:29,170 INFO L93 Difference]: Finished difference Result 5131 states and 13517 transitions. [2021-06-05 18:24:29,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:24:29,170 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-05 18:24:29,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:29,175 INFO L225 Difference]: With dead ends: 5131 [2021-06-05 18:24:29,175 INFO L226 Difference]: Without dead ends: 4861 [2021-06-05 18:24:29,176 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 634.3ms TimeCoverageRelationStatistics Valid=1101, Invalid=3189, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 18:24:29,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4861 states. [2021-06-05 18:24:29,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4861 to 3888. [2021-06-05 18:24:29,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3888 states, 3887 states have (on average 2.804990995626447) internal successors, (10903), 3887 states have internal predecessors, (10903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:29,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3888 states to 3888 states and 10903 transitions. [2021-06-05 18:24:29,217 INFO L78 Accepts]: Start accepts. Automaton has 3888 states and 10903 transitions. Word has length 135 [2021-06-05 18:24:29,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:29,217 INFO L482 AbstractCegarLoop]: Abstraction has 3888 states and 10903 transitions. [2021-06-05 18:24:29,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:29,217 INFO L276 IsEmpty]: Start isEmpty. Operand 3888 states and 10903 transitions. [2021-06-05 18:24:29,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:24:29,220 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:29,220 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:29,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-06-05 18:24:29,421 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:29,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:29,421 INFO L82 PathProgramCache]: Analyzing trace with hash -750488388, now seen corresponding path program 219 times [2021-06-05 18:24:29,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:29,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950024784] [2021-06-05 18:24:29,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:29,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:29,613 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:29,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:29,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950024784] [2021-06-05 18:24:29,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950024784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:29,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255103020] [2021-06-05 18:24:29,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:29,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 18:24:29,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:29,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:24:29,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:29,847 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:29,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255103020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:29,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:29,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-05 18:24:29,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849052227] [2021-06-05 18:24:29,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:24:29,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:29,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:24:29,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:24:29,848 INFO L87 Difference]: Start difference. First operand 3888 states and 10903 transitions. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:30,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:30,623 INFO L93 Difference]: Finished difference Result 5156 states and 13642 transitions. [2021-06-05 18:24:30,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:24:30,623 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-05 18:24:30,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:30,627 INFO L225 Difference]: With dead ends: 5156 [2021-06-05 18:24:30,627 INFO L226 Difference]: Without dead ends: 4886 [2021-06-05 18:24:30,627 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1110 ImplicationChecksByTransitivity, 772.6ms TimeCoverageRelationStatistics Valid=1068, Invalid=3488, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 18:24:30,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4886 states. [2021-06-05 18:24:30,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4886 to 3963. [2021-06-05 18:24:30,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3963 states, 3962 states have (on average 2.8086824835941444) internal successors, (11128), 3962 states have internal predecessors, (11128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:30,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3963 states to 3963 states and 11128 transitions. [2021-06-05 18:24:30,666 INFO L78 Accepts]: Start accepts. Automaton has 3963 states and 11128 transitions. Word has length 135 [2021-06-05 18:24:30,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:30,666 INFO L482 AbstractCegarLoop]: Abstraction has 3963 states and 11128 transitions. [2021-06-05 18:24:30,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:30,666 INFO L276 IsEmpty]: Start isEmpty. Operand 3963 states and 11128 transitions. [2021-06-05 18:24:30,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:24:30,669 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:30,669 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:30,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:30,869 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:30,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:30,870 INFO L82 PathProgramCache]: Analyzing trace with hash -835523126, now seen corresponding path program 220 times [2021-06-05 18:24:30,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:30,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541294715] [2021-06-05 18:24:30,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:31,053 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:31,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:31,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541294715] [2021-06-05 18:24:31,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541294715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:31,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107737731] [2021-06-05 18:24:31,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:31,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:24:31,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:31,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:24:31,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:31,261 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:31,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107737731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:31,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:31,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-05 18:24:31,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363831376] [2021-06-05 18:24:31,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 18:24:31,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:31,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 18:24:31,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:24:31,262 INFO L87 Difference]: Start difference. First operand 3963 states and 11128 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:31,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:31,923 INFO L93 Difference]: Finished difference Result 5181 states and 13767 transitions. [2021-06-05 18:24:31,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:24:31,923 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-05 18:24:31,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:31,927 INFO L225 Difference]: With dead ends: 5181 [2021-06-05 18:24:31,928 INFO L226 Difference]: Without dead ends: 4911 [2021-06-05 18:24:31,928 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 654.6ms TimeCoverageRelationStatistics Valid=1214, Invalid=3342, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 18:24:31,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4911 states. [2021-06-05 18:24:31,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4911 to 4038. [2021-06-05 18:24:31,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4038 states, 4037 states have (on average 2.812236809512014) internal successors, (11353), 4037 states have internal predecessors, (11353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:31,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4038 states to 4038 states and 11353 transitions. [2021-06-05 18:24:31,969 INFO L78 Accepts]: Start accepts. Automaton has 4038 states and 11353 transitions. Word has length 135 [2021-06-05 18:24:31,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:31,969 INFO L482 AbstractCegarLoop]: Abstraction has 4038 states and 11353 transitions. [2021-06-05 18:24:31,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:31,969 INFO L276 IsEmpty]: Start isEmpty. Operand 4038 states and 11353 transitions. [2021-06-05 18:24:31,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:24:31,972 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:31,972 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:32,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-05 18:24:32,172 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:32,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:32,173 INFO L82 PathProgramCache]: Analyzing trace with hash -903674182, now seen corresponding path program 221 times [2021-06-05 18:24:32,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:32,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102470114] [2021-06-05 18:24:32,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:32,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:32,366 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:32,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:32,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102470114] [2021-06-05 18:24:32,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102470114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:32,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716187438] [2021-06-05 18:24:32,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:32,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 18:24:32,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:32,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:24:32,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:32,594 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:32,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716187438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:32,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:32,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-05 18:24:32,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909149036] [2021-06-05 18:24:32,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:24:32,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:32,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:24:32,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:24:32,595 INFO L87 Difference]: Start difference. First operand 4038 states and 11353 transitions. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:33,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:33,435 INFO L93 Difference]: Finished difference Result 5206 states and 13892 transitions. [2021-06-05 18:24:33,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 18:24:33,435 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-05 18:24:33,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:33,439 INFO L225 Difference]: With dead ends: 5206 [2021-06-05 18:24:33,439 INFO L226 Difference]: Without dead ends: 4936 [2021-06-05 18:24:33,440 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 834.1ms TimeCoverageRelationStatistics Valid=1249, Invalid=3581, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 18:24:33,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4936 states. [2021-06-05 18:24:33,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4936 to 4113. [2021-06-05 18:24:33,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4113 states, 4112 states have (on average 2.815661478599222) internal successors, (11578), 4112 states have internal predecessors, (11578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:33,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4113 states to 4113 states and 11578 transitions. [2021-06-05 18:24:33,481 INFO L78 Accepts]: Start accepts. Automaton has 4113 states and 11578 transitions. Word has length 135 [2021-06-05 18:24:33,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:33,482 INFO L482 AbstractCegarLoop]: Abstraction has 4113 states and 11578 transitions. [2021-06-05 18:24:33,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:33,482 INFO L276 IsEmpty]: Start isEmpty. Operand 4113 states and 11578 transitions. [2021-06-05 18:24:33,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:24:33,485 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:33,485 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:33,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:33,685 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:33,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:33,685 INFO L82 PathProgramCache]: Analyzing trace with hash 2094324040, now seen corresponding path program 222 times [2021-06-05 18:24:33,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:33,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752095467] [2021-06-05 18:24:33,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:33,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:33,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752095467] [2021-06-05 18:24:33,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752095467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:33,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081231973] [2021-06-05 18:24:33,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:33,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 18:24:33,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:33,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:24:33,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:34,084 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:34,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081231973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:34,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:34,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-05 18:24:34,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584389377] [2021-06-05 18:24:34,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 18:24:34,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:34,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 18:24:34,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:24:34,085 INFO L87 Difference]: Start difference. First operand 4113 states and 11578 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:34,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:34,775 INFO L93 Difference]: Finished difference Result 5231 states and 14017 transitions. [2021-06-05 18:24:34,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 18:24:34,775 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-05 18:24:34,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:34,780 INFO L225 Difference]: With dead ends: 5231 [2021-06-05 18:24:34,780 INFO L226 Difference]: Without dead ends: 4961 [2021-06-05 18:24:34,781 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1335 ImplicationChecksByTransitivity, 680.8ms TimeCoverageRelationStatistics Valid=1343, Invalid=3487, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 18:24:34,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4961 states. [2021-06-05 18:24:34,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4961 to 4188. [2021-06-05 18:24:34,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4188 states, 4187 states have (on average 2.818963458323382) internal successors, (11803), 4187 states have internal predecessors, (11803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:34,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4188 states to 4188 states and 11803 transitions. [2021-06-05 18:24:34,825 INFO L78 Accepts]: Start accepts. Automaton has 4188 states and 11803 transitions. Word has length 135 [2021-06-05 18:24:34,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:34,825 INFO L482 AbstractCegarLoop]: Abstraction has 4188 states and 11803 transitions. [2021-06-05 18:24:34,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:34,825 INFO L276 IsEmpty]: Start isEmpty. Operand 4188 states and 11803 transitions. [2021-06-05 18:24:34,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:24:34,828 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:34,828 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:35,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:35,029 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:35,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:35,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1770889672, now seen corresponding path program 223 times [2021-06-05 18:24:35,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:35,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154619777] [2021-06-05 18:24:35,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:35,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:35,216 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:35,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:35,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154619777] [2021-06-05 18:24:35,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154619777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:35,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501041523] [2021-06-05 18:24:35,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:35,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:24:35,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:35,435 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:35,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501041523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:35,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:35,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-05 18:24:35,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367783865] [2021-06-05 18:24:35,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:24:35,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:35,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:24:35,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:24:35,436 INFO L87 Difference]: Start difference. First operand 4188 states and 11803 transitions. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:36,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:36,316 INFO L93 Difference]: Finished difference Result 5316 states and 14307 transitions. [2021-06-05 18:24:36,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 18:24:36,317 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-05 18:24:36,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:36,321 INFO L225 Difference]: With dead ends: 5316 [2021-06-05 18:24:36,321 INFO L226 Difference]: Without dead ends: 5046 [2021-06-05 18:24:36,321 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 863.1ms TimeCoverageRelationStatistics Valid=1380, Invalid=3732, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 18:24:36,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5046 states. [2021-06-05 18:24:36,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5046 to 4263. [2021-06-05 18:24:36,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4263 states, 4262 states have (on average 2.8268418582824966) internal successors, (12048), 4262 states have internal predecessors, (12048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:36,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4263 states to 4263 states and 12048 transitions. [2021-06-05 18:24:36,363 INFO L78 Accepts]: Start accepts. Automaton has 4263 states and 12048 transitions. Word has length 135 [2021-06-05 18:24:36,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:36,363 INFO L482 AbstractCegarLoop]: Abstraction has 4263 states and 12048 transitions. [2021-06-05 18:24:36,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:36,364 INFO L276 IsEmpty]: Start isEmpty. Operand 4263 states and 12048 transitions. [2021-06-05 18:24:36,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:24:36,366 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:36,367 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:36,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:36,567 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:36,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:36,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1828623802, now seen corresponding path program 224 times [2021-06-05 18:24:36,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:36,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476131691] [2021-06-05 18:24:36,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:36,752 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:36,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:36,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476131691] [2021-06-05 18:24:36,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476131691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:36,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779460477] [2021-06-05 18:24:36,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:36,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:24:36,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:36,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:24:36,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:36,961 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:36,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779460477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:36,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:36,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-05 18:24:36,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089143011] [2021-06-05 18:24:36,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 18:24:36,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:36,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 18:24:36,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:24:36,962 INFO L87 Difference]: Start difference. First operand 4263 states and 12048 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:37,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:37,714 INFO L93 Difference]: Finished difference Result 6058 states and 16431 transitions. [2021-06-05 18:24:37,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 18:24:37,714 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-05 18:24:37,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:37,720 INFO L225 Difference]: With dead ends: 6058 [2021-06-05 18:24:37,720 INFO L226 Difference]: Without dead ends: 5788 [2021-06-05 18:24:37,720 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 720.4ms TimeCoverageRelationStatistics Valid=1489, Invalid=3623, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 18:24:37,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5788 states. [2021-06-05 18:24:37,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5788 to 4443. [2021-06-05 18:24:37,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4443 states, 4442 states have (on average 2.8381359747861326) internal successors, (12607), 4442 states have internal predecessors, (12607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:37,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4443 states to 4443 states and 12607 transitions. [2021-06-05 18:24:37,763 INFO L78 Accepts]: Start accepts. Automaton has 4443 states and 12607 transitions. Word has length 135 [2021-06-05 18:24:37,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:37,764 INFO L482 AbstractCegarLoop]: Abstraction has 4443 states and 12607 transitions. [2021-06-05 18:24:37,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:37,764 INFO L276 IsEmpty]: Start isEmpty. Operand 4443 states and 12607 transitions. [2021-06-05 18:24:37,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:24:37,767 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:37,767 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:37,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:37,967 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:37,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:37,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1806280552, now seen corresponding path program 225 times [2021-06-05 18:24:37,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:37,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833345150] [2021-06-05 18:24:37,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:37,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:38,158 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:38,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:38,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833345150] [2021-06-05 18:24:38,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833345150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:38,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102276574] [2021-06-05 18:24:38,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:38,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 18:24:38,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:38,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:24:38,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:38,387 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:38,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102276574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:38,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:38,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-05 18:24:38,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073330807] [2021-06-05 18:24:38,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:24:38,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:38,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:24:38,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:24:38,388 INFO L87 Difference]: Start difference. First operand 4443 states and 12607 transitions. Second operand has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:39,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:39,343 INFO L93 Difference]: Finished difference Result 5926 states and 16096 transitions. [2021-06-05 18:24:39,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 18:24:39,343 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-05 18:24:39,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:39,348 INFO L225 Difference]: With dead ends: 5926 [2021-06-05 18:24:39,348 INFO L226 Difference]: Without dead ends: 5351 [2021-06-05 18:24:39,349 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 910.2ms TimeCoverageRelationStatistics Valid=1436, Invalid=4416, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 18:24:39,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5351 states. [2021-06-05 18:24:39,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5351 to 4478. [2021-06-05 18:24:39,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4478 states, 4477 states have (on average 2.832923832923833) internal successors, (12683), 4477 states have internal predecessors, (12683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:39,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4478 states to 4478 states and 12683 transitions. [2021-06-05 18:24:39,390 INFO L78 Accepts]: Start accepts. Automaton has 4478 states and 12683 transitions. Word has length 135 [2021-06-05 18:24:39,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:39,390 INFO L482 AbstractCegarLoop]: Abstraction has 4478 states and 12683 transitions. [2021-06-05 18:24:39,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:39,391 INFO L276 IsEmpty]: Start isEmpty. Operand 4478 states and 12683 transitions. [2021-06-05 18:24:39,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:24:39,394 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:39,394 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:39,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 18:24:39,597 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:39,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:39,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1580375444, now seen corresponding path program 226 times [2021-06-05 18:24:39,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:39,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844848066] [2021-06-05 18:24:39,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:39,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:39,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844848066] [2021-06-05 18:24:39,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844848066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:39,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059572962] [2021-06-05 18:24:39,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:39,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:24:39,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:39,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:24:39,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:40,102 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:40,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059572962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:40,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:40,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 31 [2021-06-05 18:24:40,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261655463] [2021-06-05 18:24:40,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:24:40,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:40,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:24:40,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=722, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:24:40,103 INFO L87 Difference]: Start difference. First operand 4478 states and 12683 transitions. Second operand has 31 states, 31 states have (on average 5.483870967741935) internal successors, (170), 31 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:40,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:40,606 INFO L93 Difference]: Finished difference Result 5668 states and 15383 transitions. [2021-06-05 18:24:40,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:24:40,606 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.483870967741935) internal successors, (170), 31 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-05 18:24:40,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:40,611 INFO L225 Difference]: With dead ends: 5668 [2021-06-05 18:24:40,611 INFO L226 Difference]: Without dead ends: 5334 [2021-06-05 18:24:40,612 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 612.2ms TimeCoverageRelationStatistics Valid=926, Invalid=2496, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 18:24:40,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5334 states. [2021-06-05 18:24:40,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5334 to 4563. [2021-06-05 18:24:40,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4563 states, 4562 states have (on average 2.817404647084612) internal successors, (12853), 4562 states have internal predecessors, (12853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:40,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 12853 transitions. [2021-06-05 18:24:40,654 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 12853 transitions. Word has length 140 [2021-06-05 18:24:40,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:40,654 INFO L482 AbstractCegarLoop]: Abstraction has 4563 states and 12853 transitions. [2021-06-05 18:24:40,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.483870967741935) internal successors, (170), 31 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:40,654 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 12853 transitions. [2021-06-05 18:24:40,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:24:40,658 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:40,658 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:40,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 18:24:40,858 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:40,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:40,858 INFO L82 PathProgramCache]: Analyzing trace with hash 683281208, now seen corresponding path program 227 times [2021-06-05 18:24:40,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:40,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092649693] [2021-06-05 18:24:40,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:40,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:41,104 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:41,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:41,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092649693] [2021-06-05 18:24:41,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092649693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:41,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185607399] [2021-06-05 18:24:41,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:41,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 18:24:41,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:41,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:24:41,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:41,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185607399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:41,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:41,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-05 18:24:41,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951603672] [2021-06-05 18:24:41,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:24:41,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:41,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:24:41,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:24:41,360 INFO L87 Difference]: Start difference. First operand 4563 states and 12853 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:41,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:41,757 INFO L93 Difference]: Finished difference Result 6561 states and 16977 transitions. [2021-06-05 18:24:41,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:24:41,758 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-05 18:24:41,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:41,763 INFO L225 Difference]: With dead ends: 6561 [2021-06-05 18:24:41,763 INFO L226 Difference]: Without dead ends: 6291 [2021-06-05 18:24:41,764 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 518.2ms TimeCoverageRelationStatistics Valid=767, Invalid=1989, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 18:24:41,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6291 states. [2021-06-05 18:24:41,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6291 to 4578. [2021-06-05 18:24:41,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:41,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-05 18:24:41,808 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-05 18:24:41,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:41,808 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-05 18:24:41,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:41,808 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-05 18:24:41,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:24:41,811 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:41,811 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:42,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 18:24:42,012 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:42,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:42,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1770339288, now seen corresponding path program 228 times [2021-06-05 18:24:42,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:42,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841316409] [2021-06-05 18:24:42,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:42,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:42,268 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:42,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:42,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841316409] [2021-06-05 18:24:42,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841316409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:42,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398512940] [2021-06-05 18:24:42,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:42,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 18:24:42,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:42,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:24:42,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:42,532 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:42,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398512940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:42,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:42,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-05 18:24:42,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339287579] [2021-06-05 18:24:42,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:24:42,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:42,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:24:42,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:24:42,533 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:43,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:43,028 INFO L93 Difference]: Finished difference Result 6446 states and 16747 transitions. [2021-06-05 18:24:43,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:24:43,028 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-05 18:24:43,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:43,034 INFO L225 Difference]: With dead ends: 6446 [2021-06-05 18:24:43,034 INFO L226 Difference]: Without dead ends: 6176 [2021-06-05 18:24:43,034 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 603.1ms TimeCoverageRelationStatistics Valid=840, Invalid=2352, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 18:24:43,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6176 states. [2021-06-05 18:24:43,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6176 to 4578. [2021-06-05 18:24:43,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:43,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-05 18:24:43,077 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-05 18:24:43,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:43,077 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-05 18:24:43,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:43,077 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-05 18:24:43,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:24:43,080 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:43,081 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:43,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:43,281 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:43,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:43,281 INFO L82 PathProgramCache]: Analyzing trace with hash -888780106, now seen corresponding path program 229 times [2021-06-05 18:24:43,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:43,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845459751] [2021-06-05 18:24:43,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:43,516 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:43,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:43,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845459751] [2021-06-05 18:24:43,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845459751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:43,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520515021] [2021-06-05 18:24:43,517 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:43,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:43,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:24:43,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:43,753 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:43,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520515021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:43,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:43,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-05 18:24:43,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370378409] [2021-06-05 18:24:43,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:24:43,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:43,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:24:43,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:24:43,754 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:44,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:44,212 INFO L93 Difference]: Finished difference Result 6421 states and 16697 transitions. [2021-06-05 18:24:44,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:24:44,213 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-05 18:24:44,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:44,219 INFO L225 Difference]: With dead ends: 6421 [2021-06-05 18:24:44,219 INFO L226 Difference]: Without dead ends: 6151 [2021-06-05 18:24:44,219 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 541.5ms TimeCoverageRelationStatistics Valid=769, Invalid=2201, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 18:24:44,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6151 states. [2021-06-05 18:24:44,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6151 to 4578. [2021-06-05 18:24:44,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:44,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-05 18:24:44,264 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-05 18:24:44,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:44,264 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-05 18:24:44,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:44,264 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-05 18:24:44,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:24:44,267 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:44,267 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:44,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-06-05 18:24:44,468 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:44,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:44,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1531154522, now seen corresponding path program 230 times [2021-06-05 18:24:44,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:44,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264460555] [2021-06-05 18:24:44,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:44,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:44,719 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:44,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:44,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264460555] [2021-06-05 18:24:44,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264460555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:44,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514936703] [2021-06-05 18:24:44,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:44,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:24:44,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:44,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:24:44,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:44,965 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:44,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514936703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:44,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:44,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-05 18:24:44,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899428023] [2021-06-05 18:24:44,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:24:44,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:44,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:24:44,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:24:44,966 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:45,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:45,522 INFO L93 Difference]: Finished difference Result 6371 states and 16597 transitions. [2021-06-05 18:24:45,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:24:45,522 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-05 18:24:45,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:45,528 INFO L225 Difference]: With dead ends: 6371 [2021-06-05 18:24:45,528 INFO L226 Difference]: Without dead ends: 6101 [2021-06-05 18:24:45,528 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 646.3ms TimeCoverageRelationStatistics Valid=850, Invalid=2572, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 18:24:45,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6101 states. [2021-06-05 18:24:45,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6101 to 4578. [2021-06-05 18:24:45,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:45,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-05 18:24:45,572 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-05 18:24:45,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:45,572 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-05 18:24:45,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:45,573 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-05 18:24:45,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:24:45,576 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:45,576 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:45,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:45,776 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:45,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:45,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1577701452, now seen corresponding path program 231 times [2021-06-05 18:24:45,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:45,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026253080] [2021-06-05 18:24:45,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:45,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:45,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026253080] [2021-06-05 18:24:45,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026253080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:45,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498462023] [2021-06-05 18:24:45,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:46,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 18:24:46,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:46,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 18:24:46,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:46,228 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:46,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498462023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:46,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:46,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-05 18:24:46,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916092319] [2021-06-05 18:24:46,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:24:46,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:46,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:24:46,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:24:46,229 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:46,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:46,739 INFO L93 Difference]: Finished difference Result 6321 states and 16497 transitions. [2021-06-05 18:24:46,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:24:46,740 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-05 18:24:46,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:46,744 INFO L225 Difference]: With dead ends: 6321 [2021-06-05 18:24:46,744 INFO L226 Difference]: Without dead ends: 6051 [2021-06-05 18:24:46,745 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 551.7ms TimeCoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 18:24:46,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6051 states. [2021-06-05 18:24:46,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6051 to 4578. [2021-06-05 18:24:46,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:46,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-05 18:24:46,786 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-05 18:24:46,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:46,786 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-05 18:24:46,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:46,786 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-05 18:24:46,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:24:46,790 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:46,790 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:46,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-05 18:24:46,990 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:46,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:46,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1798881444, now seen corresponding path program 232 times [2021-06-05 18:24:46,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:46,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332557806] [2021-06-05 18:24:46,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:47,232 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:47,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:47,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332557806] [2021-06-05 18:24:47,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332557806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:47,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172403706] [2021-06-05 18:24:47,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:47,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:24:47,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:47,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:24:47,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:47,488 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:47,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172403706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:47,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:47,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-05 18:24:47,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898495578] [2021-06-05 18:24:47,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:24:47,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:47,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:24:47,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:24:47,489 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:48,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:48,086 INFO L93 Difference]: Finished difference Result 6271 states and 16397 transitions. [2021-06-05 18:24:48,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:24:48,087 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-05 18:24:48,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:48,092 INFO L225 Difference]: With dead ends: 6271 [2021-06-05 18:24:48,092 INFO L226 Difference]: Without dead ends: 6001 [2021-06-05 18:24:48,093 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 677.8ms TimeCoverageRelationStatistics Valid=876, Invalid=2784, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 18:24:48,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6001 states. [2021-06-05 18:24:48,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6001 to 4578. [2021-06-05 18:24:48,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:48,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-05 18:24:48,136 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-05 18:24:48,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:48,136 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-05 18:24:48,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:48,136 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-05 18:24:48,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:24:48,139 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:48,139 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:48,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:48,339 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:48,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:48,340 INFO L82 PathProgramCache]: Analyzing trace with hash 22190642, now seen corresponding path program 233 times [2021-06-05 18:24:48,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:48,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154290724] [2021-06-05 18:24:48,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:48,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:48,567 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:48,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:48,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154290724] [2021-06-05 18:24:48,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154290724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:48,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772012226] [2021-06-05 18:24:48,568 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:48,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 18:24:48,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:48,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:24:48,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:48,796 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:48,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772012226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:48,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:48,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-05 18:24:48,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383067625] [2021-06-05 18:24:48,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:24:48,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:48,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:24:48,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:24:48,797 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:49,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:49,337 INFO L93 Difference]: Finished difference Result 6221 states and 16297 transitions. [2021-06-05 18:24:49,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:24:49,337 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-05 18:24:49,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:49,342 INFO L225 Difference]: With dead ends: 6221 [2021-06-05 18:24:49,342 INFO L226 Difference]: Without dead ends: 5951 [2021-06-05 18:24:49,342 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 607.3ms TimeCoverageRelationStatistics Valid=821, Invalid=2601, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 18:24:49,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5951 states. [2021-06-05 18:24:49,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5951 to 4578. [2021-06-05 18:24:49,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:49,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-05 18:24:49,385 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-05 18:24:49,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:49,385 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-05 18:24:49,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:49,385 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-05 18:24:49,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:24:49,388 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:49,389 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:49,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:49,589 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:49,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:49,589 INFO L82 PathProgramCache]: Analyzing trace with hash 2121832226, now seen corresponding path program 234 times [2021-06-05 18:24:49,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:49,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875596529] [2021-06-05 18:24:49,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:49,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:49,808 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:49,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:49,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875596529] [2021-06-05 18:24:49,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875596529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:49,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468065948] [2021-06-05 18:24:49,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:49,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 18:24:49,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:49,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:24:49,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:50,066 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:50,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468065948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:50,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:50,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-05 18:24:50,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911599582] [2021-06-05 18:24:50,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:24:50,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:50,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:24:50,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:24:50,067 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:50,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:50,725 INFO L93 Difference]: Finished difference Result 6171 states and 16197 transitions. [2021-06-05 18:24:50,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:24:50,726 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-05 18:24:50,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:50,731 INFO L225 Difference]: With dead ends: 6171 [2021-06-05 18:24:50,731 INFO L226 Difference]: Without dead ends: 5901 [2021-06-05 18:24:50,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 701.2ms TimeCoverageRelationStatistics Valid=918, Invalid=2988, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 18:24:50,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5901 states. [2021-06-05 18:24:50,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5901 to 4578. [2021-06-05 18:24:50,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:50,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-05 18:24:50,775 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-05 18:24:50,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:50,775 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-05 18:24:50,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:50,775 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-05 18:24:50,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:24:50,779 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:50,779 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:50,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:50,979 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:50,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:50,979 INFO L82 PathProgramCache]: Analyzing trace with hash -662934992, now seen corresponding path program 235 times [2021-06-05 18:24:50,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:50,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692415092] [2021-06-05 18:24:50,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:50,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:51,194 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:51,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:51,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692415092] [2021-06-05 18:24:51,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692415092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:51,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145274896] [2021-06-05 18:24:51,194 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:51,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:51,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:24:51,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:51,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145274896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:51,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:51,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-05 18:24:51,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142818665] [2021-06-05 18:24:51,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:24:51,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:51,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:24:51,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:24:51,420 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:52,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:52,048 INFO L93 Difference]: Finished difference Result 6121 states and 16097 transitions. [2021-06-05 18:24:52,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:24:52,048 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-05 18:24:52,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:52,053 INFO L225 Difference]: With dead ends: 6121 [2021-06-05 18:24:52,053 INFO L226 Difference]: Without dead ends: 5851 [2021-06-05 18:24:52,053 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 615.8ms TimeCoverageRelationStatistics Valid=871, Invalid=2789, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 18:24:52,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5851 states. [2021-06-05 18:24:52,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5851 to 4578. [2021-06-05 18:24:52,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:52,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-05 18:24:52,095 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-05 18:24:52,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:52,095 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-05 18:24:52,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:52,095 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-05 18:24:52,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:24:52,098 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:52,099 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:52,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-05 18:24:52,299 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:52,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:52,299 INFO L82 PathProgramCache]: Analyzing trace with hash -23276768, now seen corresponding path program 236 times [2021-06-05 18:24:52,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:52,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851312622] [2021-06-05 18:24:52,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:52,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:52,540 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:52,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:52,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851312622] [2021-06-05 18:24:52,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851312622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:52,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120613603] [2021-06-05 18:24:52,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:52,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:24:52,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:52,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:24:52,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:52,788 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:52,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120613603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:52,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:52,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-05 18:24:52,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584452921] [2021-06-05 18:24:52,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:24:52,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:52,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:24:52,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:24:52,789 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:53,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:53,493 INFO L93 Difference]: Finished difference Result 6071 states and 15997 transitions. [2021-06-05 18:24:53,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 18:24:53,494 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-05 18:24:53,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:53,499 INFO L225 Difference]: With dead ends: 6071 [2021-06-05 18:24:53,499 INFO L226 Difference]: Without dead ends: 5801 [2021-06-05 18:24:53,499 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 762.3ms TimeCoverageRelationStatistics Valid=976, Invalid=3184, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 18:24:53,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5801 states. [2021-06-05 18:24:53,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5801 to 4578. [2021-06-05 18:24:53,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:53,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-05 18:24:53,544 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-05 18:24:53,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:53,544 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-05 18:24:53,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:53,544 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-05 18:24:53,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:24:53,547 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:53,547 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:53,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 18:24:53,748 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:53,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:53,748 INFO L82 PathProgramCache]: Analyzing trace with hash -798195794, now seen corresponding path program 237 times [2021-06-05 18:24:53,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:53,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376572740] [2021-06-05 18:24:53,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:53,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:53,936 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:53,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:53,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376572740] [2021-06-05 18:24:53,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376572740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:53,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520662371] [2021-06-05 18:24:53,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:54,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 18:24:54,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:54,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 18:24:54,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:54,177 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:54,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520662371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:54,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:54,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-05 18:24:54,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854759775] [2021-06-05 18:24:54,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:24:54,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:54,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:24:54,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:24:54,178 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:54,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:54,810 INFO L93 Difference]: Finished difference Result 6021 states and 15897 transitions. [2021-06-05 18:24:54,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:24:54,810 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-05 18:24:54,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:54,815 INFO L225 Difference]: With dead ends: 6021 [2021-06-05 18:24:54,815 INFO L226 Difference]: Without dead ends: 5751 [2021-06-05 18:24:54,816 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 622.8ms TimeCoverageRelationStatistics Valid=937, Invalid=2969, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 18:24:54,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5751 states. [2021-06-05 18:24:54,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5751 to 4578. [2021-06-05 18:24:54,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:54,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-05 18:24:54,856 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-05 18:24:54,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:54,856 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-05 18:24:54,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:54,857 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-05 18:24:54,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:24:54,860 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:54,860 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:55,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 18:24:55,060 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:55,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:55,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1252109154, now seen corresponding path program 238 times [2021-06-05 18:24:55,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:55,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996117409] [2021-06-05 18:24:55,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:55,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:55,279 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:55,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:55,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996117409] [2021-06-05 18:24:55,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996117409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:55,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916175986] [2021-06-05 18:24:55,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:55,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:24:55,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:55,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:24:55,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:55,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916175986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:55,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:55,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-05 18:24:55,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741431149] [2021-06-05 18:24:55,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:24:55,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:55,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:24:55,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:24:55,516 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:56,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:56,280 INFO L93 Difference]: Finished difference Result 5971 states and 15797 transitions. [2021-06-05 18:24:56,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:24:56,280 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-05 18:24:56,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:56,286 INFO L225 Difference]: With dead ends: 5971 [2021-06-05 18:24:56,286 INFO L226 Difference]: Without dead ends: 5701 [2021-06-05 18:24:56,286 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 786.7ms TimeCoverageRelationStatistics Valid=1050, Invalid=3372, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 18:24:56,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5701 states. [2021-06-05 18:24:56,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5701 to 4578. [2021-06-05 18:24:56,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:56,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-05 18:24:56,329 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-05 18:24:56,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:56,329 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-05 18:24:56,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:56,330 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-05 18:24:56,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:24:56,333 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:56,333 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:56,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 18:24:56,533 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:56,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:56,533 INFO L82 PathProgramCache]: Analyzing trace with hash -374097236, now seen corresponding path program 239 times [2021-06-05 18:24:56,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:56,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797004786] [2021-06-05 18:24:56,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:56,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:56,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:56,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797004786] [2021-06-05 18:24:56,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797004786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:56,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716366009] [2021-06-05 18:24:56,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:56,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 18:24:56,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:56,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:24:56,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:56,979 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:56,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716366009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:56,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:56,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-05 18:24:56,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873426985] [2021-06-05 18:24:56,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:24:56,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:56,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:24:56,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:24:56,980 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:57,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:57,645 INFO L93 Difference]: Finished difference Result 5921 states and 15697 transitions. [2021-06-05 18:24:57,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:24:57,645 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-05 18:24:57,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:57,650 INFO L225 Difference]: With dead ends: 5921 [2021-06-05 18:24:57,650 INFO L226 Difference]: Without dead ends: 5651 [2021-06-05 18:24:57,650 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 700.0ms TimeCoverageRelationStatistics Valid=1019, Invalid=3141, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 18:24:57,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5651 states. [2021-06-05 18:24:57,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5651 to 4578. [2021-06-05 18:24:57,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:57,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-05 18:24:57,692 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-05 18:24:57,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:57,692 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-05 18:24:57,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:57,692 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-05 18:24:57,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:24:57,695 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:57,695 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:57,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-06-05 18:24:57,896 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:57,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:57,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1274152036, now seen corresponding path program 240 times [2021-06-05 18:24:57,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:57,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301247884] [2021-06-05 18:24:57,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:57,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:58,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:58,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301247884] [2021-06-05 18:24:58,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301247884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:58,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10504502] [2021-06-05 18:24:58,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:58,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 18:24:58,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:58,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:24:58,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:58,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10504502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:58,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:58,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-05 18:24:58,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220153334] [2021-06-05 18:24:58,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:24:58,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:58,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:24:58,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:24:58,349 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:59,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:59,155 INFO L93 Difference]: Finished difference Result 5871 states and 15597 transitions. [2021-06-05 18:24:59,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:24:59,156 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-05 18:24:59,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:59,161 INFO L225 Difference]: With dead ends: 5871 [2021-06-05 18:24:59,161 INFO L226 Difference]: Without dead ends: 5601 [2021-06-05 18:24:59,162 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 779.4ms TimeCoverageRelationStatistics Valid=999, Invalid=3423, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 18:24:59,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5601 states. [2021-06-05 18:24:59,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5601 to 4578. [2021-06-05 18:24:59,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:59,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-05 18:24:59,204 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-05 18:24:59,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:59,205 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-05 18:24:59,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:59,205 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-05 18:24:59,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:24:59,208 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:59,208 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:59,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:59,408 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:59,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:59,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1703216342, now seen corresponding path program 241 times [2021-06-05 18:24:59,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:59,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272833543] [2021-06-05 18:24:59,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:59,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:59,610 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:59,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:59,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272833543] [2021-06-05 18:24:59,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272833543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:59,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049378546] [2021-06-05 18:24:59,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:59,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:59,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:24:59,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:59,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049378546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:59,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:59,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-05 18:24:59,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197655369] [2021-06-05 18:24:59,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:24:59,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:59,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:24:59,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:24:59,832 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:00,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:00,601 INFO L93 Difference]: Finished difference Result 5821 states and 15497 transitions. [2021-06-05 18:25:00,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:25:00,601 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-05 18:25:00,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:00,607 INFO L225 Difference]: With dead ends: 5821 [2021-06-05 18:25:00,607 INFO L226 Difference]: Without dead ends: 5551 [2021-06-05 18:25:00,607 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 725.7ms TimeCoverageRelationStatistics Valid=1117, Invalid=3305, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 18:25:00,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5551 states. [2021-06-05 18:25:00,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5551 to 4578. [2021-06-05 18:25:00,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:00,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-05 18:25:00,651 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-05 18:25:00,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:00,651 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-05 18:25:00,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:00,651 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-05 18:25:00,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:25:00,654 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:00,654 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:00,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-05 18:25:00,857 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:00,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:00,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1905567770, now seen corresponding path program 242 times [2021-06-05 18:25:00,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:00,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193638880] [2021-06-05 18:25:00,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:00,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:01,061 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:01,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:01,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193638880] [2021-06-05 18:25:01,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193638880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:01,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943955855] [2021-06-05 18:25:01,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:01,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:25:01,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:01,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:25:01,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:01,298 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:01,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943955855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:01,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:01,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-05 18:25:01,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283569011] [2021-06-05 18:25:01,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:25:01,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:01,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:25:01,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:25:01,299 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:02,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:02,257 INFO L93 Difference]: Finished difference Result 5771 states and 15397 transitions. [2021-06-05 18:25:02,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 18:25:02,258 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-05 18:25:02,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:02,264 INFO L225 Difference]: With dead ends: 5771 [2021-06-05 18:25:02,264 INFO L226 Difference]: Without dead ends: 5501 [2021-06-05 18:25:02,264 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 934.7ms TimeCoverageRelationStatistics Valid=1246, Invalid=3724, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 18:25:02,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5501 states. [2021-06-05 18:25:02,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5501 to 4578. [2021-06-05 18:25:02,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:02,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-05 18:25:02,315 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-05 18:25:02,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:02,315 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-05 18:25:02,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:02,315 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-05 18:25:02,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:25:02,319 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:02,319 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:02,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:02,520 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:02,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:02,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1820533032, now seen corresponding path program 243 times [2021-06-05 18:25:02,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:02,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746095814] [2021-06-05 18:25:02,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:02,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:02,725 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:02,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:02,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746095814] [2021-06-05 18:25:02,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746095814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:02,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101877261] [2021-06-05 18:25:02,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:02,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 18:25:02,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:02,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:25:02,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:02,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101877261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:02,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:02,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-05 18:25:02,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36477233] [2021-06-05 18:25:02,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:25:02,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:02,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:25:02,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:25:02,975 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:03,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:03,777 INFO L93 Difference]: Finished difference Result 5721 states and 15297 transitions. [2021-06-05 18:25:03,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:25:03,777 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-05 18:25:03,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:03,783 INFO L225 Difference]: With dead ends: 5721 [2021-06-05 18:25:03,783 INFO L226 Difference]: Without dead ends: 5451 [2021-06-05 18:25:03,783 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 765.6ms TimeCoverageRelationStatistics Valid=1231, Invalid=3461, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 18:25:03,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5451 states. [2021-06-05 18:25:03,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5451 to 4578. [2021-06-05 18:25:03,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:03,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-05 18:25:03,828 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-05 18:25:03,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:03,828 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-05 18:25:03,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:03,828 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-05 18:25:03,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:25:03,831 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:03,831 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:04,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:04,048 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:04,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:04,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1752381976, now seen corresponding path program 244 times [2021-06-05 18:25:04,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:04,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936808739] [2021-06-05 18:25:04,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:04,306 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:04,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:04,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936808739] [2021-06-05 18:25:04,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936808739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:04,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461535906] [2021-06-05 18:25:04,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:04,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:25:04,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:04,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:25:04,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:04,560 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:04,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461535906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:04,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:04,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-05 18:25:04,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005460300] [2021-06-05 18:25:04,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:25:04,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:04,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:25:04,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:25:04,569 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:05,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:05,572 INFO L93 Difference]: Finished difference Result 5671 states and 15197 transitions. [2021-06-05 18:25:05,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 18:25:05,573 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-05 18:25:05,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:05,579 INFO L225 Difference]: With dead ends: 5671 [2021-06-05 18:25:05,579 INFO L226 Difference]: Without dead ends: 5401 [2021-06-05 18:25:05,579 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 990.9ms TimeCoverageRelationStatistics Valid=1368, Invalid=3888, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 18:25:05,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5401 states. [2021-06-05 18:25:05,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5401 to 4578. [2021-06-05 18:25:05,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:05,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-05 18:25:05,650 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-05 18:25:05,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:05,650 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-05 18:25:05,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:05,650 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-05 18:25:05,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:25:05,653 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:05,653 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:05,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:05,855 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:05,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:05,855 INFO L82 PathProgramCache]: Analyzing trace with hash 455412902, now seen corresponding path program 245 times [2021-06-05 18:25:05,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:05,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832849394] [2021-06-05 18:25:05,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:05,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:06,077 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:06,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:06,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832849394] [2021-06-05 18:25:06,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832849394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:06,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132354866] [2021-06-05 18:25:06,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:06,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 18:25:06,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:06,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:25:06,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:06,314 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:06,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132354866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:06,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:06,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-05 18:25:06,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096313228] [2021-06-05 18:25:06,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:25:06,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:06,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:25:06,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:25:06,315 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:07,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:07,103 INFO L93 Difference]: Finished difference Result 5621 states and 15097 transitions. [2021-06-05 18:25:07,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 18:25:07,103 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-05 18:25:07,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:07,109 INFO L225 Difference]: With dead ends: 5621 [2021-06-05 18:25:07,109 INFO L226 Difference]: Without dead ends: 5351 [2021-06-05 18:25:07,110 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 791.3ms TimeCoverageRelationStatistics Valid=1361, Invalid=3609, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 18:25:07,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5351 states. [2021-06-05 18:25:07,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5351 to 4578. [2021-06-05 18:25:07,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:07,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-05 18:25:07,154 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-05 18:25:07,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:07,154 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-05 18:25:07,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:07,154 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-05 18:25:07,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:25:07,158 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:07,158 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:07,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:07,369 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:07,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:07,370 INFO L82 PathProgramCache]: Analyzing trace with hash 885166486, now seen corresponding path program 246 times [2021-06-05 18:25:07,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:07,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787893139] [2021-06-05 18:25:07,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:07,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:07,625 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:07,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:07,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787893139] [2021-06-05 18:25:07,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787893139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:07,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224613045] [2021-06-05 18:25:07,625 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:07,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 18:25:07,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:07,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:25:07,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:07,873 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:07,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224613045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:07,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:07,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-05 18:25:07,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501706401] [2021-06-05 18:25:07,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:25:07,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:07,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:25:07,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:25:07,874 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:08,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:08,845 INFO L93 Difference]: Finished difference Result 5631 states and 15147 transitions. [2021-06-05 18:25:08,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 18:25:08,845 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-05 18:25:08,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:08,850 INFO L225 Difference]: With dead ends: 5631 [2021-06-05 18:25:08,850 INFO L226 Difference]: Without dead ends: 5361 [2021-06-05 18:25:08,850 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 977.4ms TimeCoverageRelationStatistics Valid=1284, Invalid=3972, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 18:25:08,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5361 states. [2021-06-05 18:25:08,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5361 to 4578. [2021-06-05 18:25:08,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.815818221542495) internal successors, (12888), 4577 states have internal predecessors, (12888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:08,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12888 transitions. [2021-06-05 18:25:08,893 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12888 transitions. Word has length 140 [2021-06-05 18:25:08,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:08,893 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12888 transitions. [2021-06-05 18:25:08,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:08,893 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12888 transitions. [2021-06-05 18:25:08,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:25:08,896 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:08,896 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:09,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-06-05 18:25:09,114 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:09,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:09,120 INFO L82 PathProgramCache]: Analyzing trace with hash 827432356, now seen corresponding path program 247 times [2021-06-05 18:25:09,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:09,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273491533] [2021-06-05 18:25:09,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:09,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:09,327 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:09,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:09,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273491533] [2021-06-05 18:25:09,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273491533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:09,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720747475] [2021-06-05 18:25:09,327 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:09,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:25:09,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:09,548 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:09,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720747475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:09,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:09,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-05 18:25:09,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982841443] [2021-06-05 18:25:09,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:25:09,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:09,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:25:09,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:25:09,549 INFO L87 Difference]: Start difference. First operand 4578 states and 12888 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:10,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:10,371 INFO L93 Difference]: Finished difference Result 6398 states and 17321 transitions. [2021-06-05 18:25:10,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 18:25:10,372 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-05 18:25:10,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:10,378 INFO L225 Difference]: With dead ends: 6398 [2021-06-05 18:25:10,378 INFO L226 Difference]: Without dead ends: 6128 [2021-06-05 18:25:10,378 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 789.4ms TimeCoverageRelationStatistics Valid=1508, Invalid=3748, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 18:25:10,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6128 states. [2021-06-05 18:25:10,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6128 to 4758. [2021-06-05 18:25:10,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4758 states, 4757 states have (on average 2.8267815850325837) internal successors, (13447), 4757 states have internal predecessors, (13447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:10,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4758 states to 4758 states and 13447 transitions. [2021-06-05 18:25:10,428 INFO L78 Accepts]: Start accepts. Automaton has 4758 states and 13447 transitions. Word has length 140 [2021-06-05 18:25:10,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:10,428 INFO L482 AbstractCegarLoop]: Abstraction has 4758 states and 13447 transitions. [2021-06-05 18:25:10,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:10,429 INFO L276 IsEmpty]: Start isEmpty. Operand 4758 states and 13447 transitions. [2021-06-05 18:25:10,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:25:10,432 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:10,432 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:10,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 18:25:10,635 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:10,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:10,635 INFO L82 PathProgramCache]: Analyzing trace with hash 849775606, now seen corresponding path program 248 times [2021-06-05 18:25:10,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:10,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986265072] [2021-06-05 18:25:10,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:10,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:10,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:10,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986265072] [2021-06-05 18:25:10,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986265072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:10,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776310821] [2021-06-05 18:25:10,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:10,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:25:10,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:10,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:25:10,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:11,078 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:11,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776310821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:11,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:11,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-05 18:25:11,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197340325] [2021-06-05 18:25:11,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:25:11,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:11,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:25:11,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:25:11,079 INFO L87 Difference]: Start difference. First operand 4758 states and 13447 transitions. Second operand has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:12,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:12,141 INFO L93 Difference]: Finished difference Result 6221 states and 16821 transitions. [2021-06-05 18:25:12,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 18:25:12,141 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-05 18:25:12,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:12,146 INFO L225 Difference]: With dead ends: 6221 [2021-06-05 18:25:12,146 INFO L226 Difference]: Without dead ends: 5646 [2021-06-05 18:25:12,147 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 1034.4ms TimeCoverageRelationStatistics Valid=1452, Invalid=4554, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 18:25:12,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5646 states. [2021-06-05 18:25:12,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5646 to 3203. [2021-06-05 18:25:12,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 3202 states have (on average 2.7382885696439727) internal successors, (8768), 3202 states have internal predecessors, (8768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:12,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8768 transitions. [2021-06-05 18:25:12,181 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8768 transitions. Word has length 140 [2021-06-05 18:25:12,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:12,181 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8768 transitions. [2021-06-05 18:25:12,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:12,181 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8768 transitions. [2021-06-05 18:25:12,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:25:12,183 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:12,183 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:12,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 18:25:12,389 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:12,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:12,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1739326839, now seen corresponding path program 249 times [2021-06-05 18:25:12,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:12,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377644865] [2021-06-05 18:25:12,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:12,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:12,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:12,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377644865] [2021-06-05 18:25:12,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377644865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:12,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526656893] [2021-06-05 18:25:12,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:12,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 18:25:12,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:12,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:25:12,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:12,914 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:12,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526656893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:12,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:12,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-05 18:25:12,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496662713] [2021-06-05 18:25:12,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:25:12,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:12,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:25:12,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:25:12,915 INFO L87 Difference]: Start difference. First operand 3203 states and 8768 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:13,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:13,401 INFO L93 Difference]: Finished difference Result 4721 states and 12007 transitions. [2021-06-05 18:25:13,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:25:13,401 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-05 18:25:13,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:13,406 INFO L225 Difference]: With dead ends: 4721 [2021-06-05 18:25:13,406 INFO L226 Difference]: Without dead ends: 4451 [2021-06-05 18:25:13,406 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 591.1ms TimeCoverageRelationStatistics Valid=844, Invalid=2348, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 18:25:13,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2021-06-05 18:25:13,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 3278. [2021-06-05 18:25:13,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3278 states, 3277 states have (on average 2.744278303326213) internal successors, (8993), 3277 states have internal predecessors, (8993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:13,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 8993 transitions. [2021-06-05 18:25:13,439 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 8993 transitions. Word has length 145 [2021-06-05 18:25:13,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:13,439 INFO L482 AbstractCegarLoop]: Abstraction has 3278 states and 8993 transitions. [2021-06-05 18:25:13,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:13,439 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 8993 transitions. [2021-06-05 18:25:13,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:25:13,441 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:13,441 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:13,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 18:25:13,641 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:13,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:13,642 INFO L82 PathProgramCache]: Analyzing trace with hash 102019961, now seen corresponding path program 250 times [2021-06-05 18:25:13,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:13,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92811801] [2021-06-05 18:25:13,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:13,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:13,970 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:13,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:13,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92811801] [2021-06-05 18:25:13,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92811801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:13,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693981595] [2021-06-05 18:25:13,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:14,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:25:14,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:14,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:25:14,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:14,280 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:14,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693981595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:14,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:14,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-05 18:25:14,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026332383] [2021-06-05 18:25:14,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:25:14,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:14,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:25:14,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=699, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:25:14,281 INFO L87 Difference]: Start difference. First operand 3278 states and 8993 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:14,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:14,850 INFO L93 Difference]: Finished difference Result 5291 states and 13222 transitions. [2021-06-05 18:25:14,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:25:14,850 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-05 18:25:14,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:14,855 INFO L225 Difference]: With dead ends: 5291 [2021-06-05 18:25:14,855 INFO L226 Difference]: Without dead ends: 5021 [2021-06-05 18:25:14,855 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 751.2ms TimeCoverageRelationStatistics Valid=905, Invalid=2635, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 18:25:14,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5021 states. [2021-06-05 18:25:14,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5021 to 3353. [2021-06-05 18:25:14,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3352 states have (on average 2.75) internal successors, (9218), 3352 states have internal predecessors, (9218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:14,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9218 transitions. [2021-06-05 18:25:14,891 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9218 transitions. Word has length 145 [2021-06-05 18:25:14,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:14,891 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9218 transitions. [2021-06-05 18:25:14,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:14,891 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9218 transitions. [2021-06-05 18:25:14,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:25:14,894 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:14,894 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:15,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:15,095 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:15,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:15,095 INFO L82 PathProgramCache]: Analyzing trace with hash 983579143, now seen corresponding path program 251 times [2021-06-05 18:25:15,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:15,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635060950] [2021-06-05 18:25:15,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:15,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:15,405 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:15,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:15,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635060950] [2021-06-05 18:25:15,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635060950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:15,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3115644] [2021-06-05 18:25:15,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:15,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 18:25:15,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:15,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:25:15,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:15,656 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:15,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3115644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:15,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:15,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-05 18:25:15,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730827474] [2021-06-05 18:25:15,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:25:15,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:15,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:25:15,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:25:15,657 INFO L87 Difference]: Start difference. First operand 3353 states and 9218 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:16,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:16,260 INFO L93 Difference]: Finished difference Result 5321 states and 13357 transitions. [2021-06-05 18:25:16,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:25:16,260 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-05 18:25:16,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:16,265 INFO L225 Difference]: With dead ends: 5321 [2021-06-05 18:25:16,265 INFO L226 Difference]: Without dead ends: 5051 [2021-06-05 18:25:16,266 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 714.2ms TimeCoverageRelationStatistics Valid=899, Invalid=2641, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 18:25:16,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2021-06-05 18:25:16,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 3428. [2021-06-05 18:25:16,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 2.7554712576597606) internal successors, (9443), 3427 states have internal predecessors, (9443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:16,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9443 transitions. [2021-06-05 18:25:16,310 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9443 transitions. Word has length 145 [2021-06-05 18:25:16,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:16,311 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9443 transitions. [2021-06-05 18:25:16,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:16,311 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9443 transitions. [2021-06-05 18:25:16,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:25:16,314 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:16,314 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:16,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-06-05 18:25:16,514 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:16,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:16,514 INFO L82 PathProgramCache]: Analyzing trace with hash 341204727, now seen corresponding path program 252 times [2021-06-05 18:25:16,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:16,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469150256] [2021-06-05 18:25:16,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:16,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:16,788 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:16,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:16,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469150256] [2021-06-05 18:25:16,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469150256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:16,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67189192] [2021-06-05 18:25:16,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:16,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 18:25:16,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:16,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:25:16,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:17,056 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:17,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67189192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:17,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:17,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-05 18:25:17,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896414850] [2021-06-05 18:25:17,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:25:17,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:17,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:25:17,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:25:17,057 INFO L87 Difference]: Start difference. First operand 3428 states and 9443 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:17,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:17,672 INFO L93 Difference]: Finished difference Result 5346 states and 13482 transitions. [2021-06-05 18:25:17,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:25:17,673 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-05 18:25:17,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:17,677 INFO L225 Difference]: With dead ends: 5346 [2021-06-05 18:25:17,677 INFO L226 Difference]: Without dead ends: 5076 [2021-06-05 18:25:17,677 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 717.4ms TimeCoverageRelationStatistics Valid=922, Invalid=2860, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 18:25:17,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5076 states. [2021-06-05 18:25:17,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5076 to 3503. [2021-06-05 18:25:17,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 3502 states have (on average 2.7607081667618503) internal successors, (9668), 3502 states have internal predecessors, (9668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:17,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9668 transitions. [2021-06-05 18:25:17,712 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9668 transitions. Word has length 145 [2021-06-05 18:25:17,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:17,712 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9668 transitions. [2021-06-05 18:25:17,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:17,713 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9668 transitions. [2021-06-05 18:25:17,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:25:17,715 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:17,715 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:17,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:17,916 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:17,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:17,916 INFO L82 PathProgramCache]: Analyzing trace with hash 294657797, now seen corresponding path program 253 times [2021-06-05 18:25:17,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:17,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081580836] [2021-06-05 18:25:17,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:18,168 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:18,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:18,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081580836] [2021-06-05 18:25:18,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081580836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:18,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594733606] [2021-06-05 18:25:18,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:18,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:18,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:25:18,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:18,439 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:18,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594733606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:18,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:18,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-05 18:25:18,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803652172] [2021-06-05 18:25:18,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:25:18,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:18,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:25:18,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:25:18,440 INFO L87 Difference]: Start difference. First operand 3503 states and 9668 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:19,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:19,005 INFO L93 Difference]: Finished difference Result 5371 states and 13607 transitions. [2021-06-05 18:25:19,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:25:19,005 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-05 18:25:19,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:19,010 INFO L225 Difference]: With dead ends: 5371 [2021-06-05 18:25:19,010 INFO L226 Difference]: Without dead ends: 5101 [2021-06-05 18:25:19,010 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 648.8ms TimeCoverageRelationStatistics Valid=930, Invalid=2852, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 18:25:19,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5101 states. [2021-06-05 18:25:19,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5101 to 3578. [2021-06-05 18:25:19,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 3577 states have (on average 2.7657254682694994) internal successors, (9893), 3577 states have internal predecessors, (9893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:19,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 9893 transitions. [2021-06-05 18:25:19,047 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 9893 transitions. Word has length 145 [2021-06-05 18:25:19,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:19,048 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 9893 transitions. [2021-06-05 18:25:19,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:19,048 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 9893 transitions. [2021-06-05 18:25:19,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:25:19,050 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:19,050 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:19,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:19,252 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:19,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:19,252 INFO L82 PathProgramCache]: Analyzing trace with hash -623726603, now seen corresponding path program 254 times [2021-06-05 18:25:19,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:19,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890735828] [2021-06-05 18:25:19,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:19,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:19,541 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:19,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:19,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890735828] [2021-06-05 18:25:19,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890735828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:19,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24276368] [2021-06-05 18:25:19,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:19,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:25:19,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:19,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:25:19,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:19,807 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:19,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24276368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:19,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:19,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-05 18:25:19,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023886067] [2021-06-05 18:25:19,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:25:19,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:19,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:25:19,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:25:19,808 INFO L87 Difference]: Start difference. First operand 3578 states and 9893 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:20,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:20,516 INFO L93 Difference]: Finished difference Result 5396 states and 13732 transitions. [2021-06-05 18:25:20,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:25:20,517 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-05 18:25:20,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:20,521 INFO L225 Difference]: With dead ends: 5396 [2021-06-05 18:25:20,521 INFO L226 Difference]: Without dead ends: 5126 [2021-06-05 18:25:20,522 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 800.8ms TimeCoverageRelationStatistics Valid=955, Invalid=3077, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 18:25:20,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5126 states. [2021-06-05 18:25:20,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5126 to 3653. [2021-06-05 18:25:20,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 2.7705366922234393) internal successors, (10118), 3652 states have internal predecessors, (10118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:20,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10118 transitions. [2021-06-05 18:25:20,562 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10118 transitions. Word has length 145 [2021-06-05 18:25:20,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:20,562 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10118 transitions. [2021-06-05 18:25:20,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:20,562 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10118 transitions. [2021-06-05 18:25:20,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:25:20,565 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:20,565 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:20,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:20,769 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:20,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:20,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1894549891, now seen corresponding path program 255 times [2021-06-05 18:25:20,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:20,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885958864] [2021-06-05 18:25:20,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:21,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:21,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885958864] [2021-06-05 18:25:21,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885958864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:21,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485247653] [2021-06-05 18:25:21,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:21,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 18:25:21,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:21,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 18:25:21,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:21,263 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:21,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485247653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:21,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:21,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-05 18:25:21,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517879167] [2021-06-05 18:25:21,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:25:21,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:21,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:25:21,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:25:21,264 INFO L87 Difference]: Start difference. First operand 3653 states and 10118 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:21,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:21,847 INFO L93 Difference]: Finished difference Result 5421 states and 13857 transitions. [2021-06-05 18:25:21,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:25:21,847 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-05 18:25:21,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:21,852 INFO L225 Difference]: With dead ends: 5421 [2021-06-05 18:25:21,852 INFO L226 Difference]: Without dead ends: 5151 [2021-06-05 18:25:21,853 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 648.0ms TimeCoverageRelationStatistics Valid=977, Invalid=3055, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 18:25:21,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5151 states. [2021-06-05 18:25:21,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5151 to 3728. [2021-06-05 18:25:21,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3728 states, 3727 states have (on average 2.775154279581433) internal successors, (10343), 3727 states have internal predecessors, (10343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:21,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 10343 transitions. [2021-06-05 18:25:21,895 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 10343 transitions. Word has length 145 [2021-06-05 18:25:21,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:21,895 INFO L482 AbstractCegarLoop]: Abstraction has 3728 states and 10343 transitions. [2021-06-05 18:25:21,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:21,895 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 10343 transitions. [2021-06-05 18:25:21,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:25:21,899 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:21,899 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:22,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:22,099 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:22,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:22,099 INFO L82 PathProgramCache]: Analyzing trace with hash -300775821, now seen corresponding path program 256 times [2021-06-05 18:25:22,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:22,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139020299] [2021-06-05 18:25:22,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:22,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:22,417 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:22,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:22,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139020299] [2021-06-05 18:25:22,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139020299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:22,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469894540] [2021-06-05 18:25:22,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:22,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:25:22,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:22,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:25:22,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:22,684 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:22,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469894540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:22,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:22,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-05 18:25:22,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828510940] [2021-06-05 18:25:22,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:25:22,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:22,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:25:22,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:25:22,685 INFO L87 Difference]: Start difference. First operand 3728 states and 10343 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:23,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:23,390 INFO L93 Difference]: Finished difference Result 5446 states and 13982 transitions. [2021-06-05 18:25:23,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 18:25:23,391 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-05 18:25:23,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:23,395 INFO L225 Difference]: With dead ends: 5446 [2021-06-05 18:25:23,395 INFO L226 Difference]: Without dead ends: 5176 [2021-06-05 18:25:23,396 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 807.7ms TimeCoverageRelationStatistics Valid=1004, Invalid=3286, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 18:25:23,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-06-05 18:25:23,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 3803. [2021-06-05 18:25:23,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3803 states, 3802 states have (on average 2.7795896896370333) internal successors, (10568), 3802 states have internal predecessors, (10568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:23,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3803 states to 3803 states and 10568 transitions. [2021-06-05 18:25:23,435 INFO L78 Accepts]: Start accepts. Automaton has 3803 states and 10568 transitions. Word has length 145 [2021-06-05 18:25:23,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:23,435 INFO L482 AbstractCegarLoop]: Abstraction has 3803 states and 10568 transitions. [2021-06-05 18:25:23,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:23,435 INFO L276 IsEmpty]: Start isEmpty. Operand 3803 states and 10568 transitions. [2021-06-05 18:25:23,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:25:23,438 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:23,438 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:23,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:23,639 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:23,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:23,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1209424257, now seen corresponding path program 257 times [2021-06-05 18:25:23,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:23,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849745806] [2021-06-05 18:25:23,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:23,858 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:23,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:23,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849745806] [2021-06-05 18:25:23,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849745806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:23,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973627350] [2021-06-05 18:25:23,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:23,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 18:25:23,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:23,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:25:23,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:24,094 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:24,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973627350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:24,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:24,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-05 18:25:24,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695760148] [2021-06-05 18:25:24,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:25:24,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:24,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:25:24,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:25:24,095 INFO L87 Difference]: Start difference. First operand 3803 states and 10568 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:24,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:24,737 INFO L93 Difference]: Finished difference Result 5471 states and 14107 transitions. [2021-06-05 18:25:24,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:25:24,738 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-05 18:25:24,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:24,743 INFO L225 Difference]: With dead ends: 5471 [2021-06-05 18:25:24,743 INFO L226 Difference]: Without dead ends: 5201 [2021-06-05 18:25:24,743 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 660.0ms TimeCoverageRelationStatistics Valid=1040, Invalid=3250, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 18:25:24,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5201 states. [2021-06-05 18:25:24,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5201 to 3878. [2021-06-05 18:25:24,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.7838534949703377) internal successors, (10793), 3877 states have internal predecessors, (10793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:24,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10793 transitions. [2021-06-05 18:25:24,788 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10793 transitions. Word has length 145 [2021-06-05 18:25:24,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:24,788 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10793 transitions. [2021-06-05 18:25:24,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:24,788 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10793 transitions. [2021-06-05 18:25:24,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:25:24,791 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:24,791 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:25,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 18:25:25,001 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:25,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:25,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1849082481, now seen corresponding path program 258 times [2021-06-05 18:25:25,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:25,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612286834] [2021-06-05 18:25:25,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:25,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:25,252 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:25,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:25,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612286834] [2021-06-05 18:25:25,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612286834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:25,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752172098] [2021-06-05 18:25:25,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:25,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 18:25:25,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:25,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:25:25,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:25,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752172098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:25,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:25,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-05 18:25:25,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139933620] [2021-06-05 18:25:25,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:25:25,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:25,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:25:25,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:25:25,521 INFO L87 Difference]: Start difference. First operand 3878 states and 10793 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:26,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:26,348 INFO L93 Difference]: Finished difference Result 5496 states and 14232 transitions. [2021-06-05 18:25:26,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:25:26,349 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-05 18:25:26,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:26,354 INFO L225 Difference]: With dead ends: 5496 [2021-06-05 18:25:26,354 INFO L226 Difference]: Without dead ends: 5226 [2021-06-05 18:25:26,354 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 856.4ms TimeCoverageRelationStatistics Valid=1069, Invalid=3487, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 18:25:26,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2021-06-05 18:25:26,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 3953. [2021-06-05 18:25:26,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3953 states, 3952 states have (on average 2.7879554655870447) internal successors, (11018), 3952 states have internal predecessors, (11018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:26,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 11018 transitions. [2021-06-05 18:25:26,397 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 11018 transitions. Word has length 145 [2021-06-05 18:25:26,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:26,397 INFO L482 AbstractCegarLoop]: Abstraction has 3953 states and 11018 transitions. [2021-06-05 18:25:26,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:26,398 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 11018 transitions. [2021-06-05 18:25:26,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:25:26,400 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:26,401 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:26,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:26,601 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:26,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:26,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1074163455, now seen corresponding path program 259 times [2021-06-05 18:25:26,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:26,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155576414] [2021-06-05 18:25:26,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:26,840 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:26,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:26,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155576414] [2021-06-05 18:25:26,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155576414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:26,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166302161] [2021-06-05 18:25:26,840 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:26,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:26,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:25:26,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:27,077 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:27,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166302161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:27,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:27,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-05 18:25:27,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371430170] [2021-06-05 18:25:27,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:25:27,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:27,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:25:27,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:25:27,078 INFO L87 Difference]: Start difference. First operand 3953 states and 11018 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:27,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:27,758 INFO L93 Difference]: Finished difference Result 5521 states and 14357 transitions. [2021-06-05 18:25:27,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:25:27,758 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-05 18:25:27,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:27,763 INFO L225 Difference]: With dead ends: 5521 [2021-06-05 18:25:27,763 INFO L226 Difference]: Without dead ends: 5251 [2021-06-05 18:25:27,764 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 722.5ms TimeCoverageRelationStatistics Valid=1119, Invalid=3437, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 18:25:27,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5251 states. [2021-06-05 18:25:27,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5251 to 4028. [2021-06-05 18:25:27,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4028 states, 4027 states have (on average 2.7919046436553265) internal successors, (11243), 4027 states have internal predecessors, (11243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:27,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4028 states to 4028 states and 11243 transitions. [2021-06-05 18:25:27,812 INFO L78 Accepts]: Start accepts. Automaton has 4028 states and 11243 transitions. Word has length 145 [2021-06-05 18:25:27,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:27,812 INFO L482 AbstractCegarLoop]: Abstraction has 4028 states and 11243 transitions. [2021-06-05 18:25:27,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:27,812 INFO L276 IsEmpty]: Start isEmpty. Operand 4028 states and 11243 transitions. [2021-06-05 18:25:27,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:25:27,815 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:27,815 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:28,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-05 18:25:28,016 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:28,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:28,016 INFO L82 PathProgramCache]: Analyzing trace with hash 620250095, now seen corresponding path program 260 times [2021-06-05 18:25:28,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:28,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726222371] [2021-06-05 18:25:28,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:28,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:28,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:28,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726222371] [2021-06-05 18:25:28,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726222371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:28,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380889180] [2021-06-05 18:25:28,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:28,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:25:28,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:28,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:25:28,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:28,517 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:28,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380889180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:28,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:28,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-05 18:25:28,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108599352] [2021-06-05 18:25:28,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:25:28,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:28,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:25:28,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:25:28,518 INFO L87 Difference]: Start difference. First operand 4028 states and 11243 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:29,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:29,335 INFO L93 Difference]: Finished difference Result 5546 states and 14482 transitions. [2021-06-05 18:25:29,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:25:29,335 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-05 18:25:29,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:29,340 INFO L225 Difference]: With dead ends: 5546 [2021-06-05 18:25:29,340 INFO L226 Difference]: Without dead ends: 5276 [2021-06-05 18:25:29,341 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 841.1ms TimeCoverageRelationStatistics Valid=1150, Invalid=3680, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 18:25:29,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5276 states. [2021-06-05 18:25:29,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5276 to 4103. [2021-06-05 18:25:29,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4103 states, 4102 states have (on average 2.795709410043881) internal successors, (11468), 4102 states have internal predecessors, (11468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:29,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4103 states to 4103 states and 11468 transitions. [2021-06-05 18:25:29,385 INFO L78 Accepts]: Start accepts. Automaton has 4103 states and 11468 transitions. Word has length 145 [2021-06-05 18:25:29,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:29,385 INFO L482 AbstractCegarLoop]: Abstraction has 4103 states and 11468 transitions. [2021-06-05 18:25:29,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:29,385 INFO L276 IsEmpty]: Start isEmpty. Operand 4103 states and 11468 transitions. [2021-06-05 18:25:29,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:25:29,388 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:29,388 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:29,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-05 18:25:29,588 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:29,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:29,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1498262013, now seen corresponding path program 261 times [2021-06-05 18:25:29,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:29,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434225560] [2021-06-05 18:25:29,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:29,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:29,809 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:29,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:29,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434225560] [2021-06-05 18:25:29,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434225560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:29,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892990781] [2021-06-05 18:25:29,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:29,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 18:25:29,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:29,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:25:29,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:30,042 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:30,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892990781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:30,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:30,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-05 18:25:30,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443998110] [2021-06-05 18:25:30,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:25:30,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:30,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:25:30,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:25:30,042 INFO L87 Difference]: Start difference. First operand 4103 states and 11468 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:30,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:30,751 INFO L93 Difference]: Finished difference Result 5571 states and 14607 transitions. [2021-06-05 18:25:30,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:25:30,751 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-05 18:25:30,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:30,756 INFO L225 Difference]: With dead ends: 5571 [2021-06-05 18:25:30,756 INFO L226 Difference]: Without dead ends: 5301 [2021-06-05 18:25:30,757 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 715.1ms TimeCoverageRelationStatistics Valid=1214, Invalid=3616, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 18:25:30,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5301 states. [2021-06-05 18:25:30,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5301 to 4178. [2021-06-05 18:25:30,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4178 states, 4177 states have (on average 2.799377543691645) internal successors, (11693), 4177 states have internal predecessors, (11693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:30,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4178 states to 4178 states and 11693 transitions. [2021-06-05 18:25:30,800 INFO L78 Accepts]: Start accepts. Automaton has 4178 states and 11693 transitions. Word has length 145 [2021-06-05 18:25:30,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:30,800 INFO L482 AbstractCegarLoop]: Abstraction has 4178 states and 11693 transitions. [2021-06-05 18:25:30,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:30,800 INFO L276 IsEmpty]: Start isEmpty. Operand 4178 states and 11693 transitions. [2021-06-05 18:25:30,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:25:30,803 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:30,803 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:31,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:31,004 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:31,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:31,004 INFO L82 PathProgramCache]: Analyzing trace with hash 598207213, now seen corresponding path program 262 times [2021-06-05 18:25:31,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:31,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036196376] [2021-06-05 18:25:31,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:31,282 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:31,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:31,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036196376] [2021-06-05 18:25:31,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036196376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:31,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062339878] [2021-06-05 18:25:31,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:31,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:25:31,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:31,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:25:31,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:31,526 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:31,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062339878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:31,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:31,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-05 18:25:31,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401007874] [2021-06-05 18:25:31,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:25:31,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:31,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:25:31,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:25:31,526 INFO L87 Difference]: Start difference. First operand 4178 states and 11693 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:32,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:32,372 INFO L93 Difference]: Finished difference Result 5596 states and 14732 transitions. [2021-06-05 18:25:32,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 18:25:32,373 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-05 18:25:32,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:32,378 INFO L225 Difference]: With dead ends: 5596 [2021-06-05 18:25:32,378 INFO L226 Difference]: Without dead ends: 5326 [2021-06-05 18:25:32,378 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 915.1ms TimeCoverageRelationStatistics Valid=1247, Invalid=3865, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 18:25:32,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2021-06-05 18:25:32,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 4253. [2021-06-05 18:25:32,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4253 states, 4252 states have (on average 2.8029162746942617) internal successors, (11918), 4252 states have internal predecessors, (11918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:32,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4253 states to 4253 states and 11918 transitions. [2021-06-05 18:25:32,421 INFO L78 Accepts]: Start accepts. Automaton has 4253 states and 11918 transitions. Word has length 145 [2021-06-05 18:25:32,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:32,421 INFO L482 AbstractCegarLoop]: Abstraction has 4253 states and 11918 transitions. [2021-06-05 18:25:32,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:32,421 INFO L276 IsEmpty]: Start isEmpty. Operand 4253 states and 11918 transitions. [2021-06-05 18:25:32,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:25:32,424 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:32,424 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:32,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-06-05 18:25:32,624 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:32,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:32,624 INFO L82 PathProgramCache]: Analyzing trace with hash 169142907, now seen corresponding path program 263 times [2021-06-05 18:25:32,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:32,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341038475] [2021-06-05 18:25:32,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:32,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:32,841 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:32,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:32,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341038475] [2021-06-05 18:25:32,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341038475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:32,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473428151] [2021-06-05 18:25:32,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:32,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 18:25:32,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:32,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:25:32,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:33,069 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:33,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473428151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:33,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:33,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-05 18:25:33,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213082669] [2021-06-05 18:25:33,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:25:33,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:33,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:25:33,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:25:33,070 INFO L87 Difference]: Start difference. First operand 4253 states and 11918 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:33,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:33,847 INFO L93 Difference]: Finished difference Result 5621 states and 14857 transitions. [2021-06-05 18:25:33,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 18:25:33,848 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-05 18:25:33,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:33,853 INFO L225 Difference]: With dead ends: 5621 [2021-06-05 18:25:33,853 INFO L226 Difference]: Without dead ends: 5351 [2021-06-05 18:25:33,854 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 761.2ms TimeCoverageRelationStatistics Valid=1325, Invalid=3787, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 18:25:33,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5351 states. [2021-06-05 18:25:33,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5351 to 4328. [2021-06-05 18:25:33,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4328 states, 4327 states have (on average 2.8063323318696556) internal successors, (12143), 4327 states have internal predecessors, (12143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:33,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4328 states to 4328 states and 12143 transitions. [2021-06-05 18:25:33,915 INFO L78 Accepts]: Start accepts. Automaton has 4328 states and 12143 transitions. Word has length 145 [2021-06-05 18:25:33,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:33,915 INFO L482 AbstractCegarLoop]: Abstraction has 4328 states and 12143 transitions. [2021-06-05 18:25:33,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:33,915 INFO L276 IsEmpty]: Start isEmpty. Operand 4328 states and 12143 transitions. [2021-06-05 18:25:33,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:25:33,918 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:33,918 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:34,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:34,118 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:34,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:34,119 INFO L82 PathProgramCache]: Analyzing trace with hash -517040277, now seen corresponding path program 264 times [2021-06-05 18:25:34,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:34,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668358719] [2021-06-05 18:25:34,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:34,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:34,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:34,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668358719] [2021-06-05 18:25:34,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668358719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:34,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142132111] [2021-06-05 18:25:34,345 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:34,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 18:25:34,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:34,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:25:34,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:34,602 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:34,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142132111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:34,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:34,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-05 18:25:34,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795828090] [2021-06-05 18:25:34,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:25:34,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:34,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:25:34,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:25:34,603 INFO L87 Difference]: Start difference. First operand 4328 states and 12143 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:35,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:35,534 INFO L93 Difference]: Finished difference Result 5646 states and 14982 transitions. [2021-06-05 18:25:35,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 18:25:35,534 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-05 18:25:35,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:35,540 INFO L225 Difference]: With dead ends: 5646 [2021-06-05 18:25:35,540 INFO L226 Difference]: Without dead ends: 5376 [2021-06-05 18:25:35,540 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1343 ImplicationChecksByTransitivity, 916.2ms TimeCoverageRelationStatistics Valid=1273, Invalid=4129, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 18:25:35,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5376 states. [2021-06-05 18:25:35,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5376 to 4403. [2021-06-05 18:25:35,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4403 states, 4402 states have (on average 2.809631985461154) internal successors, (12368), 4402 states have internal predecessors, (12368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:35,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4403 states to 4403 states and 12368 transitions. [2021-06-05 18:25:35,588 INFO L78 Accepts]: Start accepts. Automaton has 4403 states and 12368 transitions. Word has length 145 [2021-06-05 18:25:35,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:35,588 INFO L482 AbstractCegarLoop]: Abstraction has 4403 states and 12368 transitions. [2021-06-05 18:25:35,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:35,589 INFO L276 IsEmpty]: Start isEmpty. Operand 4403 states and 12368 transitions. [2021-06-05 18:25:35,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:25:35,592 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:35,592 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:35,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:35,801 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:35,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:35,801 INFO L82 PathProgramCache]: Analyzing trace with hash -602075015, now seen corresponding path program 265 times [2021-06-05 18:25:35,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:35,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532045776] [2021-06-05 18:25:35,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:35,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:36,028 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:36,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:36,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532045776] [2021-06-05 18:25:36,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532045776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:36,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253100039] [2021-06-05 18:25:36,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:36,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:36,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:25:36,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:36,271 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:36,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253100039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:36,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:36,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-05 18:25:36,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947948301] [2021-06-05 18:25:36,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:25:36,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:36,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:25:36,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:25:36,272 INFO L87 Difference]: Start difference. First operand 4403 states and 12368 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:37,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:37,149 INFO L93 Difference]: Finished difference Result 5671 states and 15107 transitions. [2021-06-05 18:25:37,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 18:25:37,149 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-05 18:25:37,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:37,154 INFO L225 Difference]: With dead ends: 5671 [2021-06-05 18:25:37,154 INFO L226 Difference]: Without dead ends: 5401 [2021-06-05 18:25:37,155 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 844.7ms TimeCoverageRelationStatistics Valid=1452, Invalid=3950, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 18:25:37,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5401 states. [2021-06-05 18:25:37,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5401 to 4478. [2021-06-05 18:25:37,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4478 states, 4477 states have (on average 2.812821085548358) internal successors, (12593), 4477 states have internal predecessors, (12593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:37,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4478 states to 4478 states and 12593 transitions. [2021-06-05 18:25:37,200 INFO L78 Accepts]: Start accepts. Automaton has 4478 states and 12593 transitions. Word has length 145 [2021-06-05 18:25:37,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:37,200 INFO L482 AbstractCegarLoop]: Abstraction has 4478 states and 12593 transitions. [2021-06-05 18:25:37,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:37,200 INFO L276 IsEmpty]: Start isEmpty. Operand 4478 states and 12593 transitions. [2021-06-05 18:25:37,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:25:37,203 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:37,203 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:37,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:37,404 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:37,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:37,404 INFO L82 PathProgramCache]: Analyzing trace with hash -670226071, now seen corresponding path program 266 times [2021-06-05 18:25:37,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:37,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743100962] [2021-06-05 18:25:37,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:37,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:37,990 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:37,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:37,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743100962] [2021-06-05 18:25:37,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743100962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:37,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628745819] [2021-06-05 18:25:37,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:38,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:25:38,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:38,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:25:38,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:38,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628745819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:38,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:38,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-05 18:25:38,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349975725] [2021-06-05 18:25:38,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:25:38,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:38,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:25:38,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:25:38,247 INFO L87 Difference]: Start difference. First operand 4478 states and 12593 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:39,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:39,267 INFO L93 Difference]: Finished difference Result 5696 states and 15232 transitions. [2021-06-05 18:25:39,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 18:25:39,267 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-05 18:25:39,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:39,273 INFO L225 Difference]: With dead ends: 5696 [2021-06-05 18:25:39,273 INFO L226 Difference]: Without dead ends: 5426 [2021-06-05 18:25:39,273 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1511 ImplicationChecksByTransitivity, 1311.5ms TimeCoverageRelationStatistics Valid=1489, Invalid=4211, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 18:25:39,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-06-05 18:25:39,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 4553. [2021-06-05 18:25:39,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4553 states, 4552 states have (on average 2.8159050966608086) internal successors, (12818), 4552 states have internal predecessors, (12818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:39,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4553 states to 4553 states and 12818 transitions. [2021-06-05 18:25:39,324 INFO L78 Accepts]: Start accepts. Automaton has 4553 states and 12818 transitions. Word has length 145 [2021-06-05 18:25:39,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:39,324 INFO L482 AbstractCegarLoop]: Abstraction has 4553 states and 12818 transitions. [2021-06-05 18:25:39,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:39,324 INFO L276 IsEmpty]: Start isEmpty. Operand 4553 states and 12818 transitions. [2021-06-05 18:25:39,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:25:39,327 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:39,327 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:39,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:39,528 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:39,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:39,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1967195145, now seen corresponding path program 267 times [2021-06-05 18:25:39,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:39,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749079222] [2021-06-05 18:25:39,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:39,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:39,816 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:39,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:39,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749079222] [2021-06-05 18:25:39,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749079222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:39,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811724782] [2021-06-05 18:25:39,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:39,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 18:25:39,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:39,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:25:39,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:40,083 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:40,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811724782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:40,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:40,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-05 18:25:40,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952212253] [2021-06-05 18:25:40,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:25:40,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:40,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:25:40,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:25:40,084 INFO L87 Difference]: Start difference. First operand 4553 states and 12818 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:40,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:40,946 INFO L93 Difference]: Finished difference Result 5766 states and 15477 transitions. [2021-06-05 18:25:40,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 18:25:40,946 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-05 18:25:40,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:40,951 INFO L225 Difference]: With dead ends: 5766 [2021-06-05 18:25:40,951 INFO L226 Difference]: Without dead ends: 5496 [2021-06-05 18:25:40,951 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 908.5ms TimeCoverageRelationStatistics Valid=1595, Invalid=4105, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 18:25:40,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5496 states. [2021-06-05 18:25:40,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5496 to 4628. [2021-06-05 18:25:40,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4628 states, 4627 states have (on average 2.822130970391182) internal successors, (13058), 4627 states have internal predecessors, (13058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:40,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4628 states to 4628 states and 13058 transitions. [2021-06-05 18:25:40,996 INFO L78 Accepts]: Start accepts. Automaton has 4628 states and 13058 transitions. Word has length 145 [2021-06-05 18:25:40,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:40,996 INFO L482 AbstractCegarLoop]: Abstraction has 4628 states and 13058 transitions. [2021-06-05 18:25:40,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:40,997 INFO L276 IsEmpty]: Start isEmpty. Operand 4628 states and 13058 transitions. [2021-06-05 18:25:41,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:25:41,000 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:41,000 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:41,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:41,200 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:41,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:41,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1537441561, now seen corresponding path program 268 times [2021-06-05 18:25:41,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:41,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870936358] [2021-06-05 18:25:41,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:41,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:41,425 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:41,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:41,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870936358] [2021-06-05 18:25:41,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870936358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:41,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42808395] [2021-06-05 18:25:41,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:41,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:25:41,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:41,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:25:41,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:41,661 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:41,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42808395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:41,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:41,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-05 18:25:41,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618317175] [2021-06-05 18:25:41,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:25:41,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:41,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:25:41,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:25:41,662 INFO L87 Difference]: Start difference. First operand 4628 states and 13058 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:42,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:42,712 INFO L93 Difference]: Finished difference Result 6344 states and 17103 transitions. [2021-06-05 18:25:42,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 18:25:42,712 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-05 18:25:42,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:42,717 INFO L225 Difference]: With dead ends: 6344 [2021-06-05 18:25:42,717 INFO L226 Difference]: Without dead ends: 5721 [2021-06-05 18:25:42,718 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 1021.5ms TimeCoverageRelationStatistics Valid=1657, Invalid=4663, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 18:25:42,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5721 states. [2021-06-05 18:25:42,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5721 to 4703. [2021-06-05 18:25:42,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4703 states, 4702 states have (on average 2.8260314759676732) internal successors, (13288), 4702 states have internal predecessors, (13288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:42,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4703 states to 4703 states and 13288 transitions. [2021-06-05 18:25:42,777 INFO L78 Accepts]: Start accepts. Automaton has 4703 states and 13288 transitions. Word has length 145 [2021-06-05 18:25:42,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:42,777 INFO L482 AbstractCegarLoop]: Abstraction has 4703 states and 13288 transitions. [2021-06-05 18:25:42,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:42,777 INFO L276 IsEmpty]: Start isEmpty. Operand 4703 states and 13288 transitions. [2021-06-05 18:25:42,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:25:42,780 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:42,780 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:42,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:42,981 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:42,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:42,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1595175691, now seen corresponding path program 269 times [2021-06-05 18:25:42,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:42,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529857293] [2021-06-05 18:25:42,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:42,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:43,192 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:43,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:43,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529857293] [2021-06-05 18:25:43,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529857293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:43,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910016906] [2021-06-05 18:25:43,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:43,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 18:25:43,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:43,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:25:43,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:43,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910016906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:43,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:43,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-05 18:25:43,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737450448] [2021-06-05 18:25:43,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:25:43,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:43,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:25:43,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:25:43,415 INFO L87 Difference]: Start difference. First operand 4703 states and 13288 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:44,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:44,277 INFO L93 Difference]: Finished difference Result 6548 states and 17771 transitions. [2021-06-05 18:25:44,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 18:25:44,278 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-05 18:25:44,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:44,283 INFO L225 Difference]: With dead ends: 6548 [2021-06-05 18:25:44,284 INFO L226 Difference]: Without dead ends: 6278 [2021-06-05 18:25:44,284 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 825.2ms TimeCoverageRelationStatistics Valid=1755, Invalid=4251, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 18:25:44,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6278 states. [2021-06-05 18:25:44,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6278 to 4883. [2021-06-05 18:25:44,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4883 states, 4882 states have (on average 2.8363375665710775) internal successors, (13847), 4882 states have internal predecessors, (13847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:44,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4883 states to 4883 states and 13847 transitions. [2021-06-05 18:25:44,333 INFO L78 Accepts]: Start accepts. Automaton has 4883 states and 13847 transitions. Word has length 145 [2021-06-05 18:25:44,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:44,334 INFO L482 AbstractCegarLoop]: Abstraction has 4883 states and 13847 transitions. [2021-06-05 18:25:44,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:44,334 INFO L276 IsEmpty]: Start isEmpty. Operand 4883 states and 13847 transitions. [2021-06-05 18:25:44,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:25:44,337 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:44,337 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:44,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 18:25:44,537 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:44,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:44,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1572832441, now seen corresponding path program 270 times [2021-06-05 18:25:44,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:44,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738254693] [2021-06-05 18:25:44,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:44,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:44,750 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:44,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:44,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738254693] [2021-06-05 18:25:44,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738254693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:44,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859510559] [2021-06-05 18:25:44,750 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:44,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 18:25:44,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:44,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:25:44,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:44,981 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:44,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859510559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:44,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:44,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-05 18:25:44,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070081725] [2021-06-05 18:25:44,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:25:44,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:44,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:25:44,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:25:44,982 INFO L87 Difference]: Start difference. First operand 4883 states and 13847 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:46,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:46,037 INFO L93 Difference]: Finished difference Result 6010 states and 16421 transitions. [2021-06-05 18:25:46,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 18:25:46,037 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-05 18:25:46,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:46,042 INFO L225 Difference]: With dead ends: 6010 [2021-06-05 18:25:46,042 INFO L226 Difference]: Without dead ends: 5521 [2021-06-05 18:25:46,043 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1638 ImplicationChecksByTransitivity, 1031.6ms TimeCoverageRelationStatistics Valid=1600, Invalid=4562, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 18:25:46,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5521 states. [2021-06-05 18:25:46,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5521 to 4828. [2021-06-05 18:25:46,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4828 states, 4827 states have (on average 2.834679925419515) internal successors, (13683), 4827 states have internal predecessors, (13683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:46,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4828 states to 4828 states and 13683 transitions. [2021-06-05 18:25:46,086 INFO L78 Accepts]: Start accepts. Automaton has 4828 states and 13683 transitions. Word has length 145 [2021-06-05 18:25:46,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:46,086 INFO L482 AbstractCegarLoop]: Abstraction has 4828 states and 13683 transitions. [2021-06-05 18:25:46,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:46,086 INFO L276 IsEmpty]: Start isEmpty. Operand 4828 states and 13683 transitions. [2021-06-05 18:25:46,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:25:46,089 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:46,090 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:46,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-05 18:25:46,290 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:46,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:46,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1174739515, now seen corresponding path program 271 times [2021-06-05 18:25:46,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:46,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333157954] [2021-06-05 18:25:46,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:46,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:46,573 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:46,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:46,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333157954] [2021-06-05 18:25:46,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333157954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:46,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538217976] [2021-06-05 18:25:46,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:46,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:46,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:25:46,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:46,856 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:46,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538217976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:46,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:46,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 33 [2021-06-05 18:25:46,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744648378] [2021-06-05 18:25:46,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:25:46,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:46,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:25:46,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:25:46,858 INFO L87 Difference]: Start difference. First operand 4828 states and 13683 transitions. Second operand has 33 states, 33 states have (on average 5.454545454545454) internal successors, (180), 33 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:47,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:47,471 INFO L93 Difference]: Finished difference Result 6068 states and 16483 transitions. [2021-06-05 18:25:47,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:25:47,471 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.454545454545454) internal successors, (180), 33 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:25:47,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:47,477 INFO L225 Difference]: With dead ends: 6068 [2021-06-05 18:25:47,477 INFO L226 Difference]: Without dead ends: 5734 [2021-06-05 18:25:47,477 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 733.3ms TimeCoverageRelationStatistics Valid=1064, Invalid=2842, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 18:25:47,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5734 states. [2021-06-05 18:25:47,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5734 to 4913. [2021-06-05 18:25:47,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4913 states, 4912 states have (on average 2.8202361563517915) internal successors, (13853), 4912 states have internal predecessors, (13853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:47,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4913 states to 4913 states and 13853 transitions. [2021-06-05 18:25:47,524 INFO L78 Accepts]: Start accepts. Automaton has 4913 states and 13853 transitions. Word has length 150 [2021-06-05 18:25:47,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:47,524 INFO L482 AbstractCegarLoop]: Abstraction has 4913 states and 13853 transitions. [2021-06-05 18:25:47,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.454545454545454) internal successors, (180), 33 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:47,524 INFO L276 IsEmpty]: Start isEmpty. Operand 4913 states and 13853 transitions. [2021-06-05 18:25:47,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:25:47,528 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:47,528 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:47,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-05 18:25:47,733 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:47,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:47,733 INFO L82 PathProgramCache]: Analyzing trace with hash 174102121, now seen corresponding path program 272 times [2021-06-05 18:25:47,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:47,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727613879] [2021-06-05 18:25:47,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:47,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:48,020 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:48,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:48,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727613879] [2021-06-05 18:25:48,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727613879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:48,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198923148] [2021-06-05 18:25:48,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:48,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:25:48,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:48,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:25:48,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:48,291 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:48,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198923148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:48,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:48,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-05 18:25:48,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319873698] [2021-06-05 18:25:48,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:25:48,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:48,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:25:48,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:25:48,292 INFO L87 Difference]: Start difference. First operand 4913 states and 13853 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:48,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:48,782 INFO L93 Difference]: Finished difference Result 7061 states and 18277 transitions. [2021-06-05 18:25:48,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:25:48,783 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:25:48,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:48,789 INFO L225 Difference]: With dead ends: 7061 [2021-06-05 18:25:48,789 INFO L226 Difference]: Without dead ends: 6791 [2021-06-05 18:25:48,790 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 618.9ms TimeCoverageRelationStatistics Valid=894, Invalid=2298, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 18:25:48,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6791 states. [2021-06-05 18:25:48,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6791 to 4928. [2021-06-05 18:25:48,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:48,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-05 18:25:48,840 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-05 18:25:48,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:48,840 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-05 18:25:48,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:48,840 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-05 18:25:48,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:25:48,843 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:48,843 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:49,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2021-06-05 18:25:49,044 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:49,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:49,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1057153881, now seen corresponding path program 273 times [2021-06-05 18:25:49,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:49,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872739033] [2021-06-05 18:25:49,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:49,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:49,334 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:49,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:49,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872739033] [2021-06-05 18:25:49,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872739033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:49,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560719099] [2021-06-05 18:25:49,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:49,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 18:25:49,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:49,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:25:49,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:49,623 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:49,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560719099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:49,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:49,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-05 18:25:49,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104292409] [2021-06-05 18:25:49,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:25:49,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:49,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:25:49,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:25:49,624 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:50,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:50,172 INFO L93 Difference]: Finished difference Result 6946 states and 18047 transitions. [2021-06-05 18:25:50,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:25:50,173 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:25:50,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:50,179 INFO L225 Difference]: With dead ends: 6946 [2021-06-05 18:25:50,179 INFO L226 Difference]: Without dead ends: 6676 [2021-06-05 18:25:50,180 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 680.3ms TimeCoverageRelationStatistics Valid=971, Invalid=2689, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 18:25:50,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6676 states. [2021-06-05 18:25:50,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6676 to 4928. [2021-06-05 18:25:50,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:50,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-05 18:25:50,228 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-05 18:25:50,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:50,229 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-05 18:25:50,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:50,229 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-05 18:25:50,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:25:50,232 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:50,232 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:50,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:50,433 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:50,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:50,433 INFO L82 PathProgramCache]: Analyzing trace with hash -835055513, now seen corresponding path program 274 times [2021-06-05 18:25:50,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:50,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007354078] [2021-06-05 18:25:50,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:50,720 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:50,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:50,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007354078] [2021-06-05 18:25:50,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007354078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:50,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687758783] [2021-06-05 18:25:50,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:50,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:25:50,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:50,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:25:50,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:50,992 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:50,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687758783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:50,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:50,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-05 18:25:50,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79478210] [2021-06-05 18:25:50,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:25:50,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:50,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:25:50,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:25:50,993 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:51,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:51,510 INFO L93 Difference]: Finished difference Result 6921 states and 17997 transitions. [2021-06-05 18:25:51,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:25:51,510 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:25:51,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:51,517 INFO L225 Difference]: With dead ends: 6921 [2021-06-05 18:25:51,517 INFO L226 Difference]: Without dead ends: 6651 [2021-06-05 18:25:51,517 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 625.1ms TimeCoverageRelationStatistics Valid=894, Invalid=2528, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 18:25:51,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6651 states. [2021-06-05 18:25:51,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6651 to 4928. [2021-06-05 18:25:51,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:51,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-05 18:25:51,566 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-05 18:25:51,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:51,566 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-05 18:25:51,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:51,566 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-05 18:25:51,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:25:51,569 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:51,569 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:51,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-06-05 18:25:51,770 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:51,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:51,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1006291287, now seen corresponding path program 275 times [2021-06-05 18:25:51,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:51,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951975765] [2021-06-05 18:25:51,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:51,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:52,084 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:52,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:52,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951975765] [2021-06-05 18:25:52,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951975765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:52,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982159349] [2021-06-05 18:25:52,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:52,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 18:25:52,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:52,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:25:52,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:52,352 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:52,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982159349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:52,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:52,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-05 18:25:52,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901069807] [2021-06-05 18:25:52,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:25:52,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:52,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:25:52,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:25:52,353 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:53,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:53,022 INFO L93 Difference]: Finished difference Result 6871 states and 17897 transitions. [2021-06-05 18:25:53,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:25:53,022 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:25:53,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:53,029 INFO L225 Difference]: With dead ends: 6871 [2021-06-05 18:25:53,029 INFO L226 Difference]: Without dead ends: 6601 [2021-06-05 18:25:53,029 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 746.7ms TimeCoverageRelationStatistics Valid=979, Invalid=2927, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 18:25:53,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6601 states. [2021-06-05 18:25:53,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6601 to 4928. [2021-06-05 18:25:53,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:53,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-05 18:25:53,077 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-05 18:25:53,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:53,077 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-05 18:25:53,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:53,078 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-05 18:25:53,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:25:53,081 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:53,081 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:53,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:53,281 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:53,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:53,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1887850469, now seen corresponding path program 276 times [2021-06-05 18:25:53,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:53,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494562827] [2021-06-05 18:25:53,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:53,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:53,562 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:53,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:53,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494562827] [2021-06-05 18:25:53,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494562827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:53,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21878631] [2021-06-05 18:25:53,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:53,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 18:25:53,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:53,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:25:53,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:53,822 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:53,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21878631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:53,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:53,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-05 18:25:53,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034938214] [2021-06-05 18:25:53,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:25:53,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:53,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:25:53,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:25:53,823 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:54,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:54,378 INFO L93 Difference]: Finished difference Result 6821 states and 17797 transitions. [2021-06-05 18:25:54,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:25:54,379 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:25:54,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:54,385 INFO L225 Difference]: With dead ends: 6821 [2021-06-05 18:25:54,385 INFO L226 Difference]: Without dead ends: 6551 [2021-06-05 18:25:54,386 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 662.2ms TimeCoverageRelationStatistics Valid=910, Invalid=2750, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 18:25:54,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6551 states. [2021-06-05 18:25:54,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6551 to 4928. [2021-06-05 18:25:54,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:54,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-05 18:25:54,435 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-05 18:25:54,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:54,435 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-05 18:25:54,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:54,436 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-05 18:25:54,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:25:54,439 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:54,439 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:54,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:54,640 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:54,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:54,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1245476053, now seen corresponding path program 277 times [2021-06-05 18:25:54,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:54,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776667050] [2021-06-05 18:25:54,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:54,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:54,913 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:54,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:54,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776667050] [2021-06-05 18:25:54,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776667050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:54,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059357583] [2021-06-05 18:25:54,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:54,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:54,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:25:54,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:55,171 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:55,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059357583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:55,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:55,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-05 18:25:55,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427403433] [2021-06-05 18:25:55,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:25:55,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:55,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:25:55,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:25:55,171 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:55,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:55,822 INFO L93 Difference]: Finished difference Result 6771 states and 17697 transitions. [2021-06-05 18:25:55,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:25:55,822 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:25:55,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:55,829 INFO L225 Difference]: With dead ends: 6771 [2021-06-05 18:25:55,829 INFO L226 Difference]: Without dead ends: 6501 [2021-06-05 18:25:55,829 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 750.3ms TimeCoverageRelationStatistics Valid=1003, Invalid=3157, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 18:25:55,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6501 states. [2021-06-05 18:25:55,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6501 to 4928. [2021-06-05 18:25:55,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:55,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-05 18:25:55,876 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-05 18:25:55,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:55,876 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-05 18:25:55,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:55,876 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-05 18:25:55,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:25:55,901 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:55,901 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:56,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:56,102 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:56,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:56,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1198929123, now seen corresponding path program 278 times [2021-06-05 18:25:56,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:56,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809576044] [2021-06-05 18:25:56,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:56,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:56,357 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:56,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:56,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809576044] [2021-06-05 18:25:56,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809576044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:56,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518436681] [2021-06-05 18:25:56,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:56,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:25:56,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:56,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:25:56,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:56,601 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:56,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518436681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:56,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:56,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-05 18:25:56,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963177484] [2021-06-05 18:25:56,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:25:56,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:56,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:25:56,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:25:56,602 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:57,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:57,231 INFO L93 Difference]: Finished difference Result 6721 states and 17597 transitions. [2021-06-05 18:25:57,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:25:57,231 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:25:57,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:57,238 INFO L225 Difference]: With dead ends: 6721 [2021-06-05 18:25:57,238 INFO L226 Difference]: Without dead ends: 6451 [2021-06-05 18:25:57,239 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 664.3ms TimeCoverageRelationStatistics Valid=942, Invalid=2964, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 18:25:57,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6451 states. [2021-06-05 18:25:57,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6451 to 4928. [2021-06-05 18:25:57,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:57,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-05 18:25:57,288 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-05 18:25:57,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:57,288 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-05 18:25:57,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:57,288 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-05 18:25:57,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:25:57,292 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:57,292 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:57,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:57,492 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:57,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:57,493 INFO L82 PathProgramCache]: Analyzing trace with hash 280544723, now seen corresponding path program 279 times [2021-06-05 18:25:57,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:57,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601042622] [2021-06-05 18:25:57,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:57,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:57,753 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:57,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:57,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601042622] [2021-06-05 18:25:57,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601042622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:57,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859362667] [2021-06-05 18:25:57,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:57,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 18:25:57,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:57,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 18:25:57,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:58,025 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:58,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859362667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:58,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:58,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-05 18:25:58,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604064122] [2021-06-05 18:25:58,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:25:58,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:58,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:25:58,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:25:58,026 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:58,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:58,771 INFO L93 Difference]: Finished difference Result 6671 states and 17497 transitions. [2021-06-05 18:25:58,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:25:58,771 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:25:58,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:58,776 INFO L225 Difference]: With dead ends: 6671 [2021-06-05 18:25:58,776 INFO L226 Difference]: Without dead ends: 6401 [2021-06-05 18:25:58,776 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 760.3ms TimeCoverageRelationStatistics Valid=952, Invalid=3208, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 18:25:58,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6401 states. [2021-06-05 18:25:58,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6401 to 4928. [2021-06-05 18:25:58,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:58,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-05 18:25:58,822 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-05 18:25:58,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:58,823 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-05 18:25:58,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:58,823 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-05 18:25:58,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:25:58,826 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:58,826 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:25:59,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-06-05 18:25:59,027 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:59,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:59,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1496146079, now seen corresponding path program 280 times [2021-06-05 18:25:59,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:59,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983017033] [2021-06-05 18:25:59,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:59,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:59,269 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:59,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:59,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983017033] [2021-06-05 18:25:59,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983017033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:59,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126233584] [2021-06-05 18:25:59,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:59,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:25:59,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:59,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:25:59,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:59,510 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:59,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126233584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:59,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:59,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-05 18:25:59,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760646662] [2021-06-05 18:25:59,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:25:59,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:59,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:25:59,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:25:59,510 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:00,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:00,195 INFO L93 Difference]: Finished difference Result 6621 states and 17397 transitions. [2021-06-05 18:26:00,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:26:00,195 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:26:00,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:00,201 INFO L225 Difference]: With dead ends: 6621 [2021-06-05 18:26:00,201 INFO L226 Difference]: Without dead ends: 6351 [2021-06-05 18:26:00,202 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 691.4ms TimeCoverageRelationStatistics Valid=990, Invalid=3170, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 18:26:00,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6351 states. [2021-06-05 18:26:00,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6351 to 4928. [2021-06-05 18:26:00,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:00,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-05 18:26:00,249 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-05 18:26:00,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:00,249 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-05 18:26:00,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:00,249 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-05 18:26:00,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:26:00,253 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:00,253 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:00,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-06-05 18:26:00,453 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:00,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:00,453 INFO L82 PathProgramCache]: Analyzing trace with hash 603495505, now seen corresponding path program 281 times [2021-06-05 18:26:00,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:00,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972120280] [2021-06-05 18:26:00,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:00,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:00,700 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:00,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:00,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972120280] [2021-06-05 18:26:00,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972120280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:00,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133834585] [2021-06-05 18:26:00,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:00,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 18:26:00,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:00,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:26:00,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:00,960 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:00,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133834585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:00,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:00,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-05 18:26:00,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009115022] [2021-06-05 18:26:00,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:26:00,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:00,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:26:00,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:26:00,961 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:01,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:01,750 INFO L93 Difference]: Finished difference Result 6571 states and 17297 transitions. [2021-06-05 18:26:01,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:26:01,751 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:26:01,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:01,756 INFO L225 Difference]: With dead ends: 6571 [2021-06-05 18:26:01,756 INFO L226 Difference]: Without dead ends: 6301 [2021-06-05 18:26:01,757 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 832.9ms TimeCoverageRelationStatistics Valid=1099, Invalid=3593, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 18:26:01,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6301 states. [2021-06-05 18:26:01,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6301 to 4928. [2021-06-05 18:26:01,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:01,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-05 18:26:01,803 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-05 18:26:01,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:01,803 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-05 18:26:01,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:01,803 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-05 18:26:01,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:26:01,807 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:01,807 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:02,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-06-05 18:26:02,008 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:02,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:02,008 INFO L82 PathProgramCache]: Analyzing trace with hash 2113695583, now seen corresponding path program 282 times [2021-06-05 18:26:02,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:02,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821335029] [2021-06-05 18:26:02,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:02,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:02,241 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:02,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:02,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821335029] [2021-06-05 18:26:02,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821335029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:02,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105246255] [2021-06-05 18:26:02,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:02,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 18:26:02,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:02,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:26:02,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:02,503 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:02,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105246255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:02,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:02,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-05 18:26:02,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705607291] [2021-06-05 18:26:02,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:26:02,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:02,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:26:02,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:26:02,504 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:03,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:03,177 INFO L93 Difference]: Finished difference Result 6521 states and 17197 transitions. [2021-06-05 18:26:03,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:26:03,177 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:26:03,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:03,183 INFO L225 Difference]: With dead ends: 6521 [2021-06-05 18:26:03,183 INFO L226 Difference]: Without dead ends: 6251 [2021-06-05 18:26:03,184 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 706.7ms TimeCoverageRelationStatistics Valid=1054, Invalid=3368, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 18:26:03,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6251 states. [2021-06-05 18:26:03,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6251 to 4928. [2021-06-05 18:26:03,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:03,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-05 18:26:03,231 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-05 18:26:03,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:03,231 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-05 18:26:03,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:03,231 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-05 18:26:03,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:26:03,234 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:03,234 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:03,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:03,435 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:03,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:03,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1541613489, now seen corresponding path program 283 times [2021-06-05 18:26:03,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:03,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494659063] [2021-06-05 18:26:03,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:03,705 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:03,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:03,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494659063] [2021-06-05 18:26:03,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494659063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:03,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632004944] [2021-06-05 18:26:03,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:03,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:03,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:26:03,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:03,986 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:03,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632004944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:03,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:03,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-05 18:26:03,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174876219] [2021-06-05 18:26:03,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:26:03,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:03,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:26:03,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:26:03,987 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:04,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:04,832 INFO L93 Difference]: Finished difference Result 6471 states and 17097 transitions. [2021-06-05 18:26:04,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:26:04,832 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:26:04,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:04,838 INFO L225 Difference]: With dead ends: 6471 [2021-06-05 18:26:04,838 INFO L226 Difference]: Without dead ends: 6201 [2021-06-05 18:26:04,838 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 897.7ms TimeCoverageRelationStatistics Valid=1171, Invalid=3799, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 18:26:04,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6201 states. [2021-06-05 18:26:04,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6201 to 4928. [2021-06-05 18:26:04,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:04,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-05 18:26:04,885 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-05 18:26:04,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:04,886 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-05 18:26:04,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:04,886 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-05 18:26:04,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:26:04,889 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:04,889 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:05,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:05,090 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:05,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:05,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1978434781, now seen corresponding path program 284 times [2021-06-05 18:26:05,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:05,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292223661] [2021-06-05 18:26:05,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:05,321 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:05,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:05,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292223661] [2021-06-05 18:26:05,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292223661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:05,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708967360] [2021-06-05 18:26:05,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:05,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:26:05,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:05,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:26:05,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:05,558 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:05,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708967360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:05,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:05,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-05 18:26:05,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293293491] [2021-06-05 18:26:05,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:26:05,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:05,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:26:05,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:26:05,559 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:06,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:06,257 INFO L93 Difference]: Finished difference Result 6421 states and 16997 transitions. [2021-06-05 18:26:06,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:26:06,257 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:26:06,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:06,263 INFO L225 Difference]: With dead ends: 6421 [2021-06-05 18:26:06,263 INFO L226 Difference]: Without dead ends: 6151 [2021-06-05 18:26:06,264 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 732.1ms TimeCoverageRelationStatistics Valid=1134, Invalid=3558, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 18:26:06,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6151 states. [2021-06-05 18:26:06,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6151 to 4928. [2021-06-05 18:26:06,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:06,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-05 18:26:06,311 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-05 18:26:06,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:06,311 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-05 18:26:06,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:06,312 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-05 18:26:06,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:26:06,315 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:06,315 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:06,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:06,516 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:06,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:06,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1524521421, now seen corresponding path program 285 times [2021-06-05 18:26:06,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:06,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075892677] [2021-06-05 18:26:06,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:06,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:06,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:06,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075892677] [2021-06-05 18:26:06,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075892677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:06,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40994551] [2021-06-05 18:26:06,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:06,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 18:26:06,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:06,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 18:26:06,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:07,047 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:07,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40994551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:07,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:07,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-05 18:26:07,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715425627] [2021-06-05 18:26:07,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:26:07,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:07,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:26:07,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:26:07,048 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:08,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:08,049 INFO L93 Difference]: Finished difference Result 6371 states and 16897 transitions. [2021-06-05 18:26:08,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:26:08,049 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:26:08,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:08,055 INFO L225 Difference]: With dead ends: 6371 [2021-06-05 18:26:08,055 INFO L226 Difference]: Without dead ends: 6101 [2021-06-05 18:26:08,056 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 1005.2ms TimeCoverageRelationStatistics Valid=1114, Invalid=3856, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 18:26:08,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6101 states. [2021-06-05 18:26:08,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6101 to 4928. [2021-06-05 18:26:08,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:08,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-05 18:26:08,109 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-05 18:26:08,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:08,109 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-05 18:26:08,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:08,110 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-05 18:26:08,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:26:08,113 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:08,113 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:08,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:08,329 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:08,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:08,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1892433957, now seen corresponding path program 286 times [2021-06-05 18:26:08,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:08,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976343468] [2021-06-05 18:26:08,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:08,573 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:08,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:08,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976343468] [2021-06-05 18:26:08,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976343468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:08,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191464022] [2021-06-05 18:26:08,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:08,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:26:08,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:08,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:26:08,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:08,811 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:08,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191464022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:08,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:08,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-05 18:26:08,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532856845] [2021-06-05 18:26:08,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:26:08,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:08,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:26:08,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:26:08,812 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:09,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:09,573 INFO L93 Difference]: Finished difference Result 6321 states and 16797 transitions. [2021-06-05 18:26:09,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:26:09,573 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:26:09,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:09,578 INFO L225 Difference]: With dead ends: 6321 [2021-06-05 18:26:09,578 INFO L226 Difference]: Without dead ends: 6051 [2021-06-05 18:26:09,578 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 801.8ms TimeCoverageRelationStatistics Valid=1230, Invalid=3740, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 18:26:09,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6051 states. [2021-06-05 18:26:09,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6051 to 4928. [2021-06-05 18:26:09,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:09,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-05 18:26:09,622 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-05 18:26:09,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:09,622 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-05 18:26:09,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:09,623 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-05 18:26:09,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:26:09,626 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:09,626 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:09,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,290 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:09,826 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:09,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:09,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1502478539, now seen corresponding path program 287 times [2021-06-05 18:26:09,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:09,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368608321] [2021-06-05 18:26:09,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:10,062 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:10,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:10,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368608321] [2021-06-05 18:26:10,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368608321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:10,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422049690] [2021-06-05 18:26:10,063 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:10,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 18:26:10,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:10,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:26:10,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:10,314 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:10,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422049690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:10,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:10,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-05 18:26:10,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914172247] [2021-06-05 18:26:10,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:26:10,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:10,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:26:10,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:26:10,315 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:11,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:11,238 INFO L93 Difference]: Finished difference Result 6271 states and 16697 transitions. [2021-06-05 18:26:11,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 18:26:11,239 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:26:11,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:11,244 INFO L225 Difference]: With dead ends: 6271 [2021-06-05 18:26:11,244 INFO L226 Difference]: Without dead ends: 6001 [2021-06-05 18:26:11,244 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 945.7ms TimeCoverageRelationStatistics Valid=1363, Invalid=4187, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 18:26:11,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6001 states. [2021-06-05 18:26:11,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6001 to 4928. [2021-06-05 18:26:11,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:11,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-05 18:26:11,292 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-05 18:26:11,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:11,292 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-05 18:26:11,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:11,293 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-05 18:26:11,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:26:11,296 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:11,296 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:11,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:11,497 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:11,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:11,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1073414233, now seen corresponding path program 288 times [2021-06-05 18:26:11,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:11,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526101395] [2021-06-05 18:26:11,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:11,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:11,723 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:11,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:11,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526101395] [2021-06-05 18:26:11,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526101395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:11,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90535850] [2021-06-05 18:26:11,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:11,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 18:26:11,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:11,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:26:11,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:11,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90535850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:11,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:11,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-05 18:26:11,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215028514] [2021-06-05 18:26:11,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:26:11,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:11,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:26:11,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:26:11,963 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:12,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:12,793 INFO L93 Difference]: Finished difference Result 6221 states and 16597 transitions. [2021-06-05 18:26:12,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 18:26:12,794 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:26:12,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:12,799 INFO L225 Difference]: With dead ends: 6221 [2021-06-05 18:26:12,799 INFO L226 Difference]: Without dead ends: 5951 [2021-06-05 18:26:12,799 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 815.0ms TimeCoverageRelationStatistics Valid=1342, Invalid=3914, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 18:26:12,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5951 states. [2021-06-05 18:26:12,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5951 to 4928. [2021-06-05 18:26:12,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:12,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-05 18:26:12,844 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-05 18:26:12,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:12,844 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-05 18:26:12,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:12,845 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-05 18:26:12,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:26:12,848 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:12,848 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:13,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:13,048 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:13,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:13,049 INFO L82 PathProgramCache]: Analyzing trace with hash 387231049, now seen corresponding path program 289 times [2021-06-05 18:26:13,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:13,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030270328] [2021-06-05 18:26:13,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:13,275 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:13,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:13,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030270328] [2021-06-05 18:26:13,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030270328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:13,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995715985] [2021-06-05 18:26:13,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:13,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:13,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:26:13,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:13,527 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:13,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995715985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:13,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:13,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-05 18:26:13,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298863736] [2021-06-05 18:26:13,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:26:13,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:13,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:26:13,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:26:13,528 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:14,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:14,548 INFO L93 Difference]: Finished difference Result 6171 states and 16497 transitions. [2021-06-05 18:26:14,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 18:26:14,549 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:26:14,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:14,554 INFO L225 Difference]: With dead ends: 6171 [2021-06-05 18:26:14,554 INFO L226 Difference]: Without dead ends: 5901 [2021-06-05 18:26:14,555 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1441 ImplicationChecksByTransitivity, 992.8ms TimeCoverageRelationStatistics Valid=1483, Invalid=4369, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 18:26:14,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5901 states. [2021-06-05 18:26:14,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5901 to 4928. [2021-06-05 18:26:14,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:14,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-05 18:26:14,601 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-05 18:26:14,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:14,601 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-05 18:26:14,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:14,601 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-05 18:26:14,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:26:14,604 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:14,604 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:14,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:14,805 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:14,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:14,805 INFO L82 PathProgramCache]: Analyzing trace with hash 302196311, now seen corresponding path program 290 times [2021-06-05 18:26:14,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:14,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179109019] [2021-06-05 18:26:14,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:14,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:15,049 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:15,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:15,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179109019] [2021-06-05 18:26:15,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179109019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:15,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724333207] [2021-06-05 18:26:15,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:15,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:26:15,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:15,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:26:15,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:15,278 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:15,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724333207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:15,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:15,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-05 18:26:15,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560739559] [2021-06-05 18:26:15,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:26:15,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:15,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:26:15,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:26:15,279 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:16,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:16,112 INFO L93 Difference]: Finished difference Result 6121 states and 16397 transitions. [2021-06-05 18:26:16,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 18:26:16,112 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:26:16,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:16,118 INFO L225 Difference]: With dead ends: 6121 [2021-06-05 18:26:16,118 INFO L226 Difference]: Without dead ends: 5851 [2021-06-05 18:26:16,119 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1408 ImplicationChecksByTransitivity, 842.9ms TimeCoverageRelationStatistics Valid=1470, Invalid=4080, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 18:26:16,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5851 states. [2021-06-05 18:26:16,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5851 to 4928. [2021-06-05 18:26:16,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:16,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-05 18:26:16,164 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-05 18:26:16,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:16,164 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-05 18:26:16,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:16,164 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-05 18:26:16,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:26:16,168 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:16,168 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:16,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-06-05 18:26:16,368 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:16,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:16,368 INFO L82 PathProgramCache]: Analyzing trace with hash 234045255, now seen corresponding path program 291 times [2021-06-05 18:26:16,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:16,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111215832] [2021-06-05 18:26:16,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:16,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:16,599 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:16,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:16,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111215832] [2021-06-05 18:26:16,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111215832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:16,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556913625] [2021-06-05 18:26:16,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:16,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 18:26:16,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:16,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:26:16,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:16,849 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:16,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556913625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:16,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:16,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-05 18:26:16,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131762804] [2021-06-05 18:26:16,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:26:16,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:16,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:26:16,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:26:16,850 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:17,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:17,857 INFO L93 Difference]: Finished difference Result 6071 states and 16297 transitions. [2021-06-05 18:26:17,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 18:26:17,858 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:26:17,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:17,863 INFO L225 Difference]: With dead ends: 6071 [2021-06-05 18:26:17,863 INFO L226 Difference]: Without dead ends: 5801 [2021-06-05 18:26:17,863 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 997.6ms TimeCoverageRelationStatistics Valid=1393, Invalid=4459, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 18:26:17,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5801 states. [2021-06-05 18:26:17,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5801 to 4928. [2021-06-05 18:26:17,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:17,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-05 18:26:17,907 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-05 18:26:17,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:17,907 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-05 18:26:17,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:17,907 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-05 18:26:17,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:26:17,910 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:17,910 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:18,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:18,111 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:18,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:18,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1062923819, now seen corresponding path program 292 times [2021-06-05 18:26:18,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:18,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160755300] [2021-06-05 18:26:18,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:18,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:18,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:18,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160755300] [2021-06-05 18:26:18,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160755300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:18,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379753523] [2021-06-05 18:26:18,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:18,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:26:18,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:18,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:26:18,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:18,575 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:18,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379753523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:18,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:18,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-05 18:26:18,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290689888] [2021-06-05 18:26:18,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:26:18,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:18,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:26:18,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:26:18,576 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:19,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:19,448 INFO L93 Difference]: Finished difference Result 6021 states and 16197 transitions. [2021-06-05 18:26:19,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 18:26:19,448 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:26:19,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:19,454 INFO L225 Difference]: With dead ends: 6021 [2021-06-05 18:26:19,454 INFO L226 Difference]: Without dead ends: 5751 [2021-06-05 18:26:19,454 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 857.7ms TimeCoverageRelationStatistics Valid=1614, Invalid=4238, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 18:26:19,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5751 states. [2021-06-05 18:26:19,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5751 to 4928. [2021-06-05 18:26:19,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:19,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-05 18:26:19,500 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-05 18:26:19,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:19,500 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-05 18:26:19,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:19,500 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-05 18:26:19,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:26:19,504 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:19,504 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:19,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-05 18:26:19,704 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:19,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:19,704 INFO L82 PathProgramCache]: Analyzing trace with hash -633170235, now seen corresponding path program 293 times [2021-06-05 18:26:19,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:19,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840326636] [2021-06-05 18:26:19,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:19,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:19,932 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:19,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:19,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840326636] [2021-06-05 18:26:19,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840326636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:19,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997055307] [2021-06-05 18:26:19,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:19,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 18:26:19,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:19,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:26:19,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:20,205 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:20,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997055307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:20,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:20,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-05 18:26:20,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949020005] [2021-06-05 18:26:20,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:26:20,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:20,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:26:20,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:26:20,206 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:21,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:21,398 INFO L93 Difference]: Finished difference Result 6479 states and 17463 transitions. [2021-06-05 18:26:21,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 18:26:21,399 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:26:21,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:21,404 INFO L225 Difference]: With dead ends: 6479 [2021-06-05 18:26:21,404 INFO L226 Difference]: Without dead ends: 5856 [2021-06-05 18:26:21,405 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1780 ImplicationChecksByTransitivity, 1149.2ms TimeCoverageRelationStatistics Valid=1794, Invalid=5012, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 18:26:21,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5856 states. [2021-06-05 18:26:21,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5856 to 4838. [2021-06-05 18:26:21,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4838 states, 4837 states have (on average 2.8215836262145957) internal successors, (13648), 4837 states have internal predecessors, (13648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:21,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4838 states to 4838 states and 13648 transitions. [2021-06-05 18:26:21,457 INFO L78 Accepts]: Start accepts. Automaton has 4838 states and 13648 transitions. Word has length 150 [2021-06-05 18:26:21,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:21,457 INFO L482 AbstractCegarLoop]: Abstraction has 4838 states and 13648 transitions. [2021-06-05 18:26:21,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:21,457 INFO L276 IsEmpty]: Start isEmpty. Operand 4838 states and 13648 transitions. [2021-06-05 18:26:21,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:26:21,460 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:21,460 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:21,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-05 18:26:21,661 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:21,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:21,661 INFO L82 PathProgramCache]: Analyzing trace with hash -690904365, now seen corresponding path program 294 times [2021-06-05 18:26:21,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:21,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162995188] [2021-06-05 18:26:21,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:21,892 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:21,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:21,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162995188] [2021-06-05 18:26:21,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162995188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:21,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483789955] [2021-06-05 18:26:21,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:21,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 18:26:21,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:21,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:26:21,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:22,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483789955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:22,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:22,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-05 18:26:22,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674065971] [2021-06-05 18:26:22,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:26:22,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:22,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:26:22,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:26:22,131 INFO L87 Difference]: Start difference. First operand 4838 states and 13648 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:23,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:23,129 INFO L93 Difference]: Finished difference Result 6708 states and 18181 transitions. [2021-06-05 18:26:23,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 18:26:23,129 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:26:23,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:23,134 INFO L225 Difference]: With dead ends: 6708 [2021-06-05 18:26:23,134 INFO L226 Difference]: Without dead ends: 6438 [2021-06-05 18:26:23,135 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1641 ImplicationChecksByTransitivity, 978.3ms TimeCoverageRelationStatistics Valid=1775, Invalid=4387, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 18:26:23,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6438 states. [2021-06-05 18:26:23,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6438 to 5018. [2021-06-05 18:26:23,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5017 states have (on average 2.8317719752840342) internal successors, (14207), 5017 states have internal predecessors, (14207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:23,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 14207 transitions. [2021-06-05 18:26:23,182 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 14207 transitions. Word has length 150 [2021-06-05 18:26:23,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:23,182 INFO L482 AbstractCegarLoop]: Abstraction has 5018 states and 14207 transitions. [2021-06-05 18:26:23,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:23,182 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 14207 transitions. [2021-06-05 18:26:23,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:26:23,186 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:23,186 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:23,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-06-05 18:26:23,386 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:23,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:23,386 INFO L82 PathProgramCache]: Analyzing trace with hash -668561115, now seen corresponding path program 295 times [2021-06-05 18:26:23,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:23,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497665523] [2021-06-05 18:26:23,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:23,619 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:23,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:23,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497665523] [2021-06-05 18:26:23,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497665523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:23,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732605799] [2021-06-05 18:26:23,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:23,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:26:23,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:23,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732605799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:23,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:23,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-05 18:26:23,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259264442] [2021-06-05 18:26:23,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:26:23,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:23,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:26:23,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:26:23,856 INFO L87 Difference]: Start difference. First operand 5018 states and 14207 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:24,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:24,977 INFO L93 Difference]: Finished difference Result 6195 states and 16881 transitions. [2021-06-05 18:26:24,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 18:26:24,980 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:26:24,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:24,986 INFO L225 Difference]: With dead ends: 6195 [2021-06-05 18:26:24,986 INFO L226 Difference]: Without dead ends: 5706 [2021-06-05 18:26:24,987 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 1109.4ms TimeCoverageRelationStatistics Valid=1911, Invalid=4731, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 18:26:24,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5706 states. [2021-06-05 18:26:25,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5706 to 3313. [2021-06-05 18:26:25,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3313 states, 3312 states have (on average 2.7409420289855073) internal successors, (9078), 3312 states have internal predecessors, (9078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:25,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3313 states to 3313 states and 9078 transitions. [2021-06-05 18:26:25,024 INFO L78 Accepts]: Start accepts. Automaton has 3313 states and 9078 transitions. Word has length 150 [2021-06-05 18:26:25,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:25,024 INFO L482 AbstractCegarLoop]: Abstraction has 3313 states and 9078 transitions. [2021-06-05 18:26:25,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:25,024 INFO L276 IsEmpty]: Start isEmpty. Operand 3313 states and 9078 transitions. [2021-06-05 18:26:25,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:26:25,026 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:25,026 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:25,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:25,227 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:25,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:25,227 INFO L82 PathProgramCache]: Analyzing trace with hash 771249274, now seen corresponding path program 296 times [2021-06-05 18:26:25,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:25,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39634564] [2021-06-05 18:26:25,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:25,525 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:25,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:25,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39634564] [2021-06-05 18:26:25,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39634564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:25,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196356983] [2021-06-05 18:26:25,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:25,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:26:25,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:25,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:26:25,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:25,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196356983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:25,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:25,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-05 18:26:25,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570963138] [2021-06-05 18:26:25,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:26:25,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:25,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:26:25,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:26:25,783 INFO L87 Difference]: Start difference. First operand 3313 states and 9078 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:26,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:26,310 INFO L93 Difference]: Finished difference Result 4931 states and 12517 transitions. [2021-06-05 18:26:26,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:26:26,311 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-05 18:26:26,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:26,315 INFO L225 Difference]: With dead ends: 4931 [2021-06-05 18:26:26,315 INFO L226 Difference]: Without dead ends: 4661 [2021-06-05 18:26:26,315 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 638.2ms TimeCoverageRelationStatistics Valid=935, Invalid=2605, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 18:26:26,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4661 states. [2021-06-05 18:26:26,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4661 to 3388. [2021-06-05 18:26:26,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3388 states, 3387 states have (on average 2.746678476527901) internal successors, (9303), 3387 states have internal predecessors, (9303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:26,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 9303 transitions. [2021-06-05 18:26:26,349 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 9303 transitions. Word has length 155 [2021-06-05 18:26:26,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:26,349 INFO L482 AbstractCegarLoop]: Abstraction has 3388 states and 9303 transitions. [2021-06-05 18:26:26,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:26,349 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 9303 transitions. [2021-06-05 18:26:26,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:26:26,351 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:26,351 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:26,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-06-05 18:26:26,565 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:26,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:26,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1654301034, now seen corresponding path program 297 times [2021-06-05 18:26:26,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:26,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749232518] [2021-06-05 18:26:26,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:26,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:26,863 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:26,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:26,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749232518] [2021-06-05 18:26:26,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749232518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:26,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605896539] [2021-06-05 18:26:26,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:26,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 18:26:26,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:26,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:26:26,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:27,126 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:27,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605896539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:27,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:27,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-05 18:26:27,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857397593] [2021-06-05 18:26:27,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:26:27,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:27,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:26:27,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:26:27,127 INFO L87 Difference]: Start difference. First operand 3388 states and 9303 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:27,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:27,713 INFO L93 Difference]: Finished difference Result 5551 states and 13832 transitions. [2021-06-05 18:26:27,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:26:27,713 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-05 18:26:27,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:27,718 INFO L225 Difference]: With dead ends: 5551 [2021-06-05 18:26:27,718 INFO L226 Difference]: Without dead ends: 5281 [2021-06-05 18:26:27,718 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 709.2ms TimeCoverageRelationStatistics Valid=997, Invalid=2909, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 18:26:27,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5281 states. [2021-06-05 18:26:27,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5281 to 3463. [2021-06-05 18:26:27,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3463 states, 3462 states have (on average 2.752166377816291) internal successors, (9528), 3462 states have internal predecessors, (9528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:27,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3463 states to 3463 states and 9528 transitions. [2021-06-05 18:26:27,754 INFO L78 Accepts]: Start accepts. Automaton has 3463 states and 9528 transitions. Word has length 155 [2021-06-05 18:26:27,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:27,754 INFO L482 AbstractCegarLoop]: Abstraction has 3463 states and 9528 transitions. [2021-06-05 18:26:27,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:27,754 INFO L276 IsEmpty]: Start isEmpty. Operand 3463 states and 9528 transitions. [2021-06-05 18:26:27,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:26:27,756 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:27,756 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:27,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:27,957 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:27,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:27,957 INFO L82 PathProgramCache]: Analyzing trace with hash -237908360, now seen corresponding path program 298 times [2021-06-05 18:26:27,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:27,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63719482] [2021-06-05 18:26:27,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:28,238 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:28,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:28,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63719482] [2021-06-05 18:26:28,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63719482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:28,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175091280] [2021-06-05 18:26:28,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:28,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:26:28,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:28,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:26:28,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:28,511 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:28,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175091280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:28,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:28,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-05 18:26:28,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224462537] [2021-06-05 18:26:28,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:26:28,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:28,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:26:28,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:26:28,512 INFO L87 Difference]: Start difference. First operand 3463 states and 9528 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:29,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:29,077 INFO L93 Difference]: Finished difference Result 5581 states and 13967 transitions. [2021-06-05 18:26:29,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:26:29,077 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-05 18:26:29,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:29,082 INFO L225 Difference]: With dead ends: 5581 [2021-06-05 18:26:29,082 INFO L226 Difference]: Without dead ends: 5311 [2021-06-05 18:26:29,082 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 666.2ms TimeCoverageRelationStatistics Valid=991, Invalid=2915, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 18:26:29,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5311 states. [2021-06-05 18:26:29,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5311 to 3538. [2021-06-05 18:26:29,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3538 states, 3537 states have (on average 2.757421543681086) internal successors, (9753), 3537 states have internal predecessors, (9753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:29,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 9753 transitions. [2021-06-05 18:26:29,119 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 9753 transitions. Word has length 155 [2021-06-05 18:26:29,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:29,119 INFO L482 AbstractCegarLoop]: Abstraction has 3538 states and 9753 transitions. [2021-06-05 18:26:29,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:29,119 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 9753 transitions. [2021-06-05 18:26:29,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:26:29,122 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:29,122 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:29,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:29,322 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:29,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:29,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1603438440, now seen corresponding path program 299 times [2021-06-05 18:26:29,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:29,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121306780] [2021-06-05 18:26:29,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:29,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:29,615 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:29,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:29,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121306780] [2021-06-05 18:26:29,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121306780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:29,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743752366] [2021-06-05 18:26:29,616 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:29,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 18:26:29,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:29,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:26:29,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:29,869 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:29,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743752366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:29,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:29,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-05 18:26:29,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220697214] [2021-06-05 18:26:29,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:26:29,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:29,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:26:29,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:26:29,870 INFO L87 Difference]: Start difference. First operand 3538 states and 9753 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:30,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:30,513 INFO L93 Difference]: Finished difference Result 5606 states and 14092 transitions. [2021-06-05 18:26:30,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:26:30,513 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-05 18:26:30,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:30,518 INFO L225 Difference]: With dead ends: 5606 [2021-06-05 18:26:30,518 INFO L226 Difference]: Without dead ends: 5336 [2021-06-05 18:26:30,518 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 743.9ms TimeCoverageRelationStatistics Valid=1013, Invalid=3147, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 18:26:30,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5336 states. [2021-06-05 18:26:30,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5336 to 3613. [2021-06-05 18:26:30,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3613 states, 3612 states have (on average 2.762458471760797) internal successors, (9978), 3612 states have internal predecessors, (9978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:30,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 9978 transitions. [2021-06-05 18:26:30,556 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 9978 transitions. Word has length 155 [2021-06-05 18:26:30,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:30,556 INFO L482 AbstractCegarLoop]: Abstraction has 3613 states and 9978 transitions. [2021-06-05 18:26:30,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:30,556 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 9978 transitions. [2021-06-05 18:26:30,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:26:30,559 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:30,559 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:30,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:30,759 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:30,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:30,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1809969674, now seen corresponding path program 300 times [2021-06-05 18:26:30,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:30,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47138725] [2021-06-05 18:26:30,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:30,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:31,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:31,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47138725] [2021-06-05 18:26:31,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47138725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:31,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267654916] [2021-06-05 18:26:31,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:31,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 18:26:31,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:31,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:26:31,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:31,285 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:31,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267654916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:31,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:31,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-05 18:26:31,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473007199] [2021-06-05 18:26:31,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:26:31,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:31,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:26:31,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:26:31,286 INFO L87 Difference]: Start difference. First operand 3613 states and 9978 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:31,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:31,882 INFO L93 Difference]: Finished difference Result 5631 states and 14217 transitions. [2021-06-05 18:26:31,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:26:31,882 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-05 18:26:31,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:31,887 INFO L225 Difference]: With dead ends: 5631 [2021-06-05 18:26:31,887 INFO L226 Difference]: Without dead ends: 5361 [2021-06-05 18:26:31,887 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 672.2ms TimeCoverageRelationStatistics Valid=1021, Invalid=3139, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 18:26:31,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5361 states. [2021-06-05 18:26:31,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5361 to 3688. [2021-06-05 18:26:31,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3688 states, 3687 states have (on average 2.7672904800650935) internal successors, (10203), 3687 states have internal predecessors, (10203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:31,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 10203 transitions. [2021-06-05 18:26:31,924 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 10203 transitions. Word has length 155 [2021-06-05 18:26:31,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:31,924 INFO L482 AbstractCegarLoop]: Abstraction has 3688 states and 10203 transitions. [2021-06-05 18:26:31,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:31,925 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 10203 transitions. [2021-06-05 18:26:31,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:26:31,927 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:31,927 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:32,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2021-06-05 18:26:32,128 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:32,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:32,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1842623206, now seen corresponding path program 301 times [2021-06-05 18:26:32,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:32,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609685204] [2021-06-05 18:26:32,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:32,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:32,409 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:32,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:32,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609685204] [2021-06-05 18:26:32,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609685204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:32,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585743930] [2021-06-05 18:26:32,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:32,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:32,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:26:32,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:32,656 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:32,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585743930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:32,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:32,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-05 18:26:32,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124889755] [2021-06-05 18:26:32,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:26:32,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:32,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:26:32,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:26:32,657 INFO L87 Difference]: Start difference. First operand 3688 states and 10203 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:33,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:33,366 INFO L93 Difference]: Finished difference Result 5656 states and 14342 transitions. [2021-06-05 18:26:33,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 18:26:33,366 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-05 18:26:33,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:33,371 INFO L225 Difference]: With dead ends: 5656 [2021-06-05 18:26:33,371 INFO L226 Difference]: Without dead ends: 5386 [2021-06-05 18:26:33,371 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 781.8ms TimeCoverageRelationStatistics Valid=1045, Invalid=3377, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 18:26:33,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5386 states. [2021-06-05 18:26:33,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5386 to 3763. [2021-06-05 18:26:33,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3763 states, 3762 states have (on average 2.7719298245614037) internal successors, (10428), 3762 states have internal predecessors, (10428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:33,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3763 states to 3763 states and 10428 transitions. [2021-06-05 18:26:33,410 INFO L78 Accepts]: Start accepts. Automaton has 3763 states and 10428 transitions. Word has length 155 [2021-06-05 18:26:33,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:33,411 INFO L482 AbstractCegarLoop]: Abstraction has 3763 states and 10428 transitions. [2021-06-05 18:26:33,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:33,411 INFO L276 IsEmpty]: Start isEmpty. Operand 3763 states and 10428 transitions. [2021-06-05 18:26:33,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:26:33,413 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:33,413 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:33,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2021-06-05 18:26:33,614 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:33,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:33,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1796076276, now seen corresponding path program 302 times [2021-06-05 18:26:33,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:33,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025036819] [2021-06-05 18:26:33,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:33,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:33,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025036819] [2021-06-05 18:26:33,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025036819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:33,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807040562] [2021-06-05 18:26:33,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:33,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:26:33,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:33,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:26:33,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:34,131 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:34,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807040562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:34,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:34,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-05 18:26:34,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265231007] [2021-06-05 18:26:34,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:26:34,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:34,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:26:34,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:26:34,132 INFO L87 Difference]: Start difference. First operand 3763 states and 10428 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:34,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:34,771 INFO L93 Difference]: Finished difference Result 5681 states and 14467 transitions. [2021-06-05 18:26:34,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:26:34,772 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-05 18:26:34,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:34,776 INFO L225 Difference]: With dead ends: 5681 [2021-06-05 18:26:34,776 INFO L226 Difference]: Without dead ends: 5411 [2021-06-05 18:26:34,777 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 727.1ms TimeCoverageRelationStatistics Valid=1067, Invalid=3355, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 18:26:34,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5411 states. [2021-06-05 18:26:34,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5411 to 3838. [2021-06-05 18:26:34,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 2.776387802971071) internal successors, (10653), 3837 states have internal predecessors, (10653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:34,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 10653 transitions. [2021-06-05 18:26:34,815 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 10653 transitions. Word has length 155 [2021-06-05 18:26:34,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:34,815 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 10653 transitions. [2021-06-05 18:26:34,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:34,815 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 10653 transitions. [2021-06-05 18:26:34,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:26:34,818 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:34,818 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:35,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-06-05 18:26:35,018 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:35,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:35,018 INFO L82 PathProgramCache]: Analyzing trace with hash 877691876, now seen corresponding path program 303 times [2021-06-05 18:26:35,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:35,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180691877] [2021-06-05 18:26:35,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:35,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:35,296 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:35,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:35,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180691877] [2021-06-05 18:26:35,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180691877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:35,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756861909] [2021-06-05 18:26:35,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:35,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 18:26:35,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:35,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 18:26:35,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:35,555 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:35,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756861909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:35,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:35,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-05 18:26:35,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444529145] [2021-06-05 18:26:35,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:26:35,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:35,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:26:35,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:26:35,556 INFO L87 Difference]: Start difference. First operand 3838 states and 10653 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:36,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:36,290 INFO L93 Difference]: Finished difference Result 5706 states and 14592 transitions. [2021-06-05 18:26:36,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:26:36,291 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-05 18:26:36,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:36,296 INFO L225 Difference]: With dead ends: 5706 [2021-06-05 18:26:36,296 INFO L226 Difference]: Without dead ends: 5436 [2021-06-05 18:26:36,296 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 810.6ms TimeCoverageRelationStatistics Valid=1072, Invalid=3620, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 18:26:36,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5436 states. [2021-06-05 18:26:36,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5436 to 3913. [2021-06-05 18:26:36,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3913 states, 3912 states have (on average 2.7806748466257667) internal successors, (10878), 3912 states have internal predecessors, (10878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:36,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 10878 transitions. [2021-06-05 18:26:36,349 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 10878 transitions. Word has length 155 [2021-06-05 18:26:36,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:36,349 INFO L482 AbstractCegarLoop]: Abstraction has 3913 states and 10878 transitions. [2021-06-05 18:26:36,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:36,349 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 10878 transitions. [2021-06-05 18:26:36,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:26:36,352 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:36,352 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:36,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2021-06-05 18:26:36,552 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:36,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:36,553 INFO L82 PathProgramCache]: Analyzing trace with hash -898998926, now seen corresponding path program 304 times [2021-06-05 18:26:36,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:36,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292166559] [2021-06-05 18:26:36,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:36,807 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:36,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:36,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292166559] [2021-06-05 18:26:36,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292166559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:36,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022609171] [2021-06-05 18:26:36,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:36,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:26:36,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:36,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:26:36,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:37,045 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:37,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022609171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:37,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:37,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-05 18:26:37,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634078236] [2021-06-05 18:26:37,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:26:37,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:37,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:26:37,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:26:37,046 INFO L87 Difference]: Start difference. First operand 3913 states and 10878 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:37,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:37,730 INFO L93 Difference]: Finished difference Result 5731 states and 14717 transitions. [2021-06-05 18:26:37,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:26:37,730 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-05 18:26:37,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:37,736 INFO L225 Difference]: With dead ends: 5731 [2021-06-05 18:26:37,736 INFO L226 Difference]: Without dead ends: 5461 [2021-06-05 18:26:37,736 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 732.5ms TimeCoverageRelationStatistics Valid=1129, Invalid=3563, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 18:26:37,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5461 states. [2021-06-05 18:26:37,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5461 to 3988. [2021-06-05 18:26:37,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3988 states, 3987 states have (on average 2.7848006019563583) internal successors, (11103), 3987 states have internal predecessors, (11103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:37,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3988 states to 3988 states and 11103 transitions. [2021-06-05 18:26:37,777 INFO L78 Accepts]: Start accepts. Automaton has 3988 states and 11103 transitions. Word has length 155 [2021-06-05 18:26:37,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:37,778 INFO L482 AbstractCegarLoop]: Abstraction has 3988 states and 11103 transitions. [2021-06-05 18:26:37,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:37,778 INFO L276 IsEmpty]: Start isEmpty. Operand 3988 states and 11103 transitions. [2021-06-05 18:26:37,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:26:37,781 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:37,781 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:37,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-06-05 18:26:37,981 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:37,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:37,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1200642658, now seen corresponding path program 305 times [2021-06-05 18:26:37,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:37,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313458549] [2021-06-05 18:26:37,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:37,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:38,256 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:38,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:38,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313458549] [2021-06-05 18:26:38,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313458549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:38,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292571576] [2021-06-05 18:26:38,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:38,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 18:26:38,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:38,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:26:38,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:38,528 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:38,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292571576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:38,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:38,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-05 18:26:38,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113151731] [2021-06-05 18:26:38,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:26:38,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:38,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:26:38,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:26:38,529 INFO L87 Difference]: Start difference. First operand 3988 states and 11103 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:39,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:39,345 INFO L93 Difference]: Finished difference Result 5756 states and 14842 transitions. [2021-06-05 18:26:39,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:26:39,345 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-05 18:26:39,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:39,350 INFO L225 Difference]: With dead ends: 5756 [2021-06-05 18:26:39,350 INFO L226 Difference]: Without dead ends: 5486 [2021-06-05 18:26:39,350 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 871.6ms TimeCoverageRelationStatistics Valid=1157, Invalid=3813, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 18:26:39,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5486 states. [2021-06-05 18:26:39,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5486 to 4063. [2021-06-05 18:26:39,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4063 states, 4062 states have (on average 2.78877400295421) internal successors, (11328), 4062 states have internal predecessors, (11328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:39,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4063 states to 4063 states and 11328 transitions. [2021-06-05 18:26:39,390 INFO L78 Accepts]: Start accepts. Automaton has 4063 states and 11328 transitions. Word has length 155 [2021-06-05 18:26:39,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:39,390 INFO L482 AbstractCegarLoop]: Abstraction has 4063 states and 11328 transitions. [2021-06-05 18:26:39,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:39,390 INFO L276 IsEmpty]: Start isEmpty. Operand 4063 states and 11328 transitions. [2021-06-05 18:26:39,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:26:39,393 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:39,393 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:39,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-06-05 18:26:39,594 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:39,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:39,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1584124560, now seen corresponding path program 306 times [2021-06-05 18:26:39,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:39,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117744772] [2021-06-05 18:26:39,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:39,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:39,856 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:39,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:39,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117744772] [2021-06-05 18:26:39,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117744772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:39,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447583137] [2021-06-05 18:26:39,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:39,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 18:26:39,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:39,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:26:39,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:40,099 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:40,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447583137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:40,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:40,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-05 18:26:40,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471452212] [2021-06-05 18:26:40,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:26:40,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:40,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:26:40,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:26:40,100 INFO L87 Difference]: Start difference. First operand 4063 states and 11328 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:40,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:40,832 INFO L93 Difference]: Finished difference Result 5781 states and 14967 transitions. [2021-06-05 18:26:40,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:26:40,832 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-05 18:26:40,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:40,837 INFO L225 Difference]: With dead ends: 5781 [2021-06-05 18:26:40,837 INFO L226 Difference]: Without dead ends: 5511 [2021-06-05 18:26:40,838 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 770.1ms TimeCoverageRelationStatistics Valid=1207, Invalid=3763, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 18:26:40,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5511 states. [2021-06-05 18:26:40,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5511 to 4138. [2021-06-05 18:26:40,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4138 states, 4137 states have (on average 2.792603335750544) internal successors, (11553), 4137 states have internal predecessors, (11553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:40,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4138 states to 4138 states and 11553 transitions. [2021-06-05 18:26:40,881 INFO L78 Accepts]: Start accepts. Automaton has 4138 states and 11553 transitions. Word has length 155 [2021-06-05 18:26:40,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:40,881 INFO L482 AbstractCegarLoop]: Abstraction has 4138 states and 11553 transitions. [2021-06-05 18:26:40,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:40,881 INFO L276 IsEmpty]: Start isEmpty. Operand 4138 states and 11553 transitions. [2021-06-05 18:26:40,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:26:40,884 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:40,884 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:41,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-06-05 18:26:41,085 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:41,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:41,085 INFO L82 PathProgramCache]: Analyzing trace with hash -944466336, now seen corresponding path program 307 times [2021-06-05 18:26:41,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:41,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347048105] [2021-06-05 18:26:41,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:41,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:41,345 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:41,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:41,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347048105] [2021-06-05 18:26:41,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347048105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:41,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617921564] [2021-06-05 18:26:41,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:41,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:26:41,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:41,593 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:41,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617921564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:41,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:41,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-05 18:26:41,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387597556] [2021-06-05 18:26:41,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:26:41,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:41,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:26:41,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:26:41,594 INFO L87 Difference]: Start difference. First operand 4138 states and 11553 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:42,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:42,501 INFO L93 Difference]: Finished difference Result 5806 states and 15092 transitions. [2021-06-05 18:26:42,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 18:26:42,501 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-05 18:26:42,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:42,507 INFO L225 Difference]: With dead ends: 5806 [2021-06-05 18:26:42,507 INFO L226 Difference]: Without dead ends: 5536 [2021-06-05 18:26:42,507 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 889.3ms TimeCoverageRelationStatistics Valid=1237, Invalid=4019, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 18:26:42,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5536 states. [2021-06-05 18:26:42,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5536 to 4213. [2021-06-05 18:26:42,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4213 states, 4212 states have (on average 2.7962962962962963) internal successors, (11778), 4212 states have internal predecessors, (11778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:42,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4213 states to 4213 states and 11778 transitions. [2021-06-05 18:26:42,553 INFO L78 Accepts]: Start accepts. Automaton has 4213 states and 11778 transitions. Word has length 155 [2021-06-05 18:26:42,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:42,553 INFO L482 AbstractCegarLoop]: Abstraction has 4213 states and 11778 transitions. [2021-06-05 18:26:42,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:42,553 INFO L276 IsEmpty]: Start isEmpty. Operand 4213 states and 11778 transitions. [2021-06-05 18:26:42,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:26:42,556 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:42,556 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:42,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:42,756 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:42,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:42,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1719385362, now seen corresponding path program 308 times [2021-06-05 18:26:42,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:42,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070399144] [2021-06-05 18:26:42,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:42,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:43,002 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:43,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:43,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070399144] [2021-06-05 18:26:43,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070399144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:43,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320919179] [2021-06-05 18:26:43,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:43,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:26:43,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:43,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:26:43,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:43,237 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:43,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320919179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:43,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:43,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-05 18:26:43,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569705121] [2021-06-05 18:26:43,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:26:43,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:43,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:26:43,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:26:43,238 INFO L87 Difference]: Start difference. First operand 4213 states and 11778 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:44,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:44,026 INFO L93 Difference]: Finished difference Result 5831 states and 15217 transitions. [2021-06-05 18:26:44,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 18:26:44,026 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-05 18:26:44,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:44,031 INFO L225 Difference]: With dead ends: 5831 [2021-06-05 18:26:44,031 INFO L226 Difference]: Without dead ends: 5561 [2021-06-05 18:26:44,032 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 781.2ms TimeCoverageRelationStatistics Valid=1301, Invalid=3955, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 18:26:44,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5561 states. [2021-06-05 18:26:44,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5561 to 4288. [2021-06-05 18:26:44,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4288 states, 4287 states have (on average 2.7998600419874036) internal successors, (12003), 4287 states have internal predecessors, (12003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:44,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4288 states to 4288 states and 12003 transitions. [2021-06-05 18:26:44,077 INFO L78 Accepts]: Start accepts. Automaton has 4288 states and 12003 transitions. Word has length 155 [2021-06-05 18:26:44,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:44,077 INFO L482 AbstractCegarLoop]: Abstraction has 4288 states and 12003 transitions. [2021-06-05 18:26:44,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:44,078 INFO L276 IsEmpty]: Start isEmpty. Operand 4288 states and 12003 transitions. [2021-06-05 18:26:44,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:26:44,081 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:44,081 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:44,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-06-05 18:26:44,281 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:44,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:44,281 INFO L82 PathProgramCache]: Analyzing trace with hash 2121668574, now seen corresponding path program 309 times [2021-06-05 18:26:44,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:44,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426546893] [2021-06-05 18:26:44,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:44,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:44,553 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:44,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:44,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426546893] [2021-06-05 18:26:44,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426546893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:44,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311011577] [2021-06-05 18:26:44,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:44,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 18:26:44,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:44,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 18:26:44,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:44,802 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:44,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311011577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:44,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:44,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-05 18:26:44,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329327552] [2021-06-05 18:26:44,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:26:44,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:44,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:26:44,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:26:44,803 INFO L87 Difference]: Start difference. First operand 4288 states and 12003 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:45,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:45,719 INFO L93 Difference]: Finished difference Result 5856 states and 15342 transitions. [2021-06-05 18:26:45,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 18:26:45,719 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-05 18:26:45,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:45,724 INFO L225 Difference]: With dead ends: 5856 [2021-06-05 18:26:45,724 INFO L226 Difference]: Without dead ends: 5586 [2021-06-05 18:26:45,725 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1335 ImplicationChecksByTransitivity, 912.4ms TimeCoverageRelationStatistics Valid=1267, Invalid=4283, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 18:26:45,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5586 states. [2021-06-05 18:26:45,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5586 to 4363. [2021-06-05 18:26:45,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4363 states, 4362 states have (on average 2.8033012379642366) internal successors, (12228), 4362 states have internal predecessors, (12228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:45,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4363 states to 4363 states and 12228 transitions. [2021-06-05 18:26:45,772 INFO L78 Accepts]: Start accepts. Automaton has 4363 states and 12228 transitions. Word has length 155 [2021-06-05 18:26:45,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:45,772 INFO L482 AbstractCegarLoop]: Abstraction has 4363 states and 12228 transitions. [2021-06-05 18:26:45,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:45,772 INFO L276 IsEmpty]: Start isEmpty. Operand 4363 states and 12228 transitions. [2021-06-05 18:26:45,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:26:45,775 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:45,775 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:45,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:45,976 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:45,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:45,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1295286804, now seen corresponding path program 310 times [2021-06-05 18:26:45,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:45,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278900589] [2021-06-05 18:26:45,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:45,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:46,218 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:46,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:46,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278900589] [2021-06-05 18:26:46,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278900589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:46,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800446774] [2021-06-05 18:26:46,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:46,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:26:46,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:46,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:26:46,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:46,457 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:46,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800446774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:46,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:46,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-05 18:26:46,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070039730] [2021-06-05 18:26:46,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:26:46,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:46,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:26:46,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:26:46,458 INFO L87 Difference]: Start difference. First operand 4363 states and 12228 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:47,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:47,255 INFO L93 Difference]: Finished difference Result 5881 states and 15467 transitions. [2021-06-05 18:26:47,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 18:26:47,256 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-05 18:26:47,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:47,260 INFO L225 Difference]: With dead ends: 5881 [2021-06-05 18:26:47,260 INFO L226 Difference]: Without dead ends: 5611 [2021-06-05 18:26:47,260 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1454 ImplicationChecksByTransitivity, 818.7ms TimeCoverageRelationStatistics Valid=1411, Invalid=4139, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 18:26:47,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5611 states. [2021-06-05 18:26:47,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5611 to 4438. [2021-06-05 18:26:47,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4438 states, 4437 states have (on average 2.8066260987153484) internal successors, (12453), 4437 states have internal predecessors, (12453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:47,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4438 states to 4438 states and 12453 transitions. [2021-06-05 18:26:47,305 INFO L78 Accepts]: Start accepts. Automaton has 4438 states and 12453 transitions. Word has length 155 [2021-06-05 18:26:47,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:47,305 INFO L482 AbstractCegarLoop]: Abstraction has 4438 states and 12453 transitions. [2021-06-05 18:26:47,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:47,305 INFO L276 IsEmpty]: Start isEmpty. Operand 4438 states and 12453 transitions. [2021-06-05 18:26:47,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:26:47,308 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:47,308 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:47,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable318 [2021-06-05 18:26:47,509 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:47,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:47,509 INFO L82 PathProgramCache]: Analyzing trace with hash 2099625692, now seen corresponding path program 311 times [2021-06-05 18:26:47,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:47,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183021833] [2021-06-05 18:26:47,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:47,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:47,750 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:47,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:47,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183021833] [2021-06-05 18:26:47,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183021833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:47,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905826543] [2021-06-05 18:26:47,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:47,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 18:26:47,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:47,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:26:47,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:47,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905826543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:47,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:47,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-05 18:26:47,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123591090] [2021-06-05 18:26:47,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:26:47,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:47,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:26:47,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:26:47,997 INFO L87 Difference]: Start difference. First operand 4438 states and 12453 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:49,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:49,054 INFO L93 Difference]: Finished difference Result 5906 states and 15592 transitions. [2021-06-05 18:26:49,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 18:26:49,055 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-05 18:26:49,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:49,060 INFO L225 Difference]: With dead ends: 5906 [2021-06-05 18:26:49,060 INFO L226 Difference]: Without dead ends: 5636 [2021-06-05 18:26:49,061 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1492 ImplicationChecksByTransitivity, 987.5ms TimeCoverageRelationStatistics Valid=1445, Invalid=4407, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 18:26:49,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5636 states. [2021-06-05 18:26:49,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5636 to 4513. [2021-06-05 18:26:49,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4513 states, 4512 states have (on average 2.809840425531915) internal successors, (12678), 4512 states have internal predecessors, (12678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:49,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4513 states to 4513 states and 12678 transitions. [2021-06-05 18:26:49,106 INFO L78 Accepts]: Start accepts. Automaton has 4513 states and 12678 transitions. Word has length 155 [2021-06-05 18:26:49,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:49,107 INFO L482 AbstractCegarLoop]: Abstraction has 4513 states and 12678 transitions. [2021-06-05 18:26:49,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:49,107 INFO L276 IsEmpty]: Start isEmpty. Operand 4513 states and 12678 transitions. [2021-06-05 18:26:49,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:26:49,110 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:49,110 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:49,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:49,310 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:49,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:49,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1670561386, now seen corresponding path program 312 times [2021-06-05 18:26:49,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:49,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517114340] [2021-06-05 18:26:49,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:49,553 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:49,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:49,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517114340] [2021-06-05 18:26:49,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517114340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:49,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905037991] [2021-06-05 18:26:49,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:49,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 18:26:49,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:49,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:26:49,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:49,826 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:49,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905037991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:49,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:49,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-05 18:26:49,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77218663] [2021-06-05 18:26:49,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:26:49,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:49,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:26:49,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:26:49,827 INFO L87 Difference]: Start difference. First operand 4513 states and 12678 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:50,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:50,683 INFO L93 Difference]: Finished difference Result 5931 states and 15717 transitions. [2021-06-05 18:26:50,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 18:26:50,683 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-05 18:26:50,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:50,688 INFO L225 Difference]: With dead ends: 5931 [2021-06-05 18:26:50,688 INFO L226 Difference]: Without dead ends: 5661 [2021-06-05 18:26:50,689 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 833.6ms TimeCoverageRelationStatistics Valid=1537, Invalid=4315, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 18:26:50,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5661 states. [2021-06-05 18:26:50,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5661 to 4588. [2021-06-05 18:26:50,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4588 states, 4587 states have (on average 2.8129496402877696) internal successors, (12903), 4587 states have internal predecessors, (12903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:50,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4588 states to 4588 states and 12903 transitions. [2021-06-05 18:26:50,736 INFO L78 Accepts]: Start accepts. Automaton has 4588 states and 12903 transitions. Word has length 155 [2021-06-05 18:26:50,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:50,736 INFO L482 AbstractCegarLoop]: Abstraction has 4588 states and 12903 transitions. [2021-06-05 18:26:50,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:50,736 INFO L276 IsEmpty]: Start isEmpty. Operand 4588 states and 12903 transitions. [2021-06-05 18:26:50,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:26:50,740 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:50,740 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:50,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable320,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:50,940 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:50,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:50,941 INFO L82 PathProgramCache]: Analyzing trace with hash 984378202, now seen corresponding path program 313 times [2021-06-05 18:26:50,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:50,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742199888] [2021-06-05 18:26:50,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:50,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:51,183 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:51,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:51,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742199888] [2021-06-05 18:26:51,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742199888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:51,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026562566] [2021-06-05 18:26:51,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:51,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:51,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:26:51,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:51,420 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:51,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026562566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:51,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:51,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-05 18:26:51,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524991015] [2021-06-05 18:26:51,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:26:51,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:51,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:26:51,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:26:51,421 INFO L87 Difference]: Start difference. First operand 4588 states and 12903 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:52,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:52,486 INFO L93 Difference]: Finished difference Result 5956 states and 15842 transitions. [2021-06-05 18:26:52,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 18:26:52,486 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-05 18:26:52,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:52,492 INFO L225 Difference]: With dead ends: 5956 [2021-06-05 18:26:52,492 INFO L226 Difference]: Without dead ends: 5686 [2021-06-05 18:26:52,492 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 1048.4ms TimeCoverageRelationStatistics Valid=1573, Invalid=4589, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 18:26:52,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2021-06-05 18:26:52,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 4663. [2021-06-05 18:26:52,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4663 states, 4662 states have (on average 2.815958815958816) internal successors, (13128), 4662 states have internal predecessors, (13128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:52,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 13128 transitions. [2021-06-05 18:26:52,553 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 13128 transitions. Word has length 155 [2021-06-05 18:26:52,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:52,553 INFO L482 AbstractCegarLoop]: Abstraction has 4663 states and 13128 transitions. [2021-06-05 18:26:52,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:52,554 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 13128 transitions. [2021-06-05 18:26:52,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:26:52,557 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:52,557 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:52,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-06-05 18:26:52,757 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:52,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:52,758 INFO L82 PathProgramCache]: Analyzing trace with hash 899343464, now seen corresponding path program 314 times [2021-06-05 18:26:52,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:52,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911117518] [2021-06-05 18:26:52,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:52,991 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:52,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:52,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911117518] [2021-06-05 18:26:52,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911117518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:52,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799314445] [2021-06-05 18:26:52,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:53,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:26:53,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:53,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:26:53,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:53,212 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:53,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799314445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:53,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:53,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-05 18:26:53,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186532931] [2021-06-05 18:26:53,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:26:53,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:53,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:26:53,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:26:53,213 INFO L87 Difference]: Start difference. First operand 4663 states and 13128 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:54,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:54,103 INFO L93 Difference]: Finished difference Result 5981 states and 15967 transitions. [2021-06-05 18:26:54,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 18:26:54,103 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-05 18:26:54,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:54,109 INFO L225 Difference]: With dead ends: 5981 [2021-06-05 18:26:54,109 INFO L226 Difference]: Without dead ends: 5711 [2021-06-05 18:26:54,109 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 861.1ms TimeCoverageRelationStatistics Valid=1679, Invalid=4483, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 18:26:54,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5711 states. [2021-06-05 18:26:54,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5711 to 4738. [2021-06-05 18:26:54,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4738 states, 4737 states have (on average 2.818872704243192) internal successors, (13353), 4737 states have internal predecessors, (13353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:54,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4738 states to 4738 states and 13353 transitions. [2021-06-05 18:26:54,159 INFO L78 Accepts]: Start accepts. Automaton has 4738 states and 13353 transitions. Word has length 155 [2021-06-05 18:26:54,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:54,159 INFO L482 AbstractCegarLoop]: Abstraction has 4738 states and 13353 transitions. [2021-06-05 18:26:54,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:54,160 INFO L276 IsEmpty]: Start isEmpty. Operand 4738 states and 13353 transitions. [2021-06-05 18:26:54,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:26:54,163 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:54,163 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:54,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-06-05 18:26:54,363 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:54,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:54,363 INFO L82 PathProgramCache]: Analyzing trace with hash 831192408, now seen corresponding path program 315 times [2021-06-05 18:26:54,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:54,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17021144] [2021-06-05 18:26:54,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:54,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:54,606 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:54,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:54,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17021144] [2021-06-05 18:26:54,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17021144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:54,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636237167] [2021-06-05 18:26:54,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:54,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 18:26:54,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:54,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:26:54,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:54,874 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:54,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636237167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:54,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:54,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-05 18:26:54,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128508028] [2021-06-05 18:26:54,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:26:54,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:54,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:26:54,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:26:54,875 INFO L87 Difference]: Start difference. First operand 4738 states and 13353 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:55,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:55,927 INFO L93 Difference]: Finished difference Result 6006 states and 16092 transitions. [2021-06-05 18:26:55,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 18:26:55,927 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-05 18:26:55,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:55,932 INFO L225 Difference]: With dead ends: 6006 [2021-06-05 18:26:55,932 INFO L226 Difference]: Without dead ends: 5736 [2021-06-05 18:26:55,933 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1674 ImplicationChecksByTransitivity, 1027.4ms TimeCoverageRelationStatistics Valid=1579, Invalid=4901, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 18:26:55,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5736 states. [2021-06-05 18:26:55,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5736 to 4813. [2021-06-05 18:26:55,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4813 states, 4812 states have (on average 2.821695760598504) internal successors, (13578), 4812 states have internal predecessors, (13578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:55,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4813 states to 4813 states and 13578 transitions. [2021-06-05 18:26:55,981 INFO L78 Accepts]: Start accepts. Automaton has 4813 states and 13578 transitions. Word has length 155 [2021-06-05 18:26:55,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:55,981 INFO L482 AbstractCegarLoop]: Abstraction has 4813 states and 13578 transitions. [2021-06-05 18:26:55,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:55,982 INFO L276 IsEmpty]: Start isEmpty. Operand 4813 states and 13578 transitions. [2021-06-05 18:26:55,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:26:55,985 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:55,985 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:56,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-06-05 18:26:56,185 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:56,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:56,185 INFO L82 PathProgramCache]: Analyzing trace with hash -465776666, now seen corresponding path program 316 times [2021-06-05 18:26:56,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:56,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937607240] [2021-06-05 18:26:56,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:56,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:56,422 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:56,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:56,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937607240] [2021-06-05 18:26:56,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937607240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:56,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372645247] [2021-06-05 18:26:56,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:56,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:26:56,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:56,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:26:56,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:56,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372645247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:56,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:56,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-05 18:26:56,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196332059] [2021-06-05 18:26:56,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:26:56,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:56,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:26:56,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:26:56,639 INFO L87 Difference]: Start difference. First operand 4813 states and 13578 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:57,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:57,538 INFO L93 Difference]: Finished difference Result 6031 states and 16217 transitions. [2021-06-05 18:26:57,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 18:26:57,539 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-05 18:26:57,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:57,544 INFO L225 Difference]: With dead ends: 6031 [2021-06-05 18:26:57,544 INFO L226 Difference]: Without dead ends: 5761 [2021-06-05 18:26:57,545 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 889.6ms TimeCoverageRelationStatistics Valid=1837, Invalid=4643, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 18:26:57,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5761 states. [2021-06-05 18:26:57,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5761 to 4888. [2021-06-05 18:26:57,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4888 states, 4887 states have (on average 2.824432166973603) internal successors, (13803), 4887 states have internal predecessors, (13803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:57,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4888 states to 4888 states and 13803 transitions. [2021-06-05 18:26:57,596 INFO L78 Accepts]: Start accepts. Automaton has 4888 states and 13803 transitions. Word has length 155 [2021-06-05 18:26:57,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:57,596 INFO L482 AbstractCegarLoop]: Abstraction has 4888 states and 13803 transitions. [2021-06-05 18:26:57,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:57,596 INFO L276 IsEmpty]: Start isEmpty. Operand 4888 states and 13803 transitions. [2021-06-05 18:26:57,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:26:57,600 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:57,600 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:57,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-06-05 18:26:57,800 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:57,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:57,800 INFO L82 PathProgramCache]: Analyzing trace with hash -36023082, now seen corresponding path program 317 times [2021-06-05 18:26:57,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:57,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490463046] [2021-06-05 18:26:57,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:57,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:58,065 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:58,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:58,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490463046] [2021-06-05 18:26:58,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490463046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:58,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010739770] [2021-06-05 18:26:58,066 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:58,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 18:26:58,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:58,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:26:58,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:58,310 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:58,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010739770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:58,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:58,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-05 18:26:58,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013151648] [2021-06-05 18:26:58,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:26:58,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:58,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:26:58,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:26:58,311 INFO L87 Difference]: Start difference. First operand 4888 states and 13803 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:59,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:59,432 INFO L93 Difference]: Finished difference Result 6116 states and 16507 transitions. [2021-06-05 18:26:59,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 18:26:59,433 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-05 18:26:59,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:59,438 INFO L225 Difference]: With dead ends: 6116 [2021-06-05 18:26:59,438 INFO L226 Difference]: Without dead ends: 5846 [2021-06-05 18:26:59,439 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1876 ImplicationChecksByTransitivity, 1102.0ms TimeCoverageRelationStatistics Valid=1877, Invalid=4929, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 18:26:59,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5846 states. [2021-06-05 18:26:59,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5846 to 4963. [2021-06-05 18:26:59,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4963 states, 4962 states have (on average 2.8311164852881903) internal successors, (14048), 4962 states have internal predecessors, (14048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:59,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4963 states to 4963 states and 14048 transitions. [2021-06-05 18:26:59,488 INFO L78 Accepts]: Start accepts. Automaton has 4963 states and 14048 transitions. Word has length 155 [2021-06-05 18:26:59,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:59,489 INFO L482 AbstractCegarLoop]: Abstraction has 4963 states and 14048 transitions. [2021-06-05 18:26:59,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:59,489 INFO L276 IsEmpty]: Start isEmpty. Operand 4963 states and 14048 transitions. [2021-06-05 18:26:59,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:26:59,492 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:59,492 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:26:59,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:59,692 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:59,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:59,693 INFO L82 PathProgramCache]: Analyzing trace with hash -93757212, now seen corresponding path program 318 times [2021-06-05 18:26:59,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:59,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083986809] [2021-06-05 18:26:59,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:59,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:59,933 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:59,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:59,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083986809] [2021-06-05 18:26:59,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083986809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:59,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384071438] [2021-06-05 18:26:59,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:00,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 18:27:00,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:00,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:27:00,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:00,159 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:00,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384071438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:00,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:00,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-05 18:27:00,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254347462] [2021-06-05 18:27:00,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:27:00,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:00,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:27:00,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:27:00,160 INFO L87 Difference]: Start difference. First operand 4963 states and 14048 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:01,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:01,107 INFO L93 Difference]: Finished difference Result 6858 states and 18631 transitions. [2021-06-05 18:27:01,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 18:27:01,108 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-05 18:27:01,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:01,113 INFO L225 Difference]: With dead ends: 6858 [2021-06-05 18:27:01,113 INFO L226 Difference]: Without dead ends: 6588 [2021-06-05 18:27:01,114 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1961 ImplicationChecksByTransitivity, 933.8ms TimeCoverageRelationStatistics Valid=2012, Invalid=4794, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 18:27:01,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6588 states. [2021-06-05 18:27:01,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6588 to 5143. [2021-06-05 18:27:01,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5143 states, 5142 states have (on average 2.8407234539089847) internal successors, (14607), 5142 states have internal predecessors, (14607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:01,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5143 states to 5143 states and 14607 transitions. [2021-06-05 18:27:01,164 INFO L78 Accepts]: Start accepts. Automaton has 5143 states and 14607 transitions. Word has length 155 [2021-06-05 18:27:01,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:01,164 INFO L482 AbstractCegarLoop]: Abstraction has 5143 states and 14607 transitions. [2021-06-05 18:27:01,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:01,164 INFO L276 IsEmpty]: Start isEmpty. Operand 5143 states and 14607 transitions. [2021-06-05 18:27:01,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:27:01,168 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:01,168 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:01,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-05 18:27:01,368 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:01,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:01,368 INFO L82 PathProgramCache]: Analyzing trace with hash -71413962, now seen corresponding path program 319 times [2021-06-05 18:27:01,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:01,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537912679] [2021-06-05 18:27:01,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:01,621 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:01,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:01,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537912679] [2021-06-05 18:27:01,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537912679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:01,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824440125] [2021-06-05 18:27:01,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:01,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:01,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:27:01,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:01,852 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:01,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824440125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:01,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:01,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-05 18:27:01,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538786749] [2021-06-05 18:27:01,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:27:01,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:01,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:27:01,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:27:01,853 INFO L87 Difference]: Start difference. First operand 5143 states and 14607 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:03,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:03,012 INFO L93 Difference]: Finished difference Result 6320 states and 17281 transitions. [2021-06-05 18:27:03,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 18:27:03,012 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-05 18:27:03,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:03,017 INFO L225 Difference]: With dead ends: 6320 [2021-06-05 18:27:03,017 INFO L226 Difference]: Without dead ends: 5831 [2021-06-05 18:27:03,018 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2012 ImplicationChecksByTransitivity, 1124.2ms TimeCoverageRelationStatistics Valid=2056, Invalid=5084, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 18:27:03,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5831 states. [2021-06-05 18:27:03,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5831 to 3234. [2021-06-05 18:27:03,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3234 states, 3233 states have (on average 2.74234457160532) internal successors, (8866), 3233 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:03,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3234 states to 3234 states and 8866 transitions. [2021-06-05 18:27:03,054 INFO L78 Accepts]: Start accepts. Automaton has 3234 states and 8866 transitions. Word has length 155 [2021-06-05 18:27:03,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:03,054 INFO L482 AbstractCegarLoop]: Abstraction has 3234 states and 8866 transitions. [2021-06-05 18:27:03,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:03,054 INFO L276 IsEmpty]: Start isEmpty. Operand 3234 states and 8866 transitions. [2021-06-05 18:27:03,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:27:03,056 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:03,056 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:03,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:03,256 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:03,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:03,257 INFO L82 PathProgramCache]: Analyzing trace with hash -842046282, now seen corresponding path program 320 times [2021-06-05 18:27:03,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:03,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127988481] [2021-06-05 18:27:03,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:03,627 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:03,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:03,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127988481] [2021-06-05 18:27:03,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127988481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:03,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687264674] [2021-06-05 18:27:03,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:03,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:27:03,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:03,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:27:03,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:03,936 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:03,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687264674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:03,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:03,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 34 [2021-06-05 18:27:03,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449727668] [2021-06-05 18:27:03,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:27:03,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:03,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:27:03,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=870, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:27:03,937 INFO L87 Difference]: Start difference. First operand 3234 states and 8866 transitions. Second operand has 34 states, 34 states have (on average 5.529411764705882) internal successors, (188), 34 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:04,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:04,551 INFO L93 Difference]: Finished difference Result 4524 states and 11766 transitions. [2021-06-05 18:27:04,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:27:04,551 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.529411764705882) internal successors, (188), 34 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-05 18:27:04,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:04,555 INFO L225 Difference]: With dead ends: 4524 [2021-06-05 18:27:04,556 INFO L226 Difference]: Without dead ends: 4190 [2021-06-05 18:27:04,556 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 815.9ms TimeCoverageRelationStatistics Valid=1165, Invalid=3125, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 18:27:04,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4190 states. [2021-06-05 18:27:04,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4190 to 3319. [2021-06-05 18:27:04,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3319 states, 3318 states have (on average 2.7233273056057867) internal successors, (9036), 3318 states have internal predecessors, (9036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:04,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3319 states to 3319 states and 9036 transitions. [2021-06-05 18:27:04,587 INFO L78 Accepts]: Start accepts. Automaton has 3319 states and 9036 transitions. Word has length 160 [2021-06-05 18:27:04,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:04,587 INFO L482 AbstractCegarLoop]: Abstraction has 3319 states and 9036 transitions. [2021-06-05 18:27:04,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.529411764705882) internal successors, (188), 34 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:04,587 INFO L276 IsEmpty]: Start isEmpty. Operand 3319 states and 9036 transitions. [2021-06-05 18:27:04,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:27:04,590 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:04,590 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:04,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable328 [2021-06-05 18:27:04,790 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:04,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:04,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1096521818, now seen corresponding path program 321 times [2021-06-05 18:27:04,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:04,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570719300] [2021-06-05 18:27:04,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:04,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:05,101 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:05,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:05,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570719300] [2021-06-05 18:27:05,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570719300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:05,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692377037] [2021-06-05 18:27:05,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:05,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 18:27:05,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:05,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:27:05,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:05,359 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:05,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692377037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:05,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:05,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-05 18:27:05,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797996638] [2021-06-05 18:27:05,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:27:05,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:05,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:27:05,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:27:05,360 INFO L87 Difference]: Start difference. First operand 3319 states and 9036 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:05,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:05,875 INFO L93 Difference]: Finished difference Result 5746 states and 14147 transitions. [2021-06-05 18:27:05,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:27:05,876 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-05 18:27:05,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:05,880 INFO L225 Difference]: With dead ends: 5746 [2021-06-05 18:27:05,880 INFO L226 Difference]: Without dead ends: 5476 [2021-06-05 18:27:05,881 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 659.7ms TimeCoverageRelationStatistics Valid=988, Invalid=2552, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 18:27:05,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5476 states. [2021-06-05 18:27:05,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5476 to 3463. [2021-06-05 18:27:05,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3463 states, 3462 states have (on average 2.7305025996533794) internal successors, (9453), 3462 states have internal predecessors, (9453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:05,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3463 states to 3463 states and 9453 transitions. [2021-06-05 18:27:05,929 INFO L78 Accepts]: Start accepts. Automaton has 3463 states and 9453 transitions. Word has length 160 [2021-06-05 18:27:05,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:05,929 INFO L482 AbstractCegarLoop]: Abstraction has 3463 states and 9453 transitions. [2021-06-05 18:27:05,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:05,929 INFO L276 IsEmpty]: Start isEmpty. Operand 3463 states and 9453 transitions. [2021-06-05 18:27:05,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:27:05,932 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:05,932 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:06,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:06,132 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:06,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:06,132 INFO L82 PathProgramCache]: Analyzing trace with hash 251033930, now seen corresponding path program 322 times [2021-06-05 18:27:06,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:06,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194511654] [2021-06-05 18:27:06,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:06,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:06,461 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:06,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:06,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194511654] [2021-06-05 18:27:06,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194511654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:06,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825019854] [2021-06-05 18:27:06,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:06,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:27:06,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:06,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:27:06,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:06,720 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:06,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825019854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:06,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:06,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-05 18:27:06,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700931427] [2021-06-05 18:27:06,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:27:06,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:06,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:27:06,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=785, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:27:06,721 INFO L87 Difference]: Start difference. First operand 3463 states and 9453 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:07,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:07,316 INFO L93 Difference]: Finished difference Result 5706 states and 14142 transitions. [2021-06-05 18:27:07,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:27:07,316 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-05 18:27:07,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:07,321 INFO L225 Difference]: With dead ends: 5706 [2021-06-05 18:27:07,321 INFO L226 Difference]: Without dead ends: 5436 [2021-06-05 18:27:07,321 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 751.3ms TimeCoverageRelationStatistics Valid=1067, Invalid=2965, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 18:27:07,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5436 states. [2021-06-05 18:27:07,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5436 to 3538. [2021-06-05 18:27:07,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3538 states, 3537 states have (on average 2.736217133163698) internal successors, (9678), 3537 states have internal predecessors, (9678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:07,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 9678 transitions. [2021-06-05 18:27:07,359 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 9678 transitions. Word has length 160 [2021-06-05 18:27:07,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:07,359 INFO L482 AbstractCegarLoop]: Abstraction has 3538 states and 9678 transitions. [2021-06-05 18:27:07,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:07,359 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 9678 transitions. [2021-06-05 18:27:07,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:27:07,362 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:07,362 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:07,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2021-06-05 18:27:07,562 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:07,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:07,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1654969128, now seen corresponding path program 323 times [2021-06-05 18:27:07,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:07,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443354559] [2021-06-05 18:27:07,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:07,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:07,863 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:07,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:07,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443354559] [2021-06-05 18:27:07,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443354559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:07,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053768598] [2021-06-05 18:27:07,863 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:07,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 18:27:07,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:07,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:27:07,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:08,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053768598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:08,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:08,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-05 18:27:08,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680413802] [2021-06-05 18:27:08,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:27:08,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:08,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:27:08,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:27:08,107 INFO L87 Difference]: Start difference. First operand 3538 states and 9678 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:08,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:08,675 INFO L93 Difference]: Finished difference Result 5756 states and 14317 transitions. [2021-06-05 18:27:08,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:27:08,675 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-05 18:27:08,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:08,679 INFO L225 Difference]: With dead ends: 5756 [2021-06-05 18:27:08,679 INFO L226 Difference]: Without dead ends: 5486 [2021-06-05 18:27:08,680 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 688.7ms TimeCoverageRelationStatistics Valid=987, Invalid=2795, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 18:27:08,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5486 states. [2021-06-05 18:27:08,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5486 to 3613. [2021-06-05 18:27:08,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3613 states, 3612 states have (on average 2.7416943521594686) internal successors, (9903), 3612 states have internal predecessors, (9903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:08,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 9903 transitions. [2021-06-05 18:27:08,715 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 9903 transitions. Word has length 160 [2021-06-05 18:27:08,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:08,716 INFO L482 AbstractCegarLoop]: Abstraction has 3613 states and 9903 transitions. [2021-06-05 18:27:08,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:08,716 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 9903 transitions. [2021-06-05 18:27:08,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:27:08,718 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:08,718 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:08,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-06-05 18:27:08,919 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:08,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:08,919 INFO L82 PathProgramCache]: Analyzing trace with hash -771917368, now seen corresponding path program 324 times [2021-06-05 18:27:08,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:08,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983279441] [2021-06-05 18:27:08,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:08,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:09,243 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:09,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:09,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983279441] [2021-06-05 18:27:09,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983279441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:09,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435606483] [2021-06-05 18:27:09,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:09,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 18:27:09,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:09,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:27:09,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:09,516 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:09,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435606483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:09,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:09,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-05 18:27:09,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147713321] [2021-06-05 18:27:09,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:27:09,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:09,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:27:09,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:27:09,517 INFO L87 Difference]: Start difference. First operand 3613 states and 9903 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:10,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:10,206 INFO L93 Difference]: Finished difference Result 5781 states and 14442 transitions. [2021-06-05 18:27:10,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:27:10,207 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-05 18:27:10,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:10,212 INFO L225 Difference]: With dead ends: 5781 [2021-06-05 18:27:10,212 INFO L226 Difference]: Without dead ends: 5511 [2021-06-05 18:27:10,212 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 800.0ms TimeCoverageRelationStatistics Valid=1074, Invalid=3216, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 18:27:10,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5511 states. [2021-06-05 18:27:10,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5511 to 3688. [2021-06-05 18:27:10,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3688 states, 3687 states have (on average 2.7469487388120424) internal successors, (10128), 3687 states have internal predecessors, (10128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:10,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 10128 transitions. [2021-06-05 18:27:10,252 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 10128 transitions. Word has length 160 [2021-06-05 18:27:10,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:10,252 INFO L482 AbstractCegarLoop]: Abstraction has 3688 states and 10128 transitions. [2021-06-05 18:27:10,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:10,252 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 10128 transitions. [2021-06-05 18:27:10,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:27:10,255 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:10,255 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:10,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable332,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:10,455 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:10,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:10,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1630840534, now seen corresponding path program 325 times [2021-06-05 18:27:10,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:10,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784594102] [2021-06-05 18:27:10,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:10,747 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:10,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:10,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784594102] [2021-06-05 18:27:10,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784594102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:10,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937301357] [2021-06-05 18:27:10,747 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:10,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:10,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:27:10,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:10,988 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:10,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937301357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:10,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:10,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-05 18:27:10,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340617645] [2021-06-05 18:27:10,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:27:10,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:10,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:27:10,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:27:10,989 INFO L87 Difference]: Start difference. First operand 3688 states and 10128 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:11,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:11,620 INFO L93 Difference]: Finished difference Result 5806 states and 14567 transitions. [2021-06-05 18:27:11,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:27:11,620 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-05 18:27:11,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:11,625 INFO L225 Difference]: With dead ends: 5806 [2021-06-05 18:27:11,625 INFO L226 Difference]: Without dead ends: 5536 [2021-06-05 18:27:11,625 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 713.4ms TimeCoverageRelationStatistics Valid=1002, Invalid=3030, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 18:27:11,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5536 states. [2021-06-05 18:27:11,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5536 to 3763. [2021-06-05 18:27:11,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3763 states, 3762 states have (on average 2.751993620414673) internal successors, (10353), 3762 states have internal predecessors, (10353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:11,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3763 states to 3763 states and 10353 transitions. [2021-06-05 18:27:11,663 INFO L78 Accepts]: Start accepts. Automaton has 3763 states and 10353 transitions. Word has length 160 [2021-06-05 18:27:11,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:11,663 INFO L482 AbstractCegarLoop]: Abstraction has 3763 states and 10353 transitions. [2021-06-05 18:27:11,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:11,663 INFO L276 IsEmpty]: Start isEmpty. Operand 3763 states and 10353 transitions. [2021-06-05 18:27:11,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:27:11,666 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:11,666 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:11,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-05 18:27:11,866 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:11,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:11,867 INFO L82 PathProgramCache]: Analyzing trace with hash -822779962, now seen corresponding path program 326 times [2021-06-05 18:27:11,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:11,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863828982] [2021-06-05 18:27:11,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:11,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:12,165 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:12,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:12,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863828982] [2021-06-05 18:27:12,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863828982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:12,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691574691] [2021-06-05 18:27:12,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:12,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:27:12,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:12,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:27:12,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:12,429 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:12,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691574691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:12,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:12,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-05 18:27:12,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868144360] [2021-06-05 18:27:12,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:27:12,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:12,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:27:12,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:27:12,430 INFO L87 Difference]: Start difference. First operand 3763 states and 10353 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:13,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:13,163 INFO L93 Difference]: Finished difference Result 5831 states and 14692 transitions. [2021-06-05 18:27:13,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 18:27:13,164 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-05 18:27:13,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:13,169 INFO L225 Difference]: With dead ends: 5831 [2021-06-05 18:27:13,169 INFO L226 Difference]: Without dead ends: 5561 [2021-06-05 18:27:13,169 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 809.2ms TimeCoverageRelationStatistics Valid=1097, Invalid=3459, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 18:27:13,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5561 states. [2021-06-05 18:27:13,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5561 to 3838. [2021-06-05 18:27:13,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 2.7568412822517594) internal successors, (10578), 3837 states have internal predecessors, (10578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:13,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 10578 transitions. [2021-06-05 18:27:13,208 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 10578 transitions. Word has length 160 [2021-06-05 18:27:13,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:13,208 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 10578 transitions. [2021-06-05 18:27:13,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:13,209 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 10578 transitions. [2021-06-05 18:27:13,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:27:13,211 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:13,211 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:13,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-05 18:27:13,412 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:13,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:13,412 INFO L82 PathProgramCache]: Analyzing trace with hash 58779220, now seen corresponding path program 327 times [2021-06-05 18:27:13,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:13,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358181461] [2021-06-05 18:27:13,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:13,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:13,694 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:13,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:13,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358181461] [2021-06-05 18:27:13,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358181461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:13,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237576401] [2021-06-05 18:27:13,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:13,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 18:27:13,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:13,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 18:27:13,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:13,970 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:13,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237576401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:13,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:13,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-05 18:27:13,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506855603] [2021-06-05 18:27:13,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:27:13,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:13,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:27:13,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:27:13,971 INFO L87 Difference]: Start difference. First operand 3838 states and 10578 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:14,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:14,649 INFO L93 Difference]: Finished difference Result 5856 states and 14817 transitions. [2021-06-05 18:27:14,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:27:14,649 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-05 18:27:14,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:14,655 INFO L225 Difference]: With dead ends: 5856 [2021-06-05 18:27:14,655 INFO L226 Difference]: Without dead ends: 5586 [2021-06-05 18:27:14,655 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 737.7ms TimeCoverageRelationStatistics Valid=1033, Invalid=3257, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 18:27:14,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5586 states. [2021-06-05 18:27:14,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5586 to 3913. [2021-06-05 18:27:14,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3913 states, 3912 states have (on average 2.7615030674846626) internal successors, (10803), 3912 states have internal predecessors, (10803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:14,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 10803 transitions. [2021-06-05 18:27:14,696 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 10803 transitions. Word has length 160 [2021-06-05 18:27:14,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:14,696 INFO L482 AbstractCegarLoop]: Abstraction has 3913 states and 10803 transitions. [2021-06-05 18:27:14,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:14,696 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 10803 transitions. [2021-06-05 18:27:14,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:27:14,699 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:14,699 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:14,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-06-05 18:27:14,900 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:14,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:14,900 INFO L82 PathProgramCache]: Analyzing trace with hash -583595196, now seen corresponding path program 328 times [2021-06-05 18:27:14,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:14,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340716571] [2021-06-05 18:27:14,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:14,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:15,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:15,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340716571] [2021-06-05 18:27:15,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340716571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:15,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579739369] [2021-06-05 18:27:15,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:15,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:27:15,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:15,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:27:15,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:15,452 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:15,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579739369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:15,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:15,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-05 18:27:15,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134863266] [2021-06-05 18:27:15,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:27:15,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:15,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:27:15,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:27:15,453 INFO L87 Difference]: Start difference. First operand 3913 states and 10803 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:16,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:16,246 INFO L93 Difference]: Finished difference Result 5881 states and 14942 transitions. [2021-06-05 18:27:16,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:27:16,246 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-05 18:27:16,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:16,252 INFO L225 Difference]: With dead ends: 5881 [2021-06-05 18:27:16,252 INFO L226 Difference]: Without dead ends: 5611 [2021-06-05 18:27:16,252 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 856.3ms TimeCoverageRelationStatistics Valid=1136, Invalid=3694, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 18:27:16,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5611 states. [2021-06-05 18:27:16,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5611 to 3988. [2021-06-05 18:27:16,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3988 states, 3987 states have (on average 2.7659894657637323) internal successors, (11028), 3987 states have internal predecessors, (11028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:16,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3988 states to 3988 states and 11028 transitions. [2021-06-05 18:27:16,294 INFO L78 Accepts]: Start accepts. Automaton has 3988 states and 11028 transitions. Word has length 160 [2021-06-05 18:27:16,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:16,294 INFO L482 AbstractCegarLoop]: Abstraction has 3988 states and 11028 transitions. [2021-06-05 18:27:16,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:16,295 INFO L276 IsEmpty]: Start isEmpty. Operand 3988 states and 11028 transitions. [2021-06-05 18:27:16,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:27:16,297 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:16,298 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:16,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2021-06-05 18:27:16,498 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:16,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:16,498 INFO L82 PathProgramCache]: Analyzing trace with hash -630142126, now seen corresponding path program 329 times [2021-06-05 18:27:16,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:16,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768788083] [2021-06-05 18:27:16,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:16,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:16,797 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:16,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:16,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768788083] [2021-06-05 18:27:16,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768788083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:16,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551721764] [2021-06-05 18:27:16,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:16,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 18:27:16,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:16,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:27:16,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:17,043 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:17,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551721764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:17,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:17,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-05 18:27:17,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451064140] [2021-06-05 18:27:17,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:27:17,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:17,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:27:17,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:27:17,044 INFO L87 Difference]: Start difference. First operand 3988 states and 11028 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:17,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:17,772 INFO L93 Difference]: Finished difference Result 5906 states and 15067 transitions. [2021-06-05 18:27:17,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:27:17,773 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-05 18:27:17,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:17,778 INFO L225 Difference]: With dead ends: 5906 [2021-06-05 18:27:17,778 INFO L226 Difference]: Without dead ends: 5636 [2021-06-05 18:27:17,778 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 781.6ms TimeCoverageRelationStatistics Valid=1080, Invalid=3476, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 18:27:17,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5636 states. [2021-06-05 18:27:17,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5636 to 4063. [2021-06-05 18:27:17,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4063 states, 4062 states have (on average 2.7703101920236337) internal successors, (11253), 4062 states have internal predecessors, (11253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:17,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4063 states to 4063 states and 11253 transitions. [2021-06-05 18:27:17,823 INFO L78 Accepts]: Start accepts. Automaton has 4063 states and 11253 transitions. Word has length 160 [2021-06-05 18:27:17,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:17,823 INFO L482 AbstractCegarLoop]: Abstraction has 4063 states and 11253 transitions. [2021-06-05 18:27:17,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:17,823 INFO L276 IsEmpty]: Start isEmpty. Operand 4063 states and 11253 transitions. [2021-06-05 18:27:17,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:27:17,826 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:17,826 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:18,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-06-05 18:27:18,026 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:18,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:18,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1548526526, now seen corresponding path program 330 times [2021-06-05 18:27:18,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:18,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592612353] [2021-06-05 18:27:18,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:18,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:18,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592612353] [2021-06-05 18:27:18,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592612353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:18,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359197780] [2021-06-05 18:27:18,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:18,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 18:27:18,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:18,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:27:18,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:18,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359197780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:18,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:18,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-05 18:27:18,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677299224] [2021-06-05 18:27:18,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:27:18,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:18,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:27:18,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:27:18,595 INFO L87 Difference]: Start difference. First operand 4063 states and 11253 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:19,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:19,547 INFO L93 Difference]: Finished difference Result 5931 states and 15192 transitions. [2021-06-05 18:27:19,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:27:19,547 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-05 18:27:19,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:19,552 INFO L225 Difference]: With dead ends: 5931 [2021-06-05 18:27:19,552 INFO L226 Difference]: Without dead ends: 5661 [2021-06-05 18:27:19,553 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 953.5ms TimeCoverageRelationStatistics Valid=1191, Invalid=3921, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 18:27:19,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5661 states. [2021-06-05 18:27:19,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5661 to 4138. [2021-06-05 18:27:19,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4138 states, 4137 states have (on average 2.774474256707759) internal successors, (11478), 4137 states have internal predecessors, (11478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:19,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4138 states to 4138 states and 11478 transitions. [2021-06-05 18:27:19,595 INFO L78 Accepts]: Start accepts. Automaton has 4138 states and 11478 transitions. Word has length 160 [2021-06-05 18:27:19,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:19,596 INFO L482 AbstractCegarLoop]: Abstraction has 4138 states and 11478 transitions. [2021-06-05 18:27:19,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:19,596 INFO L276 IsEmpty]: Start isEmpty. Operand 4138 states and 11478 transitions. [2021-06-05 18:27:19,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:27:19,599 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:19,599 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:19,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:19,799 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:19,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:19,799 INFO L82 PathProgramCache]: Analyzing trace with hash 969749968, now seen corresponding path program 331 times [2021-06-05 18:27:19,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:19,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743472287] [2021-06-05 18:27:19,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:19,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:20,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:20,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743472287] [2021-06-05 18:27:20,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743472287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:20,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568778907] [2021-06-05 18:27:20,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:20,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:20,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:27:20,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:20,302 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:20,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568778907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:20,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:20,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-05 18:27:20,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621993546] [2021-06-05 18:27:20,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:27:20,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:20,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:27:20,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:27:20,303 INFO L87 Difference]: Start difference. First operand 4138 states and 11478 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:21,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:21,045 INFO L93 Difference]: Finished difference Result 5956 states and 15317 transitions. [2021-06-05 18:27:21,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:27:21,045 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-05 18:27:21,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:21,050 INFO L225 Difference]: With dead ends: 5956 [2021-06-05 18:27:21,050 INFO L226 Difference]: Without dead ends: 5686 [2021-06-05 18:27:21,051 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 780.7ms TimeCoverageRelationStatistics Valid=1143, Invalid=3687, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 18:27:21,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2021-06-05 18:27:21,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 4213. [2021-06-05 18:27:21,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4213 states, 4212 states have (on average 2.7784900284900287) internal successors, (11703), 4212 states have internal predecessors, (11703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:21,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4213 states to 4213 states and 11703 transitions. [2021-06-05 18:27:21,093 INFO L78 Accepts]: Start accepts. Automaton has 4213 states and 11703 transitions. Word has length 160 [2021-06-05 18:27:21,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:21,093 INFO L482 AbstractCegarLoop]: Abstraction has 4213 states and 11703 transitions. [2021-06-05 18:27:21,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:21,094 INFO L276 IsEmpty]: Start isEmpty. Operand 4213 states and 11703 transitions. [2021-06-05 18:27:21,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:27:21,097 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:21,097 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:21,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:21,306 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:21,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:21,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1225575744, now seen corresponding path program 332 times [2021-06-05 18:27:21,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:21,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275132724] [2021-06-05 18:27:21,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:21,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:21,584 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:21,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:21,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275132724] [2021-06-05 18:27:21,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275132724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:21,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353546241] [2021-06-05 18:27:21,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:21,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:27:21,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:21,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:27:21,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:21,841 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:21,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353546241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:21,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:21,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-05 18:27:21,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117855449] [2021-06-05 18:27:21,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:27:21,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:21,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:27:21,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:27:21,842 INFO L87 Difference]: Start difference. First operand 4213 states and 11703 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:22,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:22,778 INFO L93 Difference]: Finished difference Result 5981 states and 15442 transitions. [2021-06-05 18:27:22,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 18:27:22,779 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-05 18:27:22,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:22,784 INFO L225 Difference]: With dead ends: 5981 [2021-06-05 18:27:22,784 INFO L226 Difference]: Without dead ends: 5711 [2021-06-05 18:27:22,784 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 951.1ms TimeCoverageRelationStatistics Valid=1262, Invalid=4140, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 18:27:22,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5711 states. [2021-06-05 18:27:22,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5711 to 4288. [2021-06-05 18:27:22,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4288 states, 4287 states have (on average 2.782365290412876) internal successors, (11928), 4287 states have internal predecessors, (11928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:22,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4288 states to 4288 states and 11928 transitions. [2021-06-05 18:27:22,831 INFO L78 Accepts]: Start accepts. Automaton has 4288 states and 11928 transitions. Word has length 160 [2021-06-05 18:27:22,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:22,831 INFO L482 AbstractCegarLoop]: Abstraction has 4288 states and 11928 transitions. [2021-06-05 18:27:22,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:22,831 INFO L276 IsEmpty]: Start isEmpty. Operand 4288 states and 11928 transitions. [2021-06-05 18:27:22,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:27:22,834 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:22,834 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:23,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:23,034 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:23,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:23,035 INFO L82 PathProgramCache]: Analyzing trace with hash 284624334, now seen corresponding path program 333 times [2021-06-05 18:27:23,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:23,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045478315] [2021-06-05 18:27:23,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:23,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:23,303 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:23,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:23,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045478315] [2021-06-05 18:27:23,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045478315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:23,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420237682] [2021-06-05 18:27:23,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:23,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 18:27:23,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:23,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 18:27:23,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:23,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420237682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:23,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:23,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-05 18:27:23,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167329498] [2021-06-05 18:27:23,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:27:23,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:23,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:27:23,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:27:23,545 INFO L87 Difference]: Start difference. First operand 4288 states and 11928 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:24,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:24,369 INFO L93 Difference]: Finished difference Result 6006 states and 15567 transitions. [2021-06-05 18:27:24,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:27:24,369 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-05 18:27:24,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:24,375 INFO L225 Difference]: With dead ends: 6006 [2021-06-05 18:27:24,375 INFO L226 Difference]: Without dead ends: 5736 [2021-06-05 18:27:24,376 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 826.9ms TimeCoverageRelationStatistics Valid=1222, Invalid=3890, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 18:27:24,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5736 states. [2021-06-05 18:27:24,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5736 to 4363. [2021-06-05 18:27:24,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4363 states, 4362 states have (on average 2.7861072902338377) internal successors, (12153), 4362 states have internal predecessors, (12153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:24,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4363 states to 4363 states and 12153 transitions. [2021-06-05 18:27:24,425 INFO L78 Accepts]: Start accepts. Automaton has 4363 states and 12153 transitions. Word has length 160 [2021-06-05 18:27:24,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:24,425 INFO L482 AbstractCegarLoop]: Abstraction has 4363 states and 12153 transitions. [2021-06-05 18:27:24,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:24,425 INFO L276 IsEmpty]: Start isEmpty. Operand 4363 states and 12153 transitions. [2021-06-05 18:27:24,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:27:24,428 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:24,428 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:24,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:24,629 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:24,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:24,629 INFO L82 PathProgramCache]: Analyzing trace with hash 924282558, now seen corresponding path program 334 times [2021-06-05 18:27:24,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:24,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794834591] [2021-06-05 18:27:24,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:24,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:24,924 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:24,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:24,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794834591] [2021-06-05 18:27:24,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794834591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:24,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25289427] [2021-06-05 18:27:24,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:24,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:27:24,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:24,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:27:24,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:25,182 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:25,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25289427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:25,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:25,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-05 18:27:25,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756215902] [2021-06-05 18:27:25,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:27:25,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:25,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:27:25,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:27:25,183 INFO L87 Difference]: Start difference. First operand 4363 states and 12153 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:26,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:26,145 INFO L93 Difference]: Finished difference Result 6031 states and 15692 transitions. [2021-06-05 18:27:26,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 18:27:26,146 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-05 18:27:26,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:26,151 INFO L225 Difference]: With dead ends: 6031 [2021-06-05 18:27:26,151 INFO L226 Difference]: Without dead ends: 5761 [2021-06-05 18:27:26,152 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 1002.1ms TimeCoverageRelationStatistics Valid=1349, Invalid=4351, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 18:27:26,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5761 states. [2021-06-05 18:27:26,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5761 to 4438. [2021-06-05 18:27:26,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4438 states, 4437 states have (on average 2.7897227856659907) internal successors, (12378), 4437 states have internal predecessors, (12378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:26,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4438 states to 4438 states and 12378 transitions. [2021-06-05 18:27:26,197 INFO L78 Accepts]: Start accepts. Automaton has 4438 states and 12378 transitions. Word has length 160 [2021-06-05 18:27:26,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:26,197 INFO L482 AbstractCegarLoop]: Abstraction has 4438 states and 12378 transitions. [2021-06-05 18:27:26,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:26,197 INFO L276 IsEmpty]: Start isEmpty. Operand 4438 states and 12378 transitions. [2021-06-05 18:27:26,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:27:26,200 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:26,200 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:26,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-06-05 18:27:26,401 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:26,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:26,401 INFO L82 PathProgramCache]: Analyzing trace with hash 149363532, now seen corresponding path program 335 times [2021-06-05 18:27:26,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:26,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722922100] [2021-06-05 18:27:26,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:26,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:26,657 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:26,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:26,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722922100] [2021-06-05 18:27:26,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722922100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:26,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529706426] [2021-06-05 18:27:26,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:26,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 18:27:26,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:26,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:27:26,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:26,888 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:26,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529706426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:26,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:26,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-05 18:27:26,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762561614] [2021-06-05 18:27:26,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:27:26,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:26,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:27:26,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:27:26,889 INFO L87 Difference]: Start difference. First operand 4438 states and 12378 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:27,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:27,732 INFO L93 Difference]: Finished difference Result 6056 states and 15817 transitions. [2021-06-05 18:27:27,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 18:27:27,732 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-05 18:27:27,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:27,737 INFO L225 Difference]: With dead ends: 6056 [2021-06-05 18:27:27,737 INFO L226 Difference]: Without dead ends: 5786 [2021-06-05 18:27:27,738 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 842.8ms TimeCoverageRelationStatistics Valid=1317, Invalid=4085, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 18:27:27,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5786 states. [2021-06-05 18:27:27,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5786 to 4513. [2021-06-05 18:27:27,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4513 states, 4512 states have (on average 2.793218085106383) internal successors, (12603), 4512 states have internal predecessors, (12603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:27,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4513 states to 4513 states and 12603 transitions. [2021-06-05 18:27:27,783 INFO L78 Accepts]: Start accepts. Automaton has 4513 states and 12603 transitions. Word has length 160 [2021-06-05 18:27:27,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:27,783 INFO L482 AbstractCegarLoop]: Abstraction has 4513 states and 12603 transitions. [2021-06-05 18:27:27,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:27,783 INFO L276 IsEmpty]: Start isEmpty. Operand 4513 states and 12603 transitions. [2021-06-05 18:27:27,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:27:27,786 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:27,786 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:27,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-06-05 18:27:27,987 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:27,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:27,987 INFO L82 PathProgramCache]: Analyzing trace with hash -304549828, now seen corresponding path program 336 times [2021-06-05 18:27:27,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:27,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394381098] [2021-06-05 18:27:27,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:28,273 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:28,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:28,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394381098] [2021-06-05 18:27:28,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394381098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:28,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191385296] [2021-06-05 18:27:28,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:28,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 18:27:28,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:28,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 18:27:28,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:28,533 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:28,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191385296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:28,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:28,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-05 18:27:28,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648138576] [2021-06-05 18:27:28,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:27:28,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:28,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:27:28,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:27:28,534 INFO L87 Difference]: Start difference. First operand 4513 states and 12603 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:29,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:29,506 INFO L93 Difference]: Finished difference Result 6081 states and 15942 transitions. [2021-06-05 18:27:29,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 18:27:29,506 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-05 18:27:29,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:29,512 INFO L225 Difference]: With dead ends: 6081 [2021-06-05 18:27:29,512 INFO L226 Difference]: Without dead ends: 5811 [2021-06-05 18:27:29,512 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1303 ImplicationChecksByTransitivity, 983.0ms TimeCoverageRelationStatistics Valid=1280, Invalid=4420, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 18:27:29,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5811 states. [2021-06-05 18:27:29,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5811 to 4588. [2021-06-05 18:27:29,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4588 states, 4587 states have (on average 2.7965990843688684) internal successors, (12828), 4587 states have internal predecessors, (12828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:29,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4588 states to 4588 states and 12828 transitions. [2021-06-05 18:27:29,561 INFO L78 Accepts]: Start accepts. Automaton has 4588 states and 12828 transitions. Word has length 160 [2021-06-05 18:27:29,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:29,561 INFO L482 AbstractCegarLoop]: Abstraction has 4588 states and 12828 transitions. [2021-06-05 18:27:29,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:29,561 INFO L276 IsEmpty]: Start isEmpty. Operand 4588 states and 12828 transitions. [2021-06-05 18:27:29,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:27:29,564 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:29,564 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:29,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-05 18:27:29,765 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:29,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:29,765 INFO L82 PathProgramCache]: Analyzing trace with hash 573462090, now seen corresponding path program 337 times [2021-06-05 18:27:29,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:29,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321240556] [2021-06-05 18:27:29,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:29,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:30,039 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:30,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:30,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321240556] [2021-06-05 18:27:30,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321240556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:30,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860243645] [2021-06-05 18:27:30,039 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:30,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:27:30,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:30,266 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:30,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860243645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:30,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:30,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-05 18:27:30,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653077368] [2021-06-05 18:27:30,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:27:30,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:30,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:27:30,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:27:30,267 INFO L87 Difference]: Start difference. First operand 4588 states and 12828 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:31,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:31,134 INFO L93 Difference]: Finished difference Result 6106 states and 16067 transitions. [2021-06-05 18:27:31,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 18:27:31,134 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-05 18:27:31,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:31,139 INFO L225 Difference]: With dead ends: 6106 [2021-06-05 18:27:31,140 INFO L226 Difference]: Without dead ends: 5836 [2021-06-05 18:27:31,140 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 875.7ms TimeCoverageRelationStatistics Valid=1428, Invalid=4272, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 18:27:31,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5836 states. [2021-06-05 18:27:31,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5836 to 4663. [2021-06-05 18:27:31,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4663 states, 4662 states have (on average 2.7998712998713) internal successors, (13053), 4662 states have internal predecessors, (13053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:31,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 13053 transitions. [2021-06-05 18:27:31,186 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 13053 transitions. Word has length 160 [2021-06-05 18:27:31,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:31,186 INFO L482 AbstractCegarLoop]: Abstraction has 4663 states and 13053 transitions. [2021-06-05 18:27:31,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:31,186 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 13053 transitions. [2021-06-05 18:27:31,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:27:31,189 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:31,189 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:31,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-06-05 18:27:31,390 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:31,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:31,390 INFO L82 PathProgramCache]: Analyzing trace with hash -326592710, now seen corresponding path program 338 times [2021-06-05 18:27:31,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:31,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627101478] [2021-06-05 18:27:31,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:31,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:31,662 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:31,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:31,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627101478] [2021-06-05 18:27:31,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627101478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:31,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843529735] [2021-06-05 18:27:31,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:31,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:27:31,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:31,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:27:31,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:31,901 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:31,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843529735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:31,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:31,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-05 18:27:31,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872358400] [2021-06-05 18:27:31,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:27:31,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:31,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:27:31,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:27:31,902 INFO L87 Difference]: Start difference. First operand 4663 states and 13053 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:32,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:32,969 INFO L93 Difference]: Finished difference Result 6131 states and 16192 transitions. [2021-06-05 18:27:32,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 18:27:32,969 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-05 18:27:32,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:32,974 INFO L225 Difference]: With dead ends: 6131 [2021-06-05 18:27:32,974 INFO L226 Difference]: Without dead ends: 5861 [2021-06-05 18:27:32,974 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 1067.4ms TimeCoverageRelationStatistics Valid=1571, Invalid=4749, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 18:27:32,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5861 states. [2021-06-05 18:27:33,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5861 to 4738. [2021-06-05 18:27:33,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4738 states, 4737 states have (on average 2.803039898670044) internal successors, (13278), 4737 states have internal predecessors, (13278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:33,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4738 states to 4738 states and 13278 transitions. [2021-06-05 18:27:33,022 INFO L78 Accepts]: Start accepts. Automaton has 4738 states and 13278 transitions. Word has length 160 [2021-06-05 18:27:33,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:33,022 INFO L482 AbstractCegarLoop]: Abstraction has 4738 states and 13278 transitions. [2021-06-05 18:27:33,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:33,022 INFO L276 IsEmpty]: Start isEmpty. Operand 4738 states and 13278 transitions. [2021-06-05 18:27:33,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:27:33,025 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:33,025 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:33,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:33,226 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:33,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:33,226 INFO L82 PathProgramCache]: Analyzing trace with hash -755657016, now seen corresponding path program 339 times [2021-06-05 18:27:33,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:33,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558631789] [2021-06-05 18:27:33,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:33,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:33,504 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:33,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:33,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558631789] [2021-06-05 18:27:33,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558631789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:33,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246174091] [2021-06-05 18:27:33,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:33,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 18:27:33,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:33,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 18:27:33,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:33,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246174091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:33,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:33,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-05 18:27:33,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389106415] [2021-06-05 18:27:33,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:27:33,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:33,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:27:33,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:27:33,739 INFO L87 Difference]: Start difference. First operand 4738 states and 13278 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:34,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:34,736 INFO L93 Difference]: Finished difference Result 6156 states and 16317 transitions. [2021-06-05 18:27:34,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 18:27:34,736 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-05 18:27:34,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:34,741 INFO L225 Difference]: With dead ends: 6156 [2021-06-05 18:27:34,741 INFO L226 Difference]: Without dead ends: 5886 [2021-06-05 18:27:34,742 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 948.3ms TimeCoverageRelationStatistics Valid=1555, Invalid=4451, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 18:27:34,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5886 states. [2021-06-05 18:27:34,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5886 to 4813. [2021-06-05 18:27:34,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4813 states, 4812 states have (on average 2.8061097256857854) internal successors, (13503), 4812 states have internal predecessors, (13503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:34,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4813 states to 4813 states and 13503 transitions. [2021-06-05 18:27:34,793 INFO L78 Accepts]: Start accepts. Automaton has 4813 states and 13503 transitions. Word has length 160 [2021-06-05 18:27:34,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:34,793 INFO L482 AbstractCegarLoop]: Abstraction has 4813 states and 13503 transitions. [2021-06-05 18:27:34,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:34,793 INFO L276 IsEmpty]: Start isEmpty. Operand 4813 states and 13503 transitions. [2021-06-05 18:27:34,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:27:34,796 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:34,796 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:34,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-06-05 18:27:34,997 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:34,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:34,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1441840200, now seen corresponding path program 340 times [2021-06-05 18:27:34,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:34,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942646779] [2021-06-05 18:27:34,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:35,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:35,248 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:35,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:35,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942646779] [2021-06-05 18:27:35,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942646779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:35,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701197674] [2021-06-05 18:27:35,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:35,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:27:35,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:35,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:27:35,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:35,515 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:35,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701197674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:35,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:35,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-05 18:27:35,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971962148] [2021-06-05 18:27:35,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:27:35,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:35,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:27:35,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:27:35,516 INFO L87 Difference]: Start difference. First operand 4813 states and 13503 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:36,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:36,665 INFO L93 Difference]: Finished difference Result 6181 states and 16442 transitions. [2021-06-05 18:27:36,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 18:27:36,666 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-05 18:27:36,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:36,671 INFO L225 Difference]: With dead ends: 6181 [2021-06-05 18:27:36,671 INFO L226 Difference]: Without dead ends: 5911 [2021-06-05 18:27:36,671 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 1105.9ms TimeCoverageRelationStatistics Valid=1706, Invalid=4936, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 18:27:36,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5911 states. [2021-06-05 18:27:36,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5911 to 4888. [2021-06-05 18:27:36,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4888 states, 4887 states have (on average 2.809085328422345) internal successors, (13728), 4887 states have internal predecessors, (13728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:36,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4888 states to 4888 states and 13728 transitions. [2021-06-05 18:27:36,722 INFO L78 Accepts]: Start accepts. Automaton has 4888 states and 13728 transitions. Word has length 160 [2021-06-05 18:27:36,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:36,722 INFO L482 AbstractCegarLoop]: Abstraction has 4888 states and 13728 transitions. [2021-06-05 18:27:36,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:36,722 INFO L276 IsEmpty]: Start isEmpty. Operand 4888 states and 13728 transitions. [2021-06-05 18:27:36,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:27:36,726 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:36,726 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:36,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:36,926 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:36,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:36,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1526874938, now seen corresponding path program 341 times [2021-06-05 18:27:36,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:36,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276753300] [2021-06-05 18:27:36,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:37,180 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:37,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:37,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276753300] [2021-06-05 18:27:37,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276753300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:37,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406671424] [2021-06-05 18:27:37,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:37,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 18:27:37,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:37,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:27:37,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:37,412 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:37,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406671424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:37,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:37,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-05 18:27:37,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936330851] [2021-06-05 18:27:37,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:27:37,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:37,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:27:37,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:27:37,413 INFO L87 Difference]: Start difference. First operand 4888 states and 13728 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:38,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:38,495 INFO L93 Difference]: Finished difference Result 6206 states and 16567 transitions. [2021-06-05 18:27:38,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 18:27:38,495 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-05 18:27:38,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:38,500 INFO L225 Difference]: With dead ends: 6206 [2021-06-05 18:27:38,500 INFO L226 Difference]: Without dead ends: 5936 [2021-06-05 18:27:38,500 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 975.1ms TimeCoverageRelationStatistics Valid=1698, Invalid=4622, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 18:27:38,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5936 states. [2021-06-05 18:27:38,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5936 to 4963. [2021-06-05 18:27:38,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4963 states, 4962 states have (on average 2.811970979443773) internal successors, (13953), 4962 states have internal predecessors, (13953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:38,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4963 states to 4963 states and 13953 transitions. [2021-06-05 18:27:38,551 INFO L78 Accepts]: Start accepts. Automaton has 4963 states and 13953 transitions. Word has length 160 [2021-06-05 18:27:38,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:38,551 INFO L482 AbstractCegarLoop]: Abstraction has 4963 states and 13953 transitions. [2021-06-05 18:27:38,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:38,551 INFO L276 IsEmpty]: Start isEmpty. Operand 4963 states and 13953 transitions. [2021-06-05 18:27:38,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:27:38,555 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:38,555 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:38,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-06-05 18:27:38,755 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:38,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:38,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1595025994, now seen corresponding path program 342 times [2021-06-05 18:27:38,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:38,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369335292] [2021-06-05 18:27:38,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:38,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:39,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:39,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369335292] [2021-06-05 18:27:39,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369335292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:39,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039253833] [2021-06-05 18:27:39,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:39,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 18:27:39,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:39,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:27:39,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:39,273 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:39,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039253833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:39,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:39,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-05 18:27:39,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291540448] [2021-06-05 18:27:39,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:27:39,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:39,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:27:39,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:27:39,274 INFO L87 Difference]: Start difference. First operand 4963 states and 13953 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:40,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:40,428 INFO L93 Difference]: Finished difference Result 6231 states and 16692 transitions. [2021-06-05 18:27:40,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 18:27:40,428 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-05 18:27:40,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:40,433 INFO L225 Difference]: With dead ends: 6231 [2021-06-05 18:27:40,433 INFO L226 Difference]: Without dead ends: 5961 [2021-06-05 18:27:40,434 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1633 ImplicationChecksByTransitivity, 1087.1ms TimeCoverageRelationStatistics Valid=1595, Invalid=5047, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 18:27:40,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5961 states. [2021-06-05 18:27:40,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5961 to 5038. [2021-06-05 18:27:40,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5038 states, 5037 states have (on average 2.8147706968433592) internal successors, (14178), 5037 states have internal predecessors, (14178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:40,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5038 states to 5038 states and 14178 transitions. [2021-06-05 18:27:40,487 INFO L78 Accepts]: Start accepts. Automaton has 5038 states and 14178 transitions. Word has length 160 [2021-06-05 18:27:40,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:40,488 INFO L482 AbstractCegarLoop]: Abstraction has 5038 states and 14178 transitions. [2021-06-05 18:27:40,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:40,488 INFO L276 IsEmpty]: Start isEmpty. Operand 5038 states and 14178 transitions. [2021-06-05 18:27:40,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:27:40,491 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:40,491 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:40,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:40,692 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:40,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:40,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1402972228, now seen corresponding path program 343 times [2021-06-05 18:27:40,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:40,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683930181] [2021-06-05 18:27:40,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:40,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:40,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:40,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683930181] [2021-06-05 18:27:40,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683930181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:40,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150999268] [2021-06-05 18:27:40,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:41,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:41,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:27:41,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:41,183 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:41,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150999268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:41,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:41,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-05 18:27:41,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343169247] [2021-06-05 18:27:41,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:27:41,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:41,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:27:41,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:27:41,184 INFO L87 Difference]: Start difference. First operand 5038 states and 14178 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:42,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:42,188 INFO L93 Difference]: Finished difference Result 6256 states and 16817 transitions. [2021-06-05 18:27:42,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 18:27:42,188 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-05 18:27:42,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:42,194 INFO L225 Difference]: With dead ends: 6256 [2021-06-05 18:27:42,194 INFO L226 Difference]: Without dead ends: 5986 [2021-06-05 18:27:42,195 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1746 ImplicationChecksByTransitivity, 951.1ms TimeCoverageRelationStatistics Valid=1857, Invalid=4785, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 18:27:42,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5986 states. [2021-06-05 18:27:42,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5986 to 5113. [2021-06-05 18:27:42,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5113 states, 5112 states have (on average 2.817488262910798) internal successors, (14403), 5112 states have internal predecessors, (14403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:42,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5113 states to 5113 states and 14403 transitions. [2021-06-05 18:27:42,249 INFO L78 Accepts]: Start accepts. Automaton has 5113 states and 14403 transitions. Word has length 160 [2021-06-05 18:27:42,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:42,249 INFO L482 AbstractCegarLoop]: Abstraction has 5113 states and 14403 transitions. [2021-06-05 18:27:42,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:42,250 INFO L276 IsEmpty]: Start isEmpty. Operand 5113 states and 14403 transitions. [2021-06-05 18:27:42,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:27:42,253 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:42,253 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:42,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:42,454 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:42,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:42,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1832725812, now seen corresponding path program 344 times [2021-06-05 18:27:42,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:42,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461700282] [2021-06-05 18:27:42,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:42,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:42,725 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:42,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:42,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461700282] [2021-06-05 18:27:42,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461700282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:42,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533591764] [2021-06-05 18:27:42,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:42,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:27:42,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:42,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:27:42,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:42,962 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:42,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533591764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:42,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:42,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-05 18:27:42,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437952272] [2021-06-05 18:27:42,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:27:42,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:42,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:27:42,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:27:42,963 INFO L87 Difference]: Start difference. First operand 5113 states and 14403 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:44,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:44,269 INFO L93 Difference]: Finished difference Result 6341 states and 17107 transitions. [2021-06-05 18:27:44,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 18:27:44,269 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-05 18:27:44,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:44,274 INFO L225 Difference]: With dead ends: 6341 [2021-06-05 18:27:44,274 INFO L226 Difference]: Without dead ends: 6071 [2021-06-05 18:27:44,275 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1918 ImplicationChecksByTransitivity, 1230.8ms TimeCoverageRelationStatistics Valid=2024, Invalid=5286, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 18:27:44,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6071 states. [2021-06-05 18:27:44,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6071 to 5188. [2021-06-05 18:27:44,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5188 states, 5187 states have (on average 2.82398303450935) internal successors, (14648), 5187 states have internal predecessors, (14648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:44,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5188 states to 5188 states and 14648 transitions. [2021-06-05 18:27:44,330 INFO L78 Accepts]: Start accepts. Automaton has 5188 states and 14648 transitions. Word has length 160 [2021-06-05 18:27:44,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:44,330 INFO L482 AbstractCegarLoop]: Abstraction has 5188 states and 14648 transitions. [2021-06-05 18:27:44,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:44,330 INFO L276 IsEmpty]: Start isEmpty. Operand 5188 states and 14648 transitions. [2021-06-05 18:27:44,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:27:44,333 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:44,333 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:44,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:44,534 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:44,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:44,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1774991682, now seen corresponding path program 345 times [2021-06-05 18:27:44,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:44,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950967321] [2021-06-05 18:27:44,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:44,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:44,786 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:44,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:44,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950967321] [2021-06-05 18:27:44,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950967321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:44,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113367188] [2021-06-05 18:27:44,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:44,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 18:27:44,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:44,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:27:44,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:45,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113367188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:45,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:45,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-05 18:27:45,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347710919] [2021-06-05 18:27:45,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:27:45,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:45,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:27:45,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:27:45,021 INFO L87 Difference]: Start difference. First operand 5188 states and 14648 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:46,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:46,052 INFO L93 Difference]: Finished difference Result 7108 states and 19281 transitions. [2021-06-05 18:27:46,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 18:27:46,052 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-05 18:27:46,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:46,057 INFO L225 Difference]: With dead ends: 7108 [2021-06-05 18:27:46,057 INFO L226 Difference]: Without dead ends: 6838 [2021-06-05 18:27:46,058 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1871 ImplicationChecksByTransitivity, 998.0ms TimeCoverageRelationStatistics Valid=2033, Invalid=4939, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 18:27:46,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6838 states. [2021-06-05 18:27:46,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6838 to 5368. [2021-06-05 18:27:46,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5368 states, 5367 states have (on average 2.8334264952487422) internal successors, (15207), 5367 states have internal predecessors, (15207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:46,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5368 states to 5368 states and 15207 transitions. [2021-06-05 18:27:46,110 INFO L78 Accepts]: Start accepts. Automaton has 5368 states and 15207 transitions. Word has length 160 [2021-06-05 18:27:46,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:46,110 INFO L482 AbstractCegarLoop]: Abstraction has 5368 states and 15207 transitions. [2021-06-05 18:27:46,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:46,111 INFO L276 IsEmpty]: Start isEmpty. Operand 5368 states and 15207 transitions. [2021-06-05 18:27:46,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:27:46,114 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:46,114 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:46,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-06-05 18:27:46,315 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:46,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:46,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1797334932, now seen corresponding path program 346 times [2021-06-05 18:27:46,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:46,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202217840] [2021-06-05 18:27:46,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:46,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:46,571 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:46,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:46,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202217840] [2021-06-05 18:27:46,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202217840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:46,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865201560] [2021-06-05 18:27:46,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:46,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:27:46,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:46,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:27:46,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:46,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865201560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:46,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:46,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-05 18:27:46,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413348346] [2021-06-05 18:27:46,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:27:46,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:46,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:27:46,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:27:46,810 INFO L87 Difference]: Start difference. First operand 5368 states and 15207 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:48,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:48,124 INFO L93 Difference]: Finished difference Result 6595 states and 17981 transitions. [2021-06-05 18:27:48,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 18:27:48,125 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-05 18:27:48,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:48,130 INFO L225 Difference]: With dead ends: 6595 [2021-06-05 18:27:48,130 INFO L226 Difference]: Without dead ends: 6106 [2021-06-05 18:27:48,131 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2051 ImplicationChecksByTransitivity, 1234.4ms TimeCoverageRelationStatistics Valid=2210, Invalid=5446, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 18:27:48,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6106 states. [2021-06-05 18:27:48,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6106 to 3513. [2021-06-05 18:27:48,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3513 states, 3512 states have (on average 2.7414578587699316) internal successors, (9628), 3512 states have internal predecessors, (9628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:48,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 9628 transitions. [2021-06-05 18:27:48,170 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 9628 transitions. Word has length 160 [2021-06-05 18:27:48,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:48,170 INFO L482 AbstractCegarLoop]: Abstraction has 3513 states and 9628 transitions. [2021-06-05 18:27:48,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:48,171 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 9628 transitions. [2021-06-05 18:27:48,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:27:48,173 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:48,173 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:48,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-06-05 18:27:48,374 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:48,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:48,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1274170069, now seen corresponding path program 347 times [2021-06-05 18:27:48,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:48,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887846576] [2021-06-05 18:27:48,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:48,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:48,737 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:48,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:48,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887846576] [2021-06-05 18:27:48,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887846576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:48,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968297262] [2021-06-05 18:27:48,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:48,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 18:27:48,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:48,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:27:48,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:48,988 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:48,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968297262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:48,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:48,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-05 18:27:48,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901745678] [2021-06-05 18:27:48,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:27:48,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:48,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:27:48,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:27:48,989 INFO L87 Difference]: Start difference. First operand 3513 states and 9628 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:49,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:49,580 INFO L93 Difference]: Finished difference Result 5231 states and 13267 transitions. [2021-06-05 18:27:49,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:27:49,580 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-05 18:27:49,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:49,584 INFO L225 Difference]: With dead ends: 5231 [2021-06-05 18:27:49,584 INFO L226 Difference]: Without dead ends: 4961 [2021-06-05 18:27:49,585 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 754.5ms TimeCoverageRelationStatistics Valid=1074, Invalid=2958, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 18:27:49,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4961 states. [2021-06-05 18:27:49,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4961 to 3588. [2021-06-05 18:27:49,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3588 states, 3587 states have (on average 2.7468636743797044) internal successors, (9853), 3587 states have internal predecessors, (9853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:49,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3588 states to 3588 states and 9853 transitions. [2021-06-05 18:27:49,620 INFO L78 Accepts]: Start accepts. Automaton has 3588 states and 9853 transitions. Word has length 165 [2021-06-05 18:27:49,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:49,620 INFO L482 AbstractCegarLoop]: Abstraction has 3588 states and 9853 transitions. [2021-06-05 18:27:49,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:49,620 INFO L276 IsEmpty]: Start isEmpty. Operand 3588 states and 9853 transitions. [2021-06-05 18:27:49,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:27:49,622 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:49,623 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:49,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-06-05 18:27:49,823 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:49,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:49,823 INFO L82 PathProgramCache]: Analyzing trace with hash -2119657957, now seen corresponding path program 348 times [2021-06-05 18:27:49,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:49,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318182922] [2021-06-05 18:27:49,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:49,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:50,159 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:50,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:50,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318182922] [2021-06-05 18:27:50,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318182922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:50,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132690462] [2021-06-05 18:27:50,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:50,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 18:27:50,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:50,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:27:50,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:50,439 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:50,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132690462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:50,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:50,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-05 18:27:50,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189876527] [2021-06-05 18:27:50,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:27:50,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:50,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:27:50,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:27:50,440 INFO L87 Difference]: Start difference. First operand 3588 states and 9853 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:51,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:51,097 INFO L93 Difference]: Finished difference Result 5901 states and 14682 transitions. [2021-06-05 18:27:51,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:27:51,097 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-05 18:27:51,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:51,102 INFO L225 Difference]: With dead ends: 5901 [2021-06-05 18:27:51,102 INFO L226 Difference]: Without dead ends: 5631 [2021-06-05 18:27:51,103 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 791.0ms TimeCoverageRelationStatistics Valid=1139, Invalid=3283, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 18:27:51,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5631 states. [2021-06-05 18:27:51,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5631 to 3663. [2021-06-05 18:27:51,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3663 states, 3662 states have (on average 2.75204806116876) internal successors, (10078), 3662 states have internal predecessors, (10078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:51,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 10078 transitions. [2021-06-05 18:27:51,139 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 10078 transitions. Word has length 165 [2021-06-05 18:27:51,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:51,139 INFO L482 AbstractCegarLoop]: Abstraction has 3663 states and 10078 transitions. [2021-06-05 18:27:51,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:51,139 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 10078 transitions. [2021-06-05 18:27:51,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:27:51,142 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:51,142 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:51,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable356,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:51,342 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:51,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:51,343 INFO L82 PathProgramCache]: Analyzing trace with hash 269306281, now seen corresponding path program 349 times [2021-06-05 18:27:51,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:51,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659881608] [2021-06-05 18:27:51,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:51,669 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:51,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:51,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659881608] [2021-06-05 18:27:51,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659881608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:51,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417293516] [2021-06-05 18:27:51,670 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:51,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:51,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:27:51,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:51,917 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:51,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417293516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:51,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:51,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-05 18:27:51,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967544412] [2021-06-05 18:27:51,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:27:51,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:51,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:27:51,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:27:51,918 INFO L87 Difference]: Start difference. First operand 3663 states and 10078 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:52,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:52,616 INFO L93 Difference]: Finished difference Result 5931 states and 14817 transitions. [2021-06-05 18:27:52,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:27:52,617 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-05 18:27:52,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:52,622 INFO L225 Difference]: With dead ends: 5931 [2021-06-05 18:27:52,622 INFO L226 Difference]: Without dead ends: 5661 [2021-06-05 18:27:52,622 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 771.8ms TimeCoverageRelationStatistics Valid=1131, Invalid=3291, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 18:27:52,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5661 states. [2021-06-05 18:27:52,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5661 to 3738. [2021-06-05 18:27:52,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3738 states, 3737 states have (on average 2.757024351083757) internal successors, (10303), 3737 states have internal predecessors, (10303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:52,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 10303 transitions. [2021-06-05 18:27:52,661 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 10303 transitions. Word has length 165 [2021-06-05 18:27:52,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:52,661 INFO L482 AbstractCegarLoop]: Abstraction has 3738 states and 10303 transitions. [2021-06-05 18:27:52,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:52,662 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 10303 transitions. [2021-06-05 18:27:52,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:27:52,664 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:52,664 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:52,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-06-05 18:27:52,865 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:52,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:52,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1152358041, now seen corresponding path program 350 times [2021-06-05 18:27:52,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:52,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719292642] [2021-06-05 18:27:52,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:52,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:53,186 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:53,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:53,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719292642] [2021-06-05 18:27:53,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719292642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:53,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145789843] [2021-06-05 18:27:53,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:53,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:27:53,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:53,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:27:53,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:53,443 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:53,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145789843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:53,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:53,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-05 18:27:53,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118208404] [2021-06-05 18:27:53,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:27:53,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:53,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:27:53,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:27:53,444 INFO L87 Difference]: Start difference. First operand 3738 states and 10303 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:54,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:54,200 INFO L93 Difference]: Finished difference Result 5956 states and 14942 transitions. [2021-06-05 18:27:54,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 18:27:54,200 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-05 18:27:54,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:54,205 INFO L225 Difference]: With dead ends: 5956 [2021-06-05 18:27:54,205 INFO L226 Difference]: Without dead ends: 5686 [2021-06-05 18:27:54,205 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 822.7ms TimeCoverageRelationStatistics Valid=1153, Invalid=3539, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 18:27:54,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2021-06-05 18:27:54,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 3813. [2021-06-05 18:27:54,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3813 states, 3812 states have (on average 2.7618048268625395) internal successors, (10528), 3812 states have internal predecessors, (10528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:54,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 10528 transitions. [2021-06-05 18:27:54,244 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 10528 transitions. Word has length 165 [2021-06-05 18:27:54,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:54,244 INFO L482 AbstractCegarLoop]: Abstraction has 3813 states and 10528 transitions. [2021-06-05 18:27:54,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:54,244 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 10528 transitions. [2021-06-05 18:27:54,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:27:54,247 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:54,247 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:54,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:54,447 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:54,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:54,447 INFO L82 PathProgramCache]: Analyzing trace with hash -739851353, now seen corresponding path program 351 times [2021-06-05 18:27:54,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:54,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786862679] [2021-06-05 18:27:54,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:54,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:54,753 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:54,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:54,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786862679] [2021-06-05 18:27:54,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786862679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:54,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585056412] [2021-06-05 18:27:54,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:54,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 18:27:54,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:54,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 54 conjunts are in the unsatisfiable core [2021-06-05 18:27:54,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:55,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585056412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:55,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:55,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-05 18:27:55,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288479011] [2021-06-05 18:27:55,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:27:55,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:55,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:27:55,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:27:55,002 INFO L87 Difference]: Start difference. First operand 3813 states and 10528 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:55,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:55,680 INFO L93 Difference]: Finished difference Result 5981 states and 15067 transitions. [2021-06-05 18:27:55,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:27:55,680 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-05 18:27:55,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:55,685 INFO L225 Difference]: With dead ends: 5981 [2021-06-05 18:27:55,685 INFO L226 Difference]: Without dead ends: 5711 [2021-06-05 18:27:55,686 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 752.2ms TimeCoverageRelationStatistics Valid=1159, Invalid=3533, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 18:27:55,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5711 states. [2021-06-05 18:27:55,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5711 to 3888. [2021-06-05 18:27:55,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3888 states, 3887 states have (on average 2.7664008232570105) internal successors, (10753), 3887 states have internal predecessors, (10753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:55,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3888 states to 3888 states and 10753 transitions. [2021-06-05 18:27:55,727 INFO L78 Accepts]: Start accepts. Automaton has 3888 states and 10753 transitions. Word has length 165 [2021-06-05 18:27:55,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:55,727 INFO L482 AbstractCegarLoop]: Abstraction has 3888 states and 10753 transitions. [2021-06-05 18:27:55,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:55,727 INFO L276 IsEmpty]: Start isEmpty. Operand 3888 states and 10753 transitions. [2021-06-05 18:27:55,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:27:55,730 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:55,730 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:55,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-06-05 18:27:55,930 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:55,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:55,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1101495447, now seen corresponding path program 352 times [2021-06-05 18:27:55,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:55,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636588167] [2021-06-05 18:27:55,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:56,242 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:56,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:56,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636588167] [2021-06-05 18:27:56,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636588167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:56,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137194752] [2021-06-05 18:27:56,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:56,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:27:56,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:56,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:27:56,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:56,519 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:56,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137194752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:56,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:56,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-05 18:27:56,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377232413] [2021-06-05 18:27:56,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:27:56,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:56,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:27:56,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:27:56,520 INFO L87 Difference]: Start difference. First operand 3888 states and 10753 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:57,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:57,325 INFO L93 Difference]: Finished difference Result 6006 states and 15192 transitions. [2021-06-05 18:27:57,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:27:57,326 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-05 18:27:57,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:57,331 INFO L225 Difference]: With dead ends: 6006 [2021-06-05 18:27:57,331 INFO L226 Difference]: Without dead ends: 5736 [2021-06-05 18:27:57,331 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 848.5ms TimeCoverageRelationStatistics Valid=1183, Invalid=3787, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 18:27:57,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5736 states. [2021-06-05 18:27:57,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5736 to 3963. [2021-06-05 18:27:57,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3963 states, 3962 states have (on average 2.7708228167592126) internal successors, (10978), 3962 states have internal predecessors, (10978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:57,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3963 states to 3963 states and 10978 transitions. [2021-06-05 18:27:57,371 INFO L78 Accepts]: Start accepts. Automaton has 3963 states and 10978 transitions. Word has length 165 [2021-06-05 18:27:57,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:57,371 INFO L482 AbstractCegarLoop]: Abstraction has 3963 states and 10978 transitions. [2021-06-05 18:27:57,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:57,371 INFO L276 IsEmpty]: Start isEmpty. Operand 3963 states and 10978 transitions. [2021-06-05 18:27:57,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:27:57,374 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:57,374 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:57,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:57,574 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:57,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:57,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1983054629, now seen corresponding path program 353 times [2021-06-05 18:27:57,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:57,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437661392] [2021-06-05 18:27:57,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:57,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:57,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437661392] [2021-06-05 18:27:57,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437661392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:57,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866044568] [2021-06-05 18:27:57,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:57,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 18:27:57,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:57,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:27:57,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:58,122 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:58,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866044568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:58,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:58,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-05 18:27:58,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224108069] [2021-06-05 18:27:58,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:27:58,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:58,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:27:58,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:27:58,123 INFO L87 Difference]: Start difference. First operand 3963 states and 10978 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:58,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:58,866 INFO L93 Difference]: Finished difference Result 6031 states and 15317 transitions. [2021-06-05 18:27:58,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:27:58,866 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-05 18:27:58,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:58,871 INFO L225 Difference]: With dead ends: 6031 [2021-06-05 18:27:58,872 INFO L226 Difference]: Without dead ends: 5761 [2021-06-05 18:27:58,872 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 795.8ms TimeCoverageRelationStatistics Valid=1203, Invalid=3767, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 18:27:58,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5761 states. [2021-06-05 18:27:58,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5761 to 4038. [2021-06-05 18:27:58,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4038 states, 4037 states have (on average 2.775080505325737) internal successors, (11203), 4037 states have internal predecessors, (11203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:58,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4038 states to 4038 states and 11203 transitions. [2021-06-05 18:27:58,912 INFO L78 Accepts]: Start accepts. Automaton has 4038 states and 11203 transitions. Word has length 165 [2021-06-05 18:27:58,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:58,912 INFO L482 AbstractCegarLoop]: Abstraction has 4038 states and 11203 transitions. [2021-06-05 18:27:58,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:58,912 INFO L276 IsEmpty]: Start isEmpty. Operand 4038 states and 11203 transitions. [2021-06-05 18:27:58,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:27:58,915 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:58,915 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:27:59,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:59,115 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:59,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:59,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1340680213, now seen corresponding path program 354 times [2021-06-05 18:27:59,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:59,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956088746] [2021-06-05 18:27:59,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:59,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:59,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:59,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956088746] [2021-06-05 18:27:59,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956088746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:59,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816406435] [2021-06-05 18:27:59,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:59,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 18:27:59,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:59,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:27:59,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:59,707 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:59,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816406435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:59,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:59,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-05 18:27:59,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532226115] [2021-06-05 18:27:59,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:27:59,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:59,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:27:59,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:27:59,707 INFO L87 Difference]: Start difference. First operand 4038 states and 11203 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:00,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:00,543 INFO L93 Difference]: Finished difference Result 6056 states and 15442 transitions. [2021-06-05 18:28:00,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:28:00,543 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-05 18:28:00,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:00,548 INFO L225 Difference]: With dead ends: 6056 [2021-06-05 18:28:00,548 INFO L226 Difference]: Without dead ends: 5786 [2021-06-05 18:28:00,549 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 909.4ms TimeCoverageRelationStatistics Valid=1229, Invalid=4027, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 18:28:00,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5786 states. [2021-06-05 18:28:00,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5786 to 4113. [2021-06-05 18:28:00,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4113 states, 4112 states have (on average 2.779182879377432) internal successors, (11428), 4112 states have internal predecessors, (11428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:00,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4113 states to 4113 states and 11428 transitions. [2021-06-05 18:28:00,590 INFO L78 Accepts]: Start accepts. Automaton has 4113 states and 11428 transitions. Word has length 165 [2021-06-05 18:28:00,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:00,590 INFO L482 AbstractCegarLoop]: Abstraction has 4113 states and 11428 transitions. [2021-06-05 18:28:00,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:00,590 INFO L276 IsEmpty]: Start isEmpty. Operand 4113 states and 11428 transitions. [2021-06-05 18:28:00,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:28:00,593 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:00,593 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:00,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:00,794 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:00,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:00,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1294133283, now seen corresponding path program 355 times [2021-06-05 18:28:00,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:00,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942226241] [2021-06-05 18:28:00,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:00,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:01,075 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:01,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:01,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942226241] [2021-06-05 18:28:01,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942226241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:01,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518412928] [2021-06-05 18:28:01,076 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:01,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:01,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:28:01,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:01,313 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:01,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518412928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:01,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:01,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-05 18:28:01,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788006841] [2021-06-05 18:28:01,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:28:01,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:01,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:28:01,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:28:01,314 INFO L87 Difference]: Start difference. First operand 4113 states and 11428 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:02,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:02,061 INFO L93 Difference]: Finished difference Result 6081 states and 15567 transitions. [2021-06-05 18:28:02,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:28:02,062 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-05 18:28:02,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:02,066 INFO L225 Difference]: With dead ends: 6081 [2021-06-05 18:28:02,066 INFO L226 Difference]: Without dead ends: 5811 [2021-06-05 18:28:02,066 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 799.9ms TimeCoverageRelationStatistics Valid=1263, Invalid=3993, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 18:28:02,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5811 states. [2021-06-05 18:28:02,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5811 to 4188. [2021-06-05 18:28:02,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4188 states, 4187 states have (on average 2.7831382851683784) internal successors, (11653), 4187 states have internal predecessors, (11653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:02,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4188 states to 4188 states and 11653 transitions. [2021-06-05 18:28:02,106 INFO L78 Accepts]: Start accepts. Automaton has 4188 states and 11653 transitions. Word has length 165 [2021-06-05 18:28:02,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:02,106 INFO L482 AbstractCegarLoop]: Abstraction has 4188 states and 11653 transitions. [2021-06-05 18:28:02,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:02,106 INFO L276 IsEmpty]: Start isEmpty. Operand 4188 states and 11653 transitions. [2021-06-05 18:28:02,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:28:02,109 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:02,109 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:02,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable363 [2021-06-05 18:28:02,310 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:02,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:02,310 INFO L82 PathProgramCache]: Analyzing trace with hash 375748883, now seen corresponding path program 356 times [2021-06-05 18:28:02,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:02,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182385942] [2021-06-05 18:28:02,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:02,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:02,603 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:02,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:02,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182385942] [2021-06-05 18:28:02,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182385942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:02,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746172591] [2021-06-05 18:28:02,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:02,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:28:02,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:02,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:28:02,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:02,865 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:02,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746172591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:02,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:02,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-05 18:28:02,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14405730] [2021-06-05 18:28:02,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:28:02,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:02,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:28:02,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:28:02,866 INFO L87 Difference]: Start difference. First operand 4188 states and 11653 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:03,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:03,760 INFO L93 Difference]: Finished difference Result 6106 states and 15692 transitions. [2021-06-05 18:28:03,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 18:28:03,760 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-05 18:28:03,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:03,766 INFO L225 Difference]: With dead ends: 6106 [2021-06-05 18:28:03,766 INFO L226 Difference]: Without dead ends: 5836 [2021-06-05 18:28:03,766 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 933.9ms TimeCoverageRelationStatistics Valid=1291, Invalid=4259, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 18:28:03,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5836 states. [2021-06-05 18:28:03,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5836 to 4263. [2021-06-05 18:28:03,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4263 states, 4262 states have (on average 2.786954481464101) internal successors, (11878), 4262 states have internal predecessors, (11878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:03,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4263 states to 4263 states and 11878 transitions. [2021-06-05 18:28:03,814 INFO L78 Accepts]: Start accepts. Automaton has 4263 states and 11878 transitions. Word has length 165 [2021-06-05 18:28:03,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:03,814 INFO L482 AbstractCegarLoop]: Abstraction has 4263 states and 11878 transitions. [2021-06-05 18:28:03,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:03,814 INFO L276 IsEmpty]: Start isEmpty. Operand 4263 states and 11878 transitions. [2021-06-05 18:28:03,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:28:03,817 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:03,817 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:04,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable364,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:04,018 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:04,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:04,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1400941919, now seen corresponding path program 357 times [2021-06-05 18:28:04,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:04,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333997153] [2021-06-05 18:28:04,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:04,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:04,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:04,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333997153] [2021-06-05 18:28:04,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333997153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:04,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456332256] [2021-06-05 18:28:04,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:04,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 18:28:04,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:04,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 18:28:04,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:04,572 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:04,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456332256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:04,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:04,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-05 18:28:04,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491308755] [2021-06-05 18:28:04,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:28:04,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:04,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:28:04,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:28:04,573 INFO L87 Difference]: Start difference. First operand 4263 states and 11878 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:05,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:05,364 INFO L93 Difference]: Finished difference Result 6131 states and 15817 transitions. [2021-06-05 18:28:05,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 18:28:05,364 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-05 18:28:05,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:05,370 INFO L225 Difference]: With dead ends: 6131 [2021-06-05 18:28:05,370 INFO L226 Difference]: Without dead ends: 5861 [2021-06-05 18:28:05,370 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 823.9ms TimeCoverageRelationStatistics Valid=1339, Invalid=4211, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 18:28:05,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5861 states. [2021-06-05 18:28:05,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5861 to 4338. [2021-06-05 18:28:05,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4338 states, 4337 states have (on average 2.790638690338944) internal successors, (12103), 4337 states have internal predecessors, (12103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:05,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4338 states to 4338 states and 12103 transitions. [2021-06-05 18:28:05,416 INFO L78 Accepts]: Start accepts. Automaton has 4338 states and 12103 transitions. Word has length 165 [2021-06-05 18:28:05,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:05,416 INFO L482 AbstractCegarLoop]: Abstraction has 4338 states and 12103 transitions. [2021-06-05 18:28:05,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:05,416 INFO L276 IsEmpty]: Start isEmpty. Operand 4338 states and 12103 transitions. [2021-06-05 18:28:05,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:28:05,419 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:05,419 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:05,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-06-05 18:28:05,620 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:05,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:05,620 INFO L82 PathProgramCache]: Analyzing trace with hash 698699665, now seen corresponding path program 358 times [2021-06-05 18:28:05,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:05,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874122356] [2021-06-05 18:28:05,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:05,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:05,902 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:05,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:05,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874122356] [2021-06-05 18:28:05,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874122356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:05,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567690214] [2021-06-05 18:28:05,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:05,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:28:05,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:05,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:28:05,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:06,161 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:06,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567690214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:06,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:06,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-05 18:28:06,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264746486] [2021-06-05 18:28:06,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:28:06,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:06,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:28:06,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:28:06,162 INFO L87 Difference]: Start difference. First operand 4338 states and 12103 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:07,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:07,071 INFO L93 Difference]: Finished difference Result 6156 states and 15942 transitions. [2021-06-05 18:28:07,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 18:28:07,072 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-05 18:28:07,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:07,077 INFO L225 Difference]: With dead ends: 6156 [2021-06-05 18:28:07,077 INFO L226 Difference]: Without dead ends: 5886 [2021-06-05 18:28:07,077 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 959.3ms TimeCoverageRelationStatistics Valid=1369, Invalid=4483, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 18:28:07,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5886 states. [2021-06-05 18:28:07,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5886 to 4413. [2021-06-05 18:28:07,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4413 states, 4412 states have (on average 2.7941976427923843) internal successors, (12328), 4412 states have internal predecessors, (12328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:07,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4413 states to 4413 states and 12328 transitions. [2021-06-05 18:28:07,137 INFO L78 Accepts]: Start accepts. Automaton has 4413 states and 12328 transitions. Word has length 165 [2021-06-05 18:28:07,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:07,137 INFO L482 AbstractCegarLoop]: Abstraction has 4413 states and 12328 transitions. [2021-06-05 18:28:07,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:07,137 INFO L276 IsEmpty]: Start isEmpty. Operand 4413 states and 12328 transitions. [2021-06-05 18:28:07,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:28:07,140 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:07,140 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:07,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 362 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-05 18:28:07,340 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:07,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:07,341 INFO L82 PathProgramCache]: Analyzing trace with hash -2086067553, now seen corresponding path program 359 times [2021-06-05 18:28:07,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:07,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796906496] [2021-06-05 18:28:07,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:07,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:07,615 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:07,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:07,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796906496] [2021-06-05 18:28:07,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796906496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:07,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962667031] [2021-06-05 18:28:07,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:07,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 18:28:07,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:07,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:28:07,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:07,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962667031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:07,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:07,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-05 18:28:07,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394437984] [2021-06-05 18:28:07,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:28:07,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:07,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:28:07,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:28:07,852 INFO L87 Difference]: Start difference. First operand 4413 states and 12328 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:08,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:08,670 INFO L93 Difference]: Finished difference Result 6181 states and 16067 transitions. [2021-06-05 18:28:08,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 18:28:08,670 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-05 18:28:08,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:08,675 INFO L225 Difference]: With dead ends: 6181 [2021-06-05 18:28:08,675 INFO L226 Difference]: Without dead ends: 5911 [2021-06-05 18:28:08,676 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 858.4ms TimeCoverageRelationStatistics Valid=1431, Invalid=4421, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 18:28:08,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5911 states. [2021-06-05 18:28:08,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5911 to 4488. [2021-06-05 18:28:08,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4488 states, 4487 states have (on average 2.797637619790506) internal successors, (12553), 4487 states have internal predecessors, (12553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:08,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4488 states to 4488 states and 12553 transitions. [2021-06-05 18:28:08,725 INFO L78 Accepts]: Start accepts. Automaton has 4488 states and 12553 transitions. Word has length 165 [2021-06-05 18:28:08,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:08,725 INFO L482 AbstractCegarLoop]: Abstraction has 4488 states and 12553 transitions. [2021-06-05 18:28:08,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:08,726 INFO L276 IsEmpty]: Start isEmpty. Operand 4488 states and 12553 transitions. [2021-06-05 18:28:08,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:28:08,729 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:08,729 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:08,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-06-05 18:28:08,936 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:08,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:08,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1446409329, now seen corresponding path program 360 times [2021-06-05 18:28:08,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:08,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806165453] [2021-06-05 18:28:08,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:08,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:09,222 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:09,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:09,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806165453] [2021-06-05 18:28:09,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806165453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:09,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982208157] [2021-06-05 18:28:09,222 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:09,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 18:28:09,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:09,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:28:09,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:09,486 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:09,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982208157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:09,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:09,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-05 18:28:09,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045200321] [2021-06-05 18:28:09,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:28:09,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:09,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:28:09,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:28:09,487 INFO L87 Difference]: Start difference. First operand 4488 states and 12553 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:10,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:10,476 INFO L93 Difference]: Finished difference Result 6206 states and 16192 transitions. [2021-06-05 18:28:10,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 18:28:10,477 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-05 18:28:10,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:10,482 INFO L225 Difference]: With dead ends: 6206 [2021-06-05 18:28:10,482 INFO L226 Difference]: Without dead ends: 5936 [2021-06-05 18:28:10,482 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 1030.0ms TimeCoverageRelationStatistics Valid=1463, Invalid=4699, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 18:28:10,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5936 states. [2021-06-05 18:28:10,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5936 to 4563. [2021-06-05 18:28:10,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4563 states, 4562 states have (on average 2.800964489259097) internal successors, (12778), 4562 states have internal predecessors, (12778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:10,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 12778 transitions. [2021-06-05 18:28:10,530 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 12778 transitions. Word has length 165 [2021-06-05 18:28:10,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:10,531 INFO L482 AbstractCegarLoop]: Abstraction has 4563 states and 12778 transitions. [2021-06-05 18:28:10,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:10,531 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 12778 transitions. [2021-06-05 18:28:10,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:28:10,534 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:10,534 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:10,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2021-06-05 18:28:10,734 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:10,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:10,735 INFO L82 PathProgramCache]: Analyzing trace with hash 2073638941, now seen corresponding path program 361 times [2021-06-05 18:28:10,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:10,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411175742] [2021-06-05 18:28:10,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:10,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:11,006 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:11,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:11,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411175742] [2021-06-05 18:28:11,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411175742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:11,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456876905] [2021-06-05 18:28:11,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:11,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:11,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:28:11,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:11,243 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:11,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456876905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:11,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:11,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-05 18:28:11,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309566563] [2021-06-05 18:28:11,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:28:11,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:11,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:28:11,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:28:11,244 INFO L87 Difference]: Start difference. First operand 4563 states and 12778 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:12,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:12,121 INFO L93 Difference]: Finished difference Result 6231 states and 16317 transitions. [2021-06-05 18:28:12,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 18:28:12,121 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-05 18:28:12,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:12,126 INFO L225 Difference]: With dead ends: 6231 [2021-06-05 18:28:12,127 INFO L226 Difference]: Without dead ends: 5961 [2021-06-05 18:28:12,127 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 884.1ms TimeCoverageRelationStatistics Valid=1539, Invalid=4623, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 18:28:12,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5961 states. [2021-06-05 18:28:12,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5961 to 4638. [2021-06-05 18:28:12,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4638 states, 4637 states have (on average 2.8041837394867373) internal successors, (13003), 4637 states have internal predecessors, (13003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:12,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4638 states to 4638 states and 13003 transitions. [2021-06-05 18:28:12,177 INFO L78 Accepts]: Start accepts. Automaton has 4638 states and 13003 transitions. Word has length 165 [2021-06-05 18:28:12,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:12,177 INFO L482 AbstractCegarLoop]: Abstraction has 4638 states and 13003 transitions. [2021-06-05 18:28:12,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:12,177 INFO L276 IsEmpty]: Start isEmpty. Operand 4638 states and 13003 transitions. [2021-06-05 18:28:12,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:28:12,180 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:12,180 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:12,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:12,381 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:12,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:12,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1619725581, now seen corresponding path program 362 times [2021-06-05 18:28:12,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:12,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290011757] [2021-06-05 18:28:12,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:12,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:12,687 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:12,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:12,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290011757] [2021-06-05 18:28:12,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290011757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:12,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009658364] [2021-06-05 18:28:12,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:12,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:28:12,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:12,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:28:12,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:12,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009658364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:12,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:12,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-05 18:28:12,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564733013] [2021-06-05 18:28:12,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:28:12,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:12,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:28:12,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:28:12,942 INFO L87 Difference]: Start difference. First operand 4638 states and 13003 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:14,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:14,003 INFO L93 Difference]: Finished difference Result 6256 states and 16442 transitions. [2021-06-05 18:28:14,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 18:28:14,003 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-05 18:28:14,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:14,009 INFO L225 Difference]: With dead ends: 6256 [2021-06-05 18:28:14,009 INFO L226 Difference]: Without dead ends: 5986 [2021-06-05 18:28:14,009 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 1092.6ms TimeCoverageRelationStatistics Valid=1573, Invalid=4907, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 18:28:14,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5986 states. [2021-06-05 18:28:14,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5986 to 4713. [2021-06-05 18:28:14,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4713 states, 4712 states have (on average 2.807300509337861) internal successors, (13228), 4712 states have internal predecessors, (13228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:14,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4713 states to 4713 states and 13228 transitions. [2021-06-05 18:28:14,057 INFO L78 Accepts]: Start accepts. Automaton has 4713 states and 13228 transitions. Word has length 165 [2021-06-05 18:28:14,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:14,058 INFO L482 AbstractCegarLoop]: Abstraction has 4713 states and 13228 transitions. [2021-06-05 18:28:14,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:14,058 INFO L276 IsEmpty]: Start isEmpty. Operand 4713 states and 13228 transitions. [2021-06-05 18:28:14,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:28:14,061 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:14,061 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:14,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable370 [2021-06-05 18:28:14,261 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:14,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:14,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1797229797, now seen corresponding path program 363 times [2021-06-05 18:28:14,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:14,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827861463] [2021-06-05 18:28:14,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:14,528 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:14,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:14,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827861463] [2021-06-05 18:28:14,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827861463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:14,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756444345] [2021-06-05 18:28:14,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:14,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 18:28:14,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:14,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 18:28:14,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:14,772 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:14,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756444345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:14,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:14,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-05 18:28:14,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957515865] [2021-06-05 18:28:14,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:28:14,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:14,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:28:14,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:28:14,773 INFO L87 Difference]: Start difference. First operand 4713 states and 13228 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:15,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:15,679 INFO L93 Difference]: Finished difference Result 6281 states and 16567 transitions. [2021-06-05 18:28:15,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 18:28:15,679 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-05 18:28:15,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:15,684 INFO L225 Difference]: With dead ends: 6281 [2021-06-05 18:28:15,684 INFO L226 Difference]: Without dead ends: 6011 [2021-06-05 18:28:15,685 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1723 ImplicationChecksByTransitivity, 926.7ms TimeCoverageRelationStatistics Valid=1663, Invalid=4817, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 18:28:15,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2021-06-05 18:28:15,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 4788. [2021-06-05 18:28:15,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4788 states, 4787 states have (on average 2.810319615625653) internal successors, (13453), 4787 states have internal predecessors, (13453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:15,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4788 states to 4788 states and 13453 transitions. [2021-06-05 18:28:15,737 INFO L78 Accepts]: Start accepts. Automaton has 4788 states and 13453 transitions. Word has length 165 [2021-06-05 18:28:15,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:15,737 INFO L482 AbstractCegarLoop]: Abstraction has 4788 states and 13453 transitions. [2021-06-05 18:28:15,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:15,738 INFO L276 IsEmpty]: Start isEmpty. Operand 4788 states and 13453 transitions. [2021-06-05 18:28:15,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:28:15,741 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:15,741 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:15,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:15,942 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:15,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:15,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1597682699, now seen corresponding path program 364 times [2021-06-05 18:28:15,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:15,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763809205] [2021-06-05 18:28:15,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:15,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:16,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:16,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763809205] [2021-06-05 18:28:16,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763809205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:16,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581989354] [2021-06-05 18:28:16,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:16,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:28:16,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:16,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:28:16,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:16,467 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:16,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581989354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:16,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:16,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-05 18:28:16,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330645501] [2021-06-05 18:28:16,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:28:16,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:16,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:28:16,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:28:16,468 INFO L87 Difference]: Start difference. First operand 4788 states and 13453 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:17,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:17,570 INFO L93 Difference]: Finished difference Result 6306 states and 16692 transitions. [2021-06-05 18:28:17,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 18:28:17,570 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-05 18:28:17,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:17,575 INFO L225 Difference]: With dead ends: 6306 [2021-06-05 18:28:17,575 INFO L226 Difference]: Without dead ends: 6036 [2021-06-05 18:28:17,576 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 1108.2ms TimeCoverageRelationStatistics Valid=1699, Invalid=5107, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 18:28:17,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6036 states. [2021-06-05 18:28:17,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6036 to 4863. [2021-06-05 18:28:17,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4863 states, 4862 states have (on average 2.8132455779514602) internal successors, (13678), 4862 states have internal predecessors, (13678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:17,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4863 states to 4863 states and 13678 transitions. [2021-06-05 18:28:17,649 INFO L78 Accepts]: Start accepts. Automaton has 4863 states and 13678 transitions. Word has length 165 [2021-06-05 18:28:17,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:17,649 INFO L482 AbstractCegarLoop]: Abstraction has 4863 states and 13678 transitions. [2021-06-05 18:28:17,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:17,649 INFO L276 IsEmpty]: Start isEmpty. Operand 4863 states and 13678 transitions. [2021-06-05 18:28:17,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:28:17,653 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:17,653 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:17,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:17,853 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:17,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:17,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1168618393, now seen corresponding path program 365 times [2021-06-05 18:28:17,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:17,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153650031] [2021-06-05 18:28:17,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:17,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:18,122 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:18,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:18,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153650031] [2021-06-05 18:28:18,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153650031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:18,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105168020] [2021-06-05 18:28:18,123 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:18,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 18:28:18,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:18,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:28:18,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:18,363 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:18,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105168020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:18,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:18,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-05 18:28:18,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184233783] [2021-06-05 18:28:18,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:28:18,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:18,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:28:18,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:28:18,364 INFO L87 Difference]: Start difference. First operand 4863 states and 13678 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:19,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:19,322 INFO L93 Difference]: Finished difference Result 6331 states and 16817 transitions. [2021-06-05 18:28:19,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 18:28:19,322 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-05 18:28:19,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:19,327 INFO L225 Difference]: With dead ends: 6331 [2021-06-05 18:28:19,327 INFO L226 Difference]: Without dead ends: 6061 [2021-06-05 18:28:19,328 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1854 ImplicationChecksByTransitivity, 952.4ms TimeCoverageRelationStatistics Valid=1803, Invalid=5003, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 18:28:19,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-06-05 18:28:19,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 4938. [2021-06-05 18:28:19,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4938 states, 4937 states have (on average 2.8160826412801296) internal successors, (13903), 4937 states have internal predecessors, (13903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:19,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4938 states to 4938 states and 13903 transitions. [2021-06-05 18:28:19,378 INFO L78 Accepts]: Start accepts. Automaton has 4938 states and 13903 transitions. Word has length 165 [2021-06-05 18:28:19,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:19,379 INFO L482 AbstractCegarLoop]: Abstraction has 4938 states and 13903 transitions. [2021-06-05 18:28:19,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:19,379 INFO L276 IsEmpty]: Start isEmpty. Operand 4938 states and 13903 transitions. [2021-06-05 18:28:19,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:28:19,382 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:19,382 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:19,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:19,583 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:19,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:19,583 INFO L82 PathProgramCache]: Analyzing trace with hash 482435209, now seen corresponding path program 366 times [2021-06-05 18:28:19,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:19,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624926449] [2021-06-05 18:28:19,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:19,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:19,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:19,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624926449] [2021-06-05 18:28:19,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624926449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:19,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122661463] [2021-06-05 18:28:19,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:19,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 18:28:19,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:19,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 18:28:19,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:20,116 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:20,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122661463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:20,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:20,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-05 18:28:20,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933147001] [2021-06-05 18:28:20,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:28:20,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:20,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:28:20,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:28:20,117 INFO L87 Difference]: Start difference. First operand 4938 states and 13903 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:21,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:21,257 INFO L93 Difference]: Finished difference Result 6356 states and 16942 transitions. [2021-06-05 18:28:21,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 18:28:21,257 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-05 18:28:21,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:21,262 INFO L225 Difference]: With dead ends: 6356 [2021-06-05 18:28:21,263 INFO L226 Difference]: Without dead ends: 6086 [2021-06-05 18:28:21,263 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 1127.9ms TimeCoverageRelationStatistics Valid=1703, Invalid=5437, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 18:28:21,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6086 states. [2021-06-05 18:28:21,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6086 to 5013. [2021-06-05 18:28:21,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5013 states, 5012 states have (on average 2.818834796488428) internal successors, (14128), 5012 states have internal predecessors, (14128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:21,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5013 states to 5013 states and 14128 transitions. [2021-06-05 18:28:21,318 INFO L78 Accepts]: Start accepts. Automaton has 5013 states and 14128 transitions. Word has length 165 [2021-06-05 18:28:21,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:21,318 INFO L482 AbstractCegarLoop]: Abstraction has 5013 states and 14128 transitions. [2021-06-05 18:28:21,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:21,318 INFO L276 IsEmpty]: Start isEmpty. Operand 5013 states and 14128 transitions. [2021-06-05 18:28:21,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:28:21,322 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:21,322 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:21,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:21,522 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:21,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:21,522 INFO L82 PathProgramCache]: Analyzing trace with hash 397400471, now seen corresponding path program 367 times [2021-06-05 18:28:21,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:21,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349776739] [2021-06-05 18:28:21,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:21,792 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:21,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:21,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349776739] [2021-06-05 18:28:21,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349776739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:21,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820616101] [2021-06-05 18:28:21,792 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:21,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:28:21,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:22,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820616101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:22,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:22,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-05 18:28:22,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325175481] [2021-06-05 18:28:22,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:28:22,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:22,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:28:22,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:28:22,024 INFO L87 Difference]: Start difference. First operand 5013 states and 14128 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:23,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:23,015 INFO L93 Difference]: Finished difference Result 6381 states and 17067 transitions. [2021-06-05 18:28:23,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 18:28:23,016 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-05 18:28:23,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:23,021 INFO L225 Difference]: With dead ends: 6381 [2021-06-05 18:28:23,021 INFO L226 Difference]: Without dead ends: 6111 [2021-06-05 18:28:23,022 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1989 ImplicationChecksByTransitivity, 991.5ms TimeCoverageRelationStatistics Valid=1959, Invalid=5181, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 18:28:23,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6111 states. [2021-06-05 18:28:23,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6111 to 5088. [2021-06-05 18:28:23,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5088 states, 5087 states have (on average 2.821505799095734) internal successors, (14353), 5087 states have internal predecessors, (14353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:23,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5088 states to 5088 states and 14353 transitions. [2021-06-05 18:28:23,090 INFO L78 Accepts]: Start accepts. Automaton has 5088 states and 14353 transitions. Word has length 165 [2021-06-05 18:28:23,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:23,090 INFO L482 AbstractCegarLoop]: Abstraction has 5088 states and 14353 transitions. [2021-06-05 18:28:23,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:23,090 INFO L276 IsEmpty]: Start isEmpty. Operand 5088 states and 14353 transitions. [2021-06-05 18:28:23,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:28:23,094 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:23,094 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:23,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-05 18:28:23,294 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:23,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:23,294 INFO L82 PathProgramCache]: Analyzing trace with hash 329249415, now seen corresponding path program 368 times [2021-06-05 18:28:23,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:23,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969919891] [2021-06-05 18:28:23,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:23,560 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:23,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:23,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969919891] [2021-06-05 18:28:23,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969919891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:23,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558185935] [2021-06-05 18:28:23,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:23,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:28:23,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:23,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:28:23,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:23,806 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:23,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558185935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:23,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:23,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-05 18:28:23,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956637580] [2021-06-05 18:28:23,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:28:23,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:23,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:28:23,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:28:23,807 INFO L87 Difference]: Start difference. First operand 5088 states and 14353 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:25,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:25,035 INFO L93 Difference]: Finished difference Result 6406 states and 17192 transitions. [2021-06-05 18:28:25,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 18:28:25,035 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-05 18:28:25,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:25,041 INFO L225 Difference]: With dead ends: 6406 [2021-06-05 18:28:25,041 INFO L226 Difference]: Without dead ends: 6136 [2021-06-05 18:28:25,042 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 1200.2ms TimeCoverageRelationStatistics Valid=1999, Invalid=5483, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 18:28:25,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6136 states. [2021-06-05 18:28:25,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6136 to 5163. [2021-06-05 18:28:25,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5163 states, 5162 states have (on average 2.824099186361875) internal successors, (14578), 5162 states have internal predecessors, (14578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:25,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5163 states to 5163 states and 14578 transitions. [2021-06-05 18:28:25,096 INFO L78 Accepts]: Start accepts. Automaton has 5163 states and 14578 transitions. Word has length 165 [2021-06-05 18:28:25,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:25,096 INFO L482 AbstractCegarLoop]: Abstraction has 5163 states and 14578 transitions. [2021-06-05 18:28:25,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:25,096 INFO L276 IsEmpty]: Start isEmpty. Operand 5163 states and 14578 transitions. [2021-06-05 18:28:25,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:28:25,100 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:25,100 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:25,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-05 18:28:25,300 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:25,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:25,300 INFO L82 PathProgramCache]: Analyzing trace with hash -967719659, now seen corresponding path program 369 times [2021-06-05 18:28:25,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:25,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195875734] [2021-06-05 18:28:25,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:25,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:25,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:25,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195875734] [2021-06-05 18:28:25,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195875734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:25,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943128330] [2021-06-05 18:28:25,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:25,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 18:28:25,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:25,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:28:25,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:25,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943128330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:25,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:25,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-05 18:28:25,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535459267] [2021-06-05 18:28:25,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:28:25,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:25,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:28:25,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:28:25,845 INFO L87 Difference]: Start difference. First operand 5163 states and 14578 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:26,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:26,850 INFO L93 Difference]: Finished difference Result 6431 states and 17317 transitions. [2021-06-05 18:28:26,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 18:28:26,851 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-05 18:28:26,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:26,857 INFO L225 Difference]: With dead ends: 6431 [2021-06-05 18:28:26,857 INFO L226 Difference]: Without dead ends: 6161 [2021-06-05 18:28:26,857 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2128 ImplicationChecksByTransitivity, 1003.6ms TimeCoverageRelationStatistics Valid=2131, Invalid=5351, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 18:28:26,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6161 states. [2021-06-05 18:28:26,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6161 to 5238. [2021-06-05 18:28:26,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5238 states, 5237 states have (on average 2.8266182929157915) internal successors, (14803), 5237 states have internal predecessors, (14803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:26,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5238 states to 5238 states and 14803 transitions. [2021-06-05 18:28:26,912 INFO L78 Accepts]: Start accepts. Automaton has 5238 states and 14803 transitions. Word has length 165 [2021-06-05 18:28:26,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:26,912 INFO L482 AbstractCegarLoop]: Abstraction has 5238 states and 14803 transitions. [2021-06-05 18:28:26,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:26,912 INFO L276 IsEmpty]: Start isEmpty. Operand 5238 states and 14803 transitions. [2021-06-05 18:28:26,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:28:26,915 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:26,915 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:27,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-06-05 18:28:27,116 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:27,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:27,116 INFO L82 PathProgramCache]: Analyzing trace with hash -537966075, now seen corresponding path program 370 times [2021-06-05 18:28:27,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:27,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906874014] [2021-06-05 18:28:27,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:27,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:27,388 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:27,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:27,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906874014] [2021-06-05 18:28:27,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906874014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:27,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937588733] [2021-06-05 18:28:27,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:27,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:28:27,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:27,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:28:27,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:27,633 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:27,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937588733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:27,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:27,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-05 18:28:27,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975002405] [2021-06-05 18:28:27,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:28:27,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:27,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:28:27,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:28:27,634 INFO L87 Difference]: Start difference. First operand 5238 states and 14803 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:28,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:28,905 INFO L93 Difference]: Finished difference Result 6516 states and 17607 transitions. [2021-06-05 18:28:28,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 18:28:28,906 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-05 18:28:28,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:28,911 INFO L225 Difference]: With dead ends: 6516 [2021-06-05 18:28:28,911 INFO L226 Difference]: Without dead ends: 6246 [2021-06-05 18:28:28,912 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2179 ImplicationChecksByTransitivity, 1250.2ms TimeCoverageRelationStatistics Valid=2173, Invalid=5659, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 18:28:28,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6246 states. [2021-06-05 18:28:28,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6246 to 5313. [2021-06-05 18:28:28,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5313 states, 5312 states have (on average 2.8328313253012047) internal successors, (15048), 5312 states have internal predecessors, (15048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:28,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5313 states to 5313 states and 15048 transitions. [2021-06-05 18:28:28,966 INFO L78 Accepts]: Start accepts. Automaton has 5313 states and 15048 transitions. Word has length 165 [2021-06-05 18:28:28,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:28,966 INFO L482 AbstractCegarLoop]: Abstraction has 5313 states and 15048 transitions. [2021-06-05 18:28:28,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:28,966 INFO L276 IsEmpty]: Start isEmpty. Operand 5313 states and 15048 transitions. [2021-06-05 18:28:28,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:28:28,970 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:28,970 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:29,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 18:28:29,170 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:29,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:29,171 INFO L82 PathProgramCache]: Analyzing trace with hash -595700205, now seen corresponding path program 371 times [2021-06-05 18:28:29,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:29,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164118480] [2021-06-05 18:28:29,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:29,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:29,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:29,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164118480] [2021-06-05 18:28:29,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164118480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:29,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74765698] [2021-06-05 18:28:29,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:29,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 18:28:29,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:29,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:28:29,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:29,682 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:29,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74765698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:29,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:29,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-05 18:28:29,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294478840] [2021-06-05 18:28:29,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:28:29,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:29,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:28:29,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:28:29,683 INFO L87 Difference]: Start difference. First operand 5313 states and 15048 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:30,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:30,738 INFO L93 Difference]: Finished difference Result 7258 states and 19731 transitions. [2021-06-05 18:28:30,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 18:28:30,738 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-05 18:28:30,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:30,745 INFO L225 Difference]: With dead ends: 7258 [2021-06-05 18:28:30,745 INFO L226 Difference]: Without dead ends: 6988 [2021-06-05 18:28:30,745 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2270 ImplicationChecksByTransitivity, 1038.2ms TimeCoverageRelationStatistics Valid=2320, Invalid=5512, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 18:28:30,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6988 states. [2021-06-05 18:28:30,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6988 to 5493. [2021-06-05 18:28:30,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5493 states, 5492 states have (on average 2.841769847050255) internal successors, (15607), 5492 states have internal predecessors, (15607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:30,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5493 states to 5493 states and 15607 transitions. [2021-06-05 18:28:30,801 INFO L78 Accepts]: Start accepts. Automaton has 5493 states and 15607 transitions. Word has length 165 [2021-06-05 18:28:30,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:30,802 INFO L482 AbstractCegarLoop]: Abstraction has 5493 states and 15607 transitions. [2021-06-05 18:28:30,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:30,802 INFO L276 IsEmpty]: Start isEmpty. Operand 5493 states and 15607 transitions. [2021-06-05 18:28:30,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:28:30,828 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:30,828 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:31,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:31,028 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:31,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:31,029 INFO L82 PathProgramCache]: Analyzing trace with hash -573356955, now seen corresponding path program 372 times [2021-06-05 18:28:31,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:31,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361969870] [2021-06-05 18:28:31,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:31,302 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:31,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:31,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361969870] [2021-06-05 18:28:31,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361969870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:31,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243108166] [2021-06-05 18:28:31,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:31,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 18:28:31,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:31,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:28:31,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:31,558 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:31,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243108166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:31,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:31,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-05 18:28:31,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905033128] [2021-06-05 18:28:31,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:28:31,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:31,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:28:31,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:28:31,559 INFO L87 Difference]: Start difference. First operand 5493 states and 15607 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:32,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:32,746 INFO L93 Difference]: Finished difference Result 6720 states and 18381 transitions. [2021-06-05 18:28:32,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 18:28:32,747 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-05 18:28:32,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:32,752 INFO L225 Difference]: With dead ends: 6720 [2021-06-05 18:28:32,753 INFO L226 Difference]: Without dead ends: 6231 [2021-06-05 18:28:32,753 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2213 ImplicationChecksByTransitivity, 1179.4ms TimeCoverageRelationStatistics Valid=2129, Invalid=6061, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 18:28:32,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6231 states. [2021-06-05 18:28:32,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6231 to 3434. [2021-06-05 18:28:32,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 2.7427905621905038) internal successors, (9416), 3433 states have internal predecessors, (9416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:32,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 9416 transitions. [2021-06-05 18:28:32,790 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 9416 transitions. Word has length 165 [2021-06-05 18:28:32,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:32,790 INFO L482 AbstractCegarLoop]: Abstraction has 3434 states and 9416 transitions. [2021-06-05 18:28:32,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:32,790 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 9416 transitions. [2021-06-05 18:28:32,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:28:32,793 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:32,793 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:32,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-06-05 18:28:32,993 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:32,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:32,994 INFO L82 PathProgramCache]: Analyzing trace with hash -471160217, now seen corresponding path program 373 times [2021-06-05 18:28:32,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:32,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549072996] [2021-06-05 18:28:32,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:33,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:33,328 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:33,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:33,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549072996] [2021-06-05 18:28:33,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549072996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:33,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247285035] [2021-06-05 18:28:33,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:33,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:28:33,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:33,645 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:33,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247285035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:33,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:33,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-05 18:28:33,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63633452] [2021-06-05 18:28:33,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:28:33,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:33,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:28:33,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=976, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:28:33,646 INFO L87 Difference]: Start difference. First operand 3434 states and 9416 transitions. Second operand has 36 states, 36 states have (on average 5.5) internal successors, (198), 36 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:34,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:34,348 INFO L93 Difference]: Finished difference Result 4774 states and 12416 transitions. [2021-06-05 18:28:34,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:28:34,348 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.5) internal successors, (198), 36 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-05 18:28:34,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:34,352 INFO L225 Difference]: With dead ends: 4774 [2021-06-05 18:28:34,352 INFO L226 Difference]: Without dead ends: 4440 [2021-06-05 18:28:34,353 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 839.6ms TimeCoverageRelationStatistics Valid=1320, Invalid=3510, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 18:28:34,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4440 states. [2021-06-05 18:28:34,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4440 to 3519. [2021-06-05 18:28:34,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3519 states, 3518 states have (on average 2.72484366117112) internal successors, (9586), 3518 states have internal predecessors, (9586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:34,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3519 states to 3519 states and 9586 transitions. [2021-06-05 18:28:34,384 INFO L78 Accepts]: Start accepts. Automaton has 3519 states and 9586 transitions. Word has length 170 [2021-06-05 18:28:34,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:34,385 INFO L482 AbstractCegarLoop]: Abstraction has 3519 states and 9586 transitions. [2021-06-05 18:28:34,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.5) internal successors, (198), 36 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:34,385 INFO L276 IsEmpty]: Start isEmpty. Operand 3519 states and 9586 transitions. [2021-06-05 18:28:34,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:28:34,387 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:34,387 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:34,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:34,593 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:34,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:34,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1251320075, now seen corresponding path program 374 times [2021-06-05 18:28:34,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:34,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853904182] [2021-06-05 18:28:34,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:34,940 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:34,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:34,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853904182] [2021-06-05 18:28:34,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853904182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:34,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839168505] [2021-06-05 18:28:34,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:35,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:28:35,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:35,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:28:35,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:35,198 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:35,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839168505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:35,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:35,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-05 18:28:35,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842021374] [2021-06-05 18:28:35,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:28:35,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:35,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:28:35,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=810, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:28:35,199 INFO L87 Difference]: Start difference. First operand 3519 states and 9586 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:35,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:35,778 INFO L93 Difference]: Finished difference Result 6096 states and 14997 transitions. [2021-06-05 18:28:35,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:28:35,779 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-05 18:28:35,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:35,784 INFO L225 Difference]: With dead ends: 6096 [2021-06-05 18:28:35,784 INFO L226 Difference]: Without dead ends: 5826 [2021-06-05 18:28:35,785 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 741.5ms TimeCoverageRelationStatistics Valid=1132, Invalid=2900, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 18:28:35,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5826 states. [2021-06-05 18:28:35,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5826 to 3663. [2021-06-05 18:28:35,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3663 states, 3662 states have (on average 2.7315674494811577) internal successors, (10003), 3662 states have internal predecessors, (10003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:35,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 10003 transitions. [2021-06-05 18:28:35,823 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 10003 transitions. Word has length 170 [2021-06-05 18:28:35,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:35,823 INFO L482 AbstractCegarLoop]: Abstraction has 3663 states and 10003 transitions. [2021-06-05 18:28:35,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:35,823 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 10003 transitions. [2021-06-05 18:28:35,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:28:35,826 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:35,826 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:36,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:36,026 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:36,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:36,027 INFO L82 PathProgramCache]: Analyzing trace with hash 310384123, now seen corresponding path program 375 times [2021-06-05 18:28:36,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:36,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384824459] [2021-06-05 18:28:36,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:36,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:36,406 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:36,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:36,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384824459] [2021-06-05 18:28:36,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384824459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:36,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125004806] [2021-06-05 18:28:36,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:36,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 18:28:36,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:36,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:28:36,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:36,690 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:36,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125004806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:36,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:36,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-05 18:28:36,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591947119] [2021-06-05 18:28:36,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:28:36,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:36,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:28:36,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:28:36,691 INFO L87 Difference]: Start difference. First operand 3663 states and 10003 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:37,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:37,362 INFO L93 Difference]: Finished difference Result 6056 states and 14992 transitions. [2021-06-05 18:28:37,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:28:37,362 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-05 18:28:37,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:37,368 INFO L225 Difference]: With dead ends: 6056 [2021-06-05 18:28:37,368 INFO L226 Difference]: Without dead ends: 5786 [2021-06-05 18:28:37,368 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 860.0ms TimeCoverageRelationStatistics Valid=1215, Invalid=3341, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 18:28:37,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5786 states. [2021-06-05 18:28:37,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5786 to 3738. [2021-06-05 18:28:37,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3738 states, 3737 states have (on average 2.7369547765587368) internal successors, (10228), 3737 states have internal predecessors, (10228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:37,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 10228 transitions. [2021-06-05 18:28:37,408 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 10228 transitions. Word has length 170 [2021-06-05 18:28:37,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:37,408 INFO L482 AbstractCegarLoop]: Abstraction has 3738 states and 10228 transitions. [2021-06-05 18:28:37,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:37,408 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 10228 transitions. [2021-06-05 18:28:37,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:28:37,411 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:37,411 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:37,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:37,611 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:37,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:37,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1941712905, now seen corresponding path program 376 times [2021-06-05 18:28:37,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:37,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717600637] [2021-06-05 18:28:37,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:37,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:37,961 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:37,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:37,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717600637] [2021-06-05 18:28:37,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717600637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:37,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482139548] [2021-06-05 18:28:37,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:38,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:28:38,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:38,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:28:38,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:38,216 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:38,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482139548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:38,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:38,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-05 18:28:38,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230146474] [2021-06-05 18:28:38,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:28:38,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:38,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:28:38,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=834, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:28:38,217 INFO L87 Difference]: Start difference. First operand 3738 states and 10228 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:38,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:38,816 INFO L93 Difference]: Finished difference Result 6106 states and 15167 transitions. [2021-06-05 18:28:38,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:28:38,829 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-05 18:28:38,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:38,834 INFO L225 Difference]: With dead ends: 6106 [2021-06-05 18:28:38,834 INFO L226 Difference]: Without dead ends: 5836 [2021-06-05 18:28:38,834 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 749.0ms TimeCoverageRelationStatistics Valid=1129, Invalid=3161, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 18:28:38,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5836 states. [2021-06-05 18:28:38,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5836 to 3813. [2021-06-05 18:28:38,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3813 states, 3812 states have (on average 2.742130115424974) internal successors, (10453), 3812 states have internal predecessors, (10453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:38,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 10453 transitions. [2021-06-05 18:28:38,870 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 10453 transitions. Word has length 170 [2021-06-05 18:28:38,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:38,870 INFO L482 AbstractCegarLoop]: Abstraction has 3813 states and 10453 transitions. [2021-06-05 18:28:38,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:38,870 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 10453 transitions. [2021-06-05 18:28:38,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:28:38,873 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:38,873 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:39,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:39,073 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:39,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:39,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1096225017, now seen corresponding path program 377 times [2021-06-05 18:28:39,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:39,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779994605] [2021-06-05 18:28:39,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:39,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:39,421 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:39,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:39,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779994605] [2021-06-05 18:28:39,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779994605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:39,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375435001] [2021-06-05 18:28:39,422 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:39,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 18:28:39,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:39,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:28:39,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:39,694 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:39,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375435001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:39,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:39,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-05 18:28:39,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877359382] [2021-06-05 18:28:39,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:28:39,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:39,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:28:39,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:28:39,695 INFO L87 Difference]: Start difference. First operand 3813 states and 10453 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:40,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:40,399 INFO L93 Difference]: Finished difference Result 6131 states and 15292 transitions. [2021-06-05 18:28:40,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 18:28:40,399 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-05 18:28:40,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:40,404 INFO L225 Difference]: With dead ends: 6131 [2021-06-05 18:28:40,404 INFO L226 Difference]: Without dead ends: 5861 [2021-06-05 18:28:40,405 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 856.9ms TimeCoverageRelationStatistics Valid=1220, Invalid=3610, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 18:28:40,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5861 states. [2021-06-05 18:28:40,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5861 to 3888. [2021-06-05 18:28:40,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3888 states, 3887 states have (on average 2.7471057370722924) internal successors, (10678), 3887 states have internal predecessors, (10678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:40,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3888 states to 3888 states and 10678 transitions. [2021-06-05 18:28:40,443 INFO L78 Accepts]: Start accepts. Automaton has 3888 states and 10678 transitions. Word has length 170 [2021-06-05 18:28:40,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:40,444 INFO L482 AbstractCegarLoop]: Abstraction has 3888 states and 10678 transitions. [2021-06-05 18:28:40,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:40,444 INFO L276 IsEmpty]: Start isEmpty. Operand 3888 states and 10678 transitions. [2021-06-05 18:28:40,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:28:40,446 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:40,446 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:40,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:40,647 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:40,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:40,647 INFO L82 PathProgramCache]: Analyzing trace with hash -809778041, now seen corresponding path program 378 times [2021-06-05 18:28:40,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:40,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84435776] [2021-06-05 18:28:40,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:40,968 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:40,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:40,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84435776] [2021-06-05 18:28:40,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84435776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:40,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536185138] [2021-06-05 18:28:40,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:41,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 18:28:41,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:41,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:28:41,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:41,232 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:41,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536185138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:41,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:41,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-05 18:28:41,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760887718] [2021-06-05 18:28:41,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:28:41,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:41,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:28:41,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:28:41,233 INFO L87 Difference]: Start difference. First operand 3888 states and 10678 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:41,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:41,905 INFO L93 Difference]: Finished difference Result 6156 states and 15417 transitions. [2021-06-05 18:28:41,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:28:41,905 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-05 18:28:41,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:41,910 INFO L225 Difference]: With dead ends: 6156 [2021-06-05 18:28:41,910 INFO L226 Difference]: Without dead ends: 5886 [2021-06-05 18:28:41,910 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 794.1ms TimeCoverageRelationStatistics Valid=1142, Invalid=3414, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 18:28:41,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5886 states. [2021-06-05 18:28:41,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5886 to 3963. [2021-06-05 18:28:41,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3963 states, 3962 states have (on average 2.7518929833417465) internal successors, (10903), 3962 states have internal predecessors, (10903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:41,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3963 states to 3963 states and 10903 transitions. [2021-06-05 18:28:41,949 INFO L78 Accepts]: Start accepts. Automaton has 3963 states and 10903 transitions. Word has length 170 [2021-06-05 18:28:41,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:41,949 INFO L482 AbstractCegarLoop]: Abstraction has 3963 states and 10903 transitions. [2021-06-05 18:28:41,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:41,949 INFO L276 IsEmpty]: Start isEmpty. Operand 3963 states and 10903 transitions. [2021-06-05 18:28:41,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:28:41,952 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:41,952 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:42,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 382 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-05 18:28:42,152 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:42,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:42,152 INFO L82 PathProgramCache]: Analyzing trace with hash 73273719, now seen corresponding path program 379 times [2021-06-05 18:28:42,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:42,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351597830] [2021-06-05 18:28:42,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:42,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:42,488 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:42,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:42,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351597830] [2021-06-05 18:28:42,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351597830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:42,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213691589] [2021-06-05 18:28:42,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:42,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:42,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:28:42,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:42,755 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:42,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213691589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:42,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:42,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-05 18:28:42,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192859991] [2021-06-05 18:28:42,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:28:42,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:42,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:28:42,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:28:42,756 INFO L87 Difference]: Start difference. First operand 3963 states and 10903 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:43,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:43,544 INFO L93 Difference]: Finished difference Result 6181 states and 15542 transitions. [2021-06-05 18:28:43,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:28:43,545 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-05 18:28:43,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:43,550 INFO L225 Difference]: With dead ends: 6181 [2021-06-05 18:28:43,550 INFO L226 Difference]: Without dead ends: 5911 [2021-06-05 18:28:43,550 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 897.1ms TimeCoverageRelationStatistics Valid=1241, Invalid=3871, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 18:28:43,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5911 states. [2021-06-05 18:28:43,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5911 to 4038. [2021-06-05 18:28:43,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4038 states, 4037 states have (on average 2.7565023532325985) internal successors, (11128), 4037 states have internal predecessors, (11128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:43,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4038 states to 4038 states and 11128 transitions. [2021-06-05 18:28:43,591 INFO L78 Accepts]: Start accepts. Automaton has 4038 states and 11128 transitions. Word has length 170 [2021-06-05 18:28:43,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:43,591 INFO L482 AbstractCegarLoop]: Abstraction has 4038 states and 11128 transitions. [2021-06-05 18:28:43,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:43,591 INFO L276 IsEmpty]: Start isEmpty. Operand 4038 states and 11128 transitions. [2021-06-05 18:28:43,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:28:43,594 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:43,594 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:43,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-06-05 18:28:43,794 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:43,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:43,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1818935675, now seen corresponding path program 380 times [2021-06-05 18:28:43,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:43,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745378561] [2021-06-05 18:28:43,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:44,132 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:44,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:44,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745378561] [2021-06-05 18:28:44,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745378561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:44,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036104208] [2021-06-05 18:28:44,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:44,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:28:44,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:44,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:28:44,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:44,387 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:44,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036104208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:44,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:44,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-05 18:28:44,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444254673] [2021-06-05 18:28:44,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:28:44,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:44,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:28:44,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:28:44,388 INFO L87 Difference]: Start difference. First operand 4038 states and 11128 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:45,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:45,090 INFO L93 Difference]: Finished difference Result 6206 states and 15667 transitions. [2021-06-05 18:28:45,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:28:45,090 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-05 18:28:45,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:45,095 INFO L225 Difference]: With dead ends: 6206 [2021-06-05 18:28:45,095 INFO L226 Difference]: Without dead ends: 5936 [2021-06-05 18:28:45,096 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 826.1ms TimeCoverageRelationStatistics Valid=1171, Invalid=3659, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 18:28:45,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5936 states. [2021-06-05 18:28:45,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5936 to 4113. [2021-06-05 18:28:45,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4113 states, 4112 states have (on average 2.760943579766537) internal successors, (11353), 4112 states have internal predecessors, (11353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:45,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4113 states to 4113 states and 11353 transitions. [2021-06-05 18:28:45,137 INFO L78 Accepts]: Start accepts. Automaton has 4113 states and 11353 transitions. Word has length 170 [2021-06-05 18:28:45,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:45,137 INFO L482 AbstractCegarLoop]: Abstraction has 4113 states and 11353 transitions. [2021-06-05 18:28:45,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:45,137 INFO L276 IsEmpty]: Start isEmpty. Operand 4113 states and 11353 transitions. [2021-06-05 18:28:45,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:28:45,140 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:45,140 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:45,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-05 18:28:45,341 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:45,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:45,341 INFO L82 PathProgramCache]: Analyzing trace with hash 22411125, now seen corresponding path program 381 times [2021-06-05 18:28:45,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:45,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672277061] [2021-06-05 18:28:45,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:45,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:45,666 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:45,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:45,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672277061] [2021-06-05 18:28:45,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672277061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:45,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58478811] [2021-06-05 18:28:45,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:45,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 18:28:45,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:45,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-05 18:28:45,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:45,933 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:45,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58478811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:45,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:45,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-05 18:28:45,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7096058] [2021-06-05 18:28:45,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:28:45,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:45,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:28:45,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:28:45,934 INFO L87 Difference]: Start difference. First operand 4113 states and 11353 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:46,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:46,767 INFO L93 Difference]: Finished difference Result 6231 states and 15792 transitions. [2021-06-05 18:28:46,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:28:46,767 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-05 18:28:46,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:46,771 INFO L225 Difference]: With dead ends: 6231 [2021-06-05 18:28:46,771 INFO L226 Difference]: Without dead ends: 5961 [2021-06-05 18:28:46,771 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 924.1ms TimeCoverageRelationStatistics Valid=1180, Invalid=3932, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 18:28:46,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5961 states. [2021-06-05 18:28:46,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5961 to 4188. [2021-06-05 18:28:46,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4188 states, 4187 states have (on average 2.7652256985908763) internal successors, (11578), 4187 states have internal predecessors, (11578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:46,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4188 states to 4188 states and 11578 transitions. [2021-06-05 18:28:46,811 INFO L78 Accepts]: Start accepts. Automaton has 4188 states and 11578 transitions. Word has length 170 [2021-06-05 18:28:46,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:46,811 INFO L482 AbstractCegarLoop]: Abstraction has 4188 states and 11578 transitions. [2021-06-05 18:28:46,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:46,811 INFO L276 IsEmpty]: Start isEmpty. Operand 4188 states and 11578 transitions. [2021-06-05 18:28:46,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:28:46,814 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:46,814 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:47,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 385 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-05 18:28:47,015 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:47,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:47,015 INFO L82 PathProgramCache]: Analyzing trace with hash 903970307, now seen corresponding path program 382 times [2021-06-05 18:28:47,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:47,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122461763] [2021-06-05 18:28:47,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:47,321 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:47,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:47,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122461763] [2021-06-05 18:28:47,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122461763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:47,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564175122] [2021-06-05 18:28:47,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:47,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:28:47,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:47,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:28:47,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:47,575 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:47,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564175122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:47,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:47,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-05 18:28:47,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091631218] [2021-06-05 18:28:47,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:28:47,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:47,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:28:47,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:28:47,576 INFO L87 Difference]: Start difference. First operand 4188 states and 11578 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:48,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:48,333 INFO L93 Difference]: Finished difference Result 6256 states and 15917 transitions. [2021-06-05 18:28:48,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:28:48,333 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-05 18:28:48,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:48,339 INFO L225 Difference]: With dead ends: 6256 [2021-06-05 18:28:48,339 INFO L226 Difference]: Without dead ends: 5986 [2021-06-05 18:28:48,339 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 832.9ms TimeCoverageRelationStatistics Valid=1216, Invalid=3896, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 18:28:48,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5986 states. [2021-06-05 18:28:48,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5986 to 4263. [2021-06-05 18:28:48,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4263 states, 4262 states have (on average 2.7693571093383387) internal successors, (11803), 4262 states have internal predecessors, (11803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:48,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4263 states to 4263 states and 11803 transitions. [2021-06-05 18:28:48,384 INFO L78 Accepts]: Start accepts. Automaton has 4263 states and 11803 transitions. Word has length 170 [2021-06-05 18:28:48,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:48,384 INFO L482 AbstractCegarLoop]: Abstraction has 4263 states and 11803 transitions. [2021-06-05 18:28:48,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:48,384 INFO L276 IsEmpty]: Start isEmpty. Operand 4263 states and 11803 transitions. [2021-06-05 18:28:48,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:28:48,387 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:48,387 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:48,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:48,587 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:48,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:48,588 INFO L82 PathProgramCache]: Analyzing trace with hash 261595891, now seen corresponding path program 383 times [2021-06-05 18:28:48,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:48,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485797488] [2021-06-05 18:28:48,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:48,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:48,904 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:48,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:48,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485797488] [2021-06-05 18:28:48,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485797488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:48,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867885070] [2021-06-05 18:28:48,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:48,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 18:28:48,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:48,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:28:48,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:49,171 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:49,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867885070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:49,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:49,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-05 18:28:49,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240677732] [2021-06-05 18:28:49,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:28:49,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:49,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:28:49,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:28:49,172 INFO L87 Difference]: Start difference. First operand 4263 states and 11803 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:50,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:50,078 INFO L93 Difference]: Finished difference Result 6281 states and 16042 transitions. [2021-06-05 18:28:50,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 18:28:50,079 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-05 18:28:50,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:50,084 INFO L225 Difference]: With dead ends: 6281 [2021-06-05 18:28:50,084 INFO L226 Difference]: Without dead ends: 6011 [2021-06-05 18:28:50,084 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 987.4ms TimeCoverageRelationStatistics Valid=1331, Invalid=4369, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 18:28:50,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2021-06-05 18:28:50,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 4338. [2021-06-05 18:28:50,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4338 states, 4337 states have (on average 2.7733456306202444) internal successors, (12028), 4337 states have internal predecessors, (12028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:50,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4338 states to 4338 states and 12028 transitions. [2021-06-05 18:28:50,129 INFO L78 Accepts]: Start accepts. Automaton has 4338 states and 12028 transitions. Word has length 170 [2021-06-05 18:28:50,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:50,129 INFO L482 AbstractCegarLoop]: Abstraction has 4338 states and 12028 transitions. [2021-06-05 18:28:50,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:50,129 INFO L276 IsEmpty]: Start isEmpty. Operand 4338 states and 12028 transitions. [2021-06-05 18:28:50,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:28:50,132 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:50,132 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:50,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:50,333 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:50,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:50,333 INFO L82 PathProgramCache]: Analyzing trace with hash 215048961, now seen corresponding path program 384 times [2021-06-05 18:28:50,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:50,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889194040] [2021-06-05 18:28:50,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:50,673 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:50,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:50,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889194040] [2021-06-05 18:28:50,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889194040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:50,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915093125] [2021-06-05 18:28:50,673 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:50,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 18:28:50,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:50,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:28:50,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:50,933 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:50,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915093125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:50,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:50,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-05 18:28:50,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676785424] [2021-06-05 18:28:50,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:28:50,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:50,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:28:50,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:28:50,934 INFO L87 Difference]: Start difference. First operand 4338 states and 12028 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:51,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:51,753 INFO L93 Difference]: Finished difference Result 6306 states and 16167 transitions. [2021-06-05 18:28:51,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:28:51,753 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-05 18:28:51,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:51,759 INFO L225 Difference]: With dead ends: 6306 [2021-06-05 18:28:51,759 INFO L226 Difference]: Without dead ends: 6036 [2021-06-05 18:28:51,760 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 923.5ms TimeCoverageRelationStatistics Valid=1277, Invalid=4125, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 18:28:51,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6036 states. [2021-06-05 18:28:51,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6036 to 4413. [2021-06-05 18:28:51,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4413 states, 4412 states have (on average 2.777198549410698) internal successors, (12253), 4412 states have internal predecessors, (12253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:51,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4413 states to 4413 states and 12253 transitions. [2021-06-05 18:28:51,807 INFO L78 Accepts]: Start accepts. Automaton has 4413 states and 12253 transitions. Word has length 170 [2021-06-05 18:28:51,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:51,807 INFO L482 AbstractCegarLoop]: Abstraction has 4413 states and 12253 transitions. [2021-06-05 18:28:51,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:51,807 INFO L276 IsEmpty]: Start isEmpty. Operand 4413 states and 12253 transitions. [2021-06-05 18:28:51,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:28:51,810 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:51,811 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:52,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-06-05 18:28:52,011 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:52,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:52,011 INFO L82 PathProgramCache]: Analyzing trace with hash -703335439, now seen corresponding path program 385 times [2021-06-05 18:28:52,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:52,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964817023] [2021-06-05 18:28:52,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:52,343 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:52,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:52,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964817023] [2021-06-05 18:28:52,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964817023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:52,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070213252] [2021-06-05 18:28:52,343 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:52,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:52,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:28:52,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:52,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070213252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:52,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:52,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-05 18:28:52,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807880140] [2021-06-05 18:28:52,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:28:52,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:52,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:28:52,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:28:52,599 INFO L87 Difference]: Start difference. First operand 4413 states and 12253 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:53,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:53,566 INFO L93 Difference]: Finished difference Result 6331 states and 16292 transitions. [2021-06-05 18:28:53,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 18:28:53,566 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-05 18:28:53,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:53,572 INFO L225 Difference]: With dead ends: 6331 [2021-06-05 18:28:53,572 INFO L226 Difference]: Without dead ends: 6061 [2021-06-05 18:28:53,573 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 1042.0ms TimeCoverageRelationStatistics Valid=1400, Invalid=4606, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 18:28:53,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-06-05 18:28:53,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 4488. [2021-06-05 18:28:53,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4488 states, 4487 states have (on average 2.7809226654780477) internal successors, (12478), 4487 states have internal predecessors, (12478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:53,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4488 states to 4488 states and 12478 transitions. [2021-06-05 18:28:53,623 INFO L78 Accepts]: Start accepts. Automaton has 4488 states and 12478 transitions. Word has length 170 [2021-06-05 18:28:53,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:53,623 INFO L482 AbstractCegarLoop]: Abstraction has 4488 states and 12478 transitions. [2021-06-05 18:28:53,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:53,623 INFO L276 IsEmpty]: Start isEmpty. Operand 4488 states and 12478 transitions. [2021-06-05 18:28:53,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:28:53,627 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:53,627 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:53,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:53,827 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:53,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:53,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1814941055, now seen corresponding path program 386 times [2021-06-05 18:28:53,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:53,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254958808] [2021-06-05 18:28:53,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:53,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:54,188 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:54,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:54,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254958808] [2021-06-05 18:28:54,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254958808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:54,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859054820] [2021-06-05 18:28:54,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:54,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:28:54,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:54,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:28:54,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:54,436 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:54,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859054820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:54,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:54,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-05 18:28:54,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979678252] [2021-06-05 18:28:54,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:28:54,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:54,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:28:54,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:28:54,437 INFO L87 Difference]: Start difference. First operand 4488 states and 12478 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:55,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:55,258 INFO L93 Difference]: Finished difference Result 6356 states and 16417 transitions. [2021-06-05 18:28:55,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 18:28:55,258 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-05 18:28:55,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:55,263 INFO L225 Difference]: With dead ends: 6356 [2021-06-05 18:28:55,263 INFO L226 Difference]: Without dead ends: 6086 [2021-06-05 18:28:55,264 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 950.1ms TimeCoverageRelationStatistics Valid=1354, Invalid=4346, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 18:28:55,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6086 states. [2021-06-05 18:28:55,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6086 to 4563. [2021-06-05 18:28:55,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4563 states, 4562 states have (on average 2.7845243314335817) internal successors, (12703), 4562 states have internal predecessors, (12703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:55,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 12703 transitions. [2021-06-05 18:28:55,310 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 12703 transitions. Word has length 170 [2021-06-05 18:28:55,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:55,310 INFO L482 AbstractCegarLoop]: Abstraction has 4563 states and 12703 transitions. [2021-06-05 18:28:55,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:55,310 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 12703 transitions. [2021-06-05 18:28:55,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:28:55,313 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:55,313 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:55,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable394 [2021-06-05 18:28:55,514 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:55,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:55,514 INFO L82 PathProgramCache]: Analyzing trace with hash -380384657, now seen corresponding path program 387 times [2021-06-05 18:28:55,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:55,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524821438] [2021-06-05 18:28:55,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:55,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:55,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:55,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524821438] [2021-06-05 18:28:55,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524821438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:55,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225873520] [2021-06-05 18:28:55,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:55,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 18:28:55,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:55,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 18:28:55,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:56,080 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:56,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225873520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:56,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:56,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-05 18:28:56,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131597715] [2021-06-05 18:28:56,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:28:56,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:56,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:28:56,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:28:56,081 INFO L87 Difference]: Start difference. First operand 4563 states and 12703 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:57,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:57,059 INFO L93 Difference]: Finished difference Result 6381 states and 16542 transitions. [2021-06-05 18:28:57,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 18:28:57,059 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-05 18:28:57,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:57,065 INFO L225 Difference]: With dead ends: 6381 [2021-06-05 18:28:57,065 INFO L226 Difference]: Without dead ends: 6111 [2021-06-05 18:28:57,065 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 1020.8ms TimeCoverageRelationStatistics Valid=1333, Invalid=4673, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 18:28:57,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6111 states. [2021-06-05 18:28:57,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6111 to 4638. [2021-06-05 18:28:57,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4638 states, 4637 states have (on average 2.7880094888936813) internal successors, (12928), 4637 states have internal predecessors, (12928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:57,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4638 states to 4638 states and 12928 transitions. [2021-06-05 18:28:57,115 INFO L78 Accepts]: Start accepts. Automaton has 4638 states and 12928 transitions. Word has length 170 [2021-06-05 18:28:57,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:57,115 INFO L482 AbstractCegarLoop]: Abstraction has 4638 states and 12928 transitions. [2021-06-05 18:28:57,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:57,115 INFO L276 IsEmpty]: Start isEmpty. Operand 4638 states and 12928 transitions. [2021-06-05 18:28:57,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:28:57,118 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:57,118 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:57,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:57,319 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:57,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:57,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1129815421, now seen corresponding path program 388 times [2021-06-05 18:28:57,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:57,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528475827] [2021-06-05 18:28:57,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:57,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:57,632 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:57,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:57,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528475827] [2021-06-05 18:28:57,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528475827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:57,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059905858] [2021-06-05 18:28:57,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:57,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:28:57,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:57,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:28:57,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:57,877 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:57,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059905858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:57,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:57,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-05 18:28:57,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795799201] [2021-06-05 18:28:57,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:28:57,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:57,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:28:57,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:28:57,878 INFO L87 Difference]: Start difference. First operand 4638 states and 12928 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:58,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:58,775 INFO L93 Difference]: Finished difference Result 6406 states and 16667 transitions. [2021-06-05 18:28:58,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 18:28:58,775 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-05 18:28:58,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:58,781 INFO L225 Difference]: With dead ends: 6406 [2021-06-05 18:28:58,781 INFO L226 Difference]: Without dead ends: 6136 [2021-06-05 18:28:58,781 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 930.0ms TimeCoverageRelationStatistics Valid=1447, Invalid=4559, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 18:28:58,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6136 states. [2021-06-05 18:28:58,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6136 to 4713. [2021-06-05 18:28:58,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4713 states, 4712 states have (on average 2.791383701188455) internal successors, (13153), 4712 states have internal predecessors, (13153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:58,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4713 states to 4713 states and 13153 transitions. [2021-06-05 18:28:58,832 INFO L78 Accepts]: Start accepts. Automaton has 4713 states and 13153 transitions. Word has length 170 [2021-06-05 18:28:58,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:58,832 INFO L482 AbstractCegarLoop]: Abstraction has 4713 states and 13153 transitions. [2021-06-05 18:28:58,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:58,832 INFO L276 IsEmpty]: Start isEmpty. Operand 4713 states and 13153 transitions. [2021-06-05 18:28:58,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:28:58,835 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:58,835 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:28:59,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:59,042 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:59,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:59,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1769473645, now seen corresponding path program 389 times [2021-06-05 18:28:59,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:59,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781091879] [2021-06-05 18:28:59,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:59,336 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:59,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:59,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781091879] [2021-06-05 18:28:59,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781091879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:59,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633479949] [2021-06-05 18:28:59,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:59,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 18:28:59,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:59,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:28:59,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:59,603 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:59,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633479949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:59,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:59,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-05 18:28:59,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156089280] [2021-06-05 18:28:59,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:28:59,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:59,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:28:59,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:28:59,604 INFO L87 Difference]: Start difference. First operand 4713 states and 13153 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:00,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:00,680 INFO L93 Difference]: Finished difference Result 6431 states and 16792 transitions. [2021-06-05 18:29:00,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 18:29:00,680 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-05 18:29:00,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:00,686 INFO L225 Difference]: With dead ends: 6431 [2021-06-05 18:29:00,686 INFO L226 Difference]: Without dead ends: 6161 [2021-06-05 18:29:00,686 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1565 ImplicationChecksByTransitivity, 1118.6ms TimeCoverageRelationStatistics Valid=1586, Invalid=5056, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 18:29:00,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6161 states. [2021-06-05 18:29:00,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6161 to 4788. [2021-06-05 18:29:00,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4788 states, 4787 states have (on average 2.794652182995613) internal successors, (13378), 4787 states have internal predecessors, (13378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:00,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4788 states to 4788 states and 13378 transitions. [2021-06-05 18:29:00,735 INFO L78 Accepts]: Start accepts. Automaton has 4788 states and 13378 transitions. Word has length 170 [2021-06-05 18:29:00,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:00,735 INFO L482 AbstractCegarLoop]: Abstraction has 4788 states and 13378 transitions. [2021-06-05 18:29:00,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:00,735 INFO L276 IsEmpty]: Start isEmpty. Operand 4788 states and 13378 transitions. [2021-06-05 18:29:00,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:29:00,738 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:00,738 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:29:00,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:00,939 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:00,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:00,939 INFO L82 PathProgramCache]: Analyzing trace with hash 994554619, now seen corresponding path program 390 times [2021-06-05 18:29:00,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:00,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427073690] [2021-06-05 18:29:00,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:00,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:01,237 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:01,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:01,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427073690] [2021-06-05 18:29:01,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427073690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:01,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462756554] [2021-06-05 18:29:01,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:01,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 18:29:01,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:01,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:29:01,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:01,498 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:01,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462756554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:01,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:01,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-05 18:29:01,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333373630] [2021-06-05 18:29:01,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:29:01,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:01,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:29:01,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:29:01,499 INFO L87 Difference]: Start difference. First operand 4788 states and 13378 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:02,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:02,422 INFO L93 Difference]: Finished difference Result 6456 states and 16917 transitions. [2021-06-05 18:29:02,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 18:29:02,422 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-05 18:29:02,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:02,428 INFO L225 Difference]: With dead ends: 6456 [2021-06-05 18:29:02,428 INFO L226 Difference]: Without dead ends: 6186 [2021-06-05 18:29:02,429 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 944.2ms TimeCoverageRelationStatistics Valid=1556, Invalid=4764, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 18:29:02,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6186 states. [2021-06-05 18:29:02,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6186 to 4863. [2021-06-05 18:29:02,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4863 states, 4862 states have (on average 2.7978198272315917) internal successors, (13603), 4862 states have internal predecessors, (13603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:02,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4863 states to 4863 states and 13603 transitions. [2021-06-05 18:29:02,498 INFO L78 Accepts]: Start accepts. Automaton has 4863 states and 13603 transitions. Word has length 170 [2021-06-05 18:29:02,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:02,498 INFO L482 AbstractCegarLoop]: Abstraction has 4863 states and 13603 transitions. [2021-06-05 18:29:02,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:02,499 INFO L276 IsEmpty]: Start isEmpty. Operand 4863 states and 13603 transitions. [2021-06-05 18:29:02,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:29:02,502 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:02,502 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:29:02,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-05 18:29:02,712 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:02,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:02,712 INFO L82 PathProgramCache]: Analyzing trace with hash 540641259, now seen corresponding path program 391 times [2021-06-05 18:29:02,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:02,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660140794] [2021-06-05 18:29:02,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:02,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:03,001 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:03,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:03,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660140794] [2021-06-05 18:29:03,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660140794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:03,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891341379] [2021-06-05 18:29:03,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:03,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:03,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:29:03,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:03,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891341379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:03,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:03,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-05 18:29:03,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490027727] [2021-06-05 18:29:03,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:29:03,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:03,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:29:03,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:29:03,256 INFO L87 Difference]: Start difference. First operand 4863 states and 13603 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:04,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:04,432 INFO L93 Difference]: Finished difference Result 6481 states and 17042 transitions. [2021-06-05 18:29:04,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 18:29:04,433 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-05 18:29:04,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:04,439 INFO L225 Difference]: With dead ends: 6481 [2021-06-05 18:29:04,439 INFO L226 Difference]: Without dead ends: 6211 [2021-06-05 18:29:04,439 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1688 ImplicationChecksByTransitivity, 1188.5ms TimeCoverageRelationStatistics Valid=1703, Invalid=5269, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 18:29:04,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6211 states. [2021-06-05 18:29:04,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6211 to 4938. [2021-06-05 18:29:04,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4938 states, 4937 states have (on average 2.800891229491594) internal successors, (13828), 4937 states have internal predecessors, (13828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:04,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4938 states to 4938 states and 13828 transitions. [2021-06-05 18:29:04,492 INFO L78 Accepts]: Start accepts. Automaton has 4938 states and 13828 transitions. Word has length 170 [2021-06-05 18:29:04,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:04,492 INFO L482 AbstractCegarLoop]: Abstraction has 4938 states and 13828 transitions. [2021-06-05 18:29:04,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:04,492 INFO L276 IsEmpty]: Start isEmpty. Operand 4938 states and 13828 transitions. [2021-06-05 18:29:04,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:29:04,495 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:04,495 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:29:04,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable399,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:04,696 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:04,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:04,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1418653177, now seen corresponding path program 392 times [2021-06-05 18:29:04,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:04,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701679904] [2021-06-05 18:29:04,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:04,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:04,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701679904] [2021-06-05 18:29:04,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701679904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:04,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165825403] [2021-06-05 18:29:04,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:05,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:29:05,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:05,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:29:05,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:05,240 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:05,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165825403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:05,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:05,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-05 18:29:05,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830624634] [2021-06-05 18:29:05,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:29:05,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:05,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:29:05,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:29:05,241 INFO L87 Difference]: Start difference. First operand 4938 states and 13828 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:06,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:06,227 INFO L93 Difference]: Finished difference Result 6506 states and 17167 transitions. [2021-06-05 18:29:06,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 18:29:06,227 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-05 18:29:06,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:06,233 INFO L225 Difference]: With dead ends: 6506 [2021-06-05 18:29:06,233 INFO L226 Difference]: Without dead ends: 6236 [2021-06-05 18:29:06,233 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 970.6ms TimeCoverageRelationStatistics Valid=1681, Invalid=4961, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 18:29:06,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6236 states. [2021-06-05 18:29:06,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6236 to 5013. [2021-06-05 18:29:06,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5013 states, 5012 states have (on average 2.8038707102952913) internal successors, (14053), 5012 states have internal predecessors, (14053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:06,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5013 states to 5013 states and 14053 transitions. [2021-06-05 18:29:06,288 INFO L78 Accepts]: Start accepts. Automaton has 5013 states and 14053 transitions. Word has length 170 [2021-06-05 18:29:06,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:06,288 INFO L482 AbstractCegarLoop]: Abstraction has 5013 states and 14053 transitions. [2021-06-05 18:29:06,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:06,288 INFO L276 IsEmpty]: Start isEmpty. Operand 5013 states and 14053 transitions. [2021-06-05 18:29:06,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:29:06,292 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:06,292 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:29:06,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-05 18:29:06,492 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:06,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:06,492 INFO L82 PathProgramCache]: Analyzing trace with hash 518598377, now seen corresponding path program 393 times [2021-06-05 18:29:06,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:06,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285038315] [2021-06-05 18:29:06,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:06,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:06,781 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:06,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:06,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285038315] [2021-06-05 18:29:06,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285038315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:06,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197092017] [2021-06-05 18:29:06,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:06,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 18:29:06,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:06,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 18:29:06,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:07,084 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:07,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197092017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:07,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:07,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-05 18:29:07,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208999512] [2021-06-05 18:29:07,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:29:07,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:07,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:29:07,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:29:07,085 INFO L87 Difference]: Start difference. First operand 5013 states and 14053 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:08,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:08,225 INFO L93 Difference]: Finished difference Result 6531 states and 17292 transitions. [2021-06-05 18:29:08,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 18:29:08,226 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-05 18:29:08,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:08,231 INFO L225 Difference]: With dead ends: 6531 [2021-06-05 18:29:08,231 INFO L226 Difference]: Without dead ends: 6261 [2021-06-05 18:29:08,231 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1665 ImplicationChecksByTransitivity, 1140.7ms TimeCoverageRelationStatistics Valid=1603, Invalid=5369, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 18:29:08,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6261 states. [2021-06-05 18:29:08,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6261 to 5088. [2021-06-05 18:29:08,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5088 states, 5087 states have (on average 2.806762335364655) internal successors, (14278), 5087 states have internal predecessors, (14278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:08,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5088 states to 5088 states and 14278 transitions. [2021-06-05 18:29:08,283 INFO L78 Accepts]: Start accepts. Automaton has 5088 states and 14278 transitions. Word has length 170 [2021-06-05 18:29:08,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:08,283 INFO L482 AbstractCegarLoop]: Abstraction has 5088 states and 14278 transitions. [2021-06-05 18:29:08,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:08,283 INFO L276 IsEmpty]: Start isEmpty. Operand 5088 states and 14278 transitions. [2021-06-05 18:29:08,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:29:08,287 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:08,287 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:29:08,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-06-05 18:29:08,487 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:08,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:08,488 INFO L82 PathProgramCache]: Analyzing trace with hash 89534071, now seen corresponding path program 394 times [2021-06-05 18:29:08,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:08,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984005107] [2021-06-05 18:29:08,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:08,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:08,770 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:08,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:08,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984005107] [2021-06-05 18:29:08,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984005107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:08,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113072803] [2021-06-05 18:29:08,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:08,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:29:08,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:08,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:29:08,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:09,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113072803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:09,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:09,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-05 18:29:09,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972499977] [2021-06-05 18:29:09,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:29:09,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:09,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:29:09,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:29:09,016 INFO L87 Difference]: Start difference. First operand 5088 states and 14278 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:10,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:10,007 INFO L93 Difference]: Finished difference Result 6556 states and 17417 transitions. [2021-06-05 18:29:10,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 18:29:10,007 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-05 18:29:10,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:10,013 INFO L225 Difference]: With dead ends: 6556 [2021-06-05 18:29:10,013 INFO L226 Difference]: Without dead ends: 6286 [2021-06-05 18:29:10,014 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1774 ImplicationChecksByTransitivity, 1008.9ms TimeCoverageRelationStatistics Valid=1822, Invalid=5150, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 18:29:10,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6286 states. [2021-06-05 18:29:10,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6286 to 5163. [2021-06-05 18:29:10,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5163 states, 5162 states have (on average 2.8095699341340565) internal successors, (14503), 5162 states have internal predecessors, (14503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:10,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5163 states to 5163 states and 14503 transitions. [2021-06-05 18:29:10,069 INFO L78 Accepts]: Start accepts. Automaton has 5163 states and 14503 transitions. Word has length 170 [2021-06-05 18:29:10,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:10,070 INFO L482 AbstractCegarLoop]: Abstraction has 5163 states and 14503 transitions. [2021-06-05 18:29:10,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:10,070 INFO L276 IsEmpty]: Start isEmpty. Operand 5163 states and 14503 transitions. [2021-06-05 18:29:10,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:29:10,073 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:10,073 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:29:10,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable402,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:10,274 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:10,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:10,274 INFO L82 PathProgramCache]: Analyzing trace with hash -596649113, now seen corresponding path program 395 times [2021-06-05 18:29:10,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:10,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977844875] [2021-06-05 18:29:10,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:10,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:10,586 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:10,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:10,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977844875] [2021-06-05 18:29:10,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977844875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:10,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523826127] [2021-06-05 18:29:10,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:10,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 18:29:10,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:10,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:29:10,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:10,842 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:10,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523826127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:10,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:10,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-05 18:29:10,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974723752] [2021-06-05 18:29:10,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:29:10,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:10,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:29:10,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:29:10,843 INFO L87 Difference]: Start difference. First operand 5163 states and 14503 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:12,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:12,097 INFO L93 Difference]: Finished difference Result 6581 states and 17542 transitions. [2021-06-05 18:29:12,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 18:29:12,097 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-05 18:29:12,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:12,104 INFO L225 Difference]: With dead ends: 6581 [2021-06-05 18:29:12,104 INFO L226 Difference]: Without dead ends: 6311 [2021-06-05 18:29:12,105 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1946 ImplicationChecksByTransitivity, 1268.1ms TimeCoverageRelationStatistics Valid=1985, Invalid=5671, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 18:29:12,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6311 states. [2021-06-05 18:29:12,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6311 to 5238. [2021-06-05 18:29:12,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5238 states, 5237 states have (on average 2.812297116669849) internal successors, (14728), 5237 states have internal predecessors, (14728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:12,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5238 states to 5238 states and 14728 transitions. [2021-06-05 18:29:12,161 INFO L78 Accepts]: Start accepts. Automaton has 5238 states and 14728 transitions. Word has length 170 [2021-06-05 18:29:12,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:12,162 INFO L482 AbstractCegarLoop]: Abstraction has 5238 states and 14728 transitions. [2021-06-05 18:29:12,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:12,162 INFO L276 IsEmpty]: Start isEmpty. Operand 5238 states and 14728 transitions. [2021-06-05 18:29:12,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:29:12,165 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:12,165 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:29:12,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-06-05 18:29:12,366 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:12,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:12,366 INFO L82 PathProgramCache]: Analyzing trace with hash -681683851, now seen corresponding path program 396 times [2021-06-05 18:29:12,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:12,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394374354] [2021-06-05 18:29:12,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:12,650 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:12,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:12,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394374354] [2021-06-05 18:29:12,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394374354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:12,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523129947] [2021-06-05 18:29:12,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:12,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 18:29:12,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:12,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 18:29:12,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:12,897 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:12,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523129947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:12,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:12,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-05 18:29:12,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280075414] [2021-06-05 18:29:12,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:29:12,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:12,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:29:12,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:29:12,898 INFO L87 Difference]: Start difference. First operand 5238 states and 14728 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:13,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:13,968 INFO L93 Difference]: Finished difference Result 6606 states and 17667 transitions. [2021-06-05 18:29:13,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 18:29:13,969 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-05 18:29:13,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:13,975 INFO L225 Difference]: With dead ends: 6606 [2021-06-05 18:29:13,975 INFO L226 Difference]: Without dead ends: 6336 [2021-06-05 18:29:13,976 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 1060.4ms TimeCoverageRelationStatistics Valid=1979, Invalid=5331, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 18:29:13,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6336 states. [2021-06-05 18:29:14,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6336 to 5313. [2021-06-05 18:29:14,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5313 states, 5312 states have (on average 2.8149472891566263) internal successors, (14953), 5312 states have internal predecessors, (14953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:14,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5313 states to 5313 states and 14953 transitions. [2021-06-05 18:29:14,032 INFO L78 Accepts]: Start accepts. Automaton has 5313 states and 14953 transitions. Word has length 170 [2021-06-05 18:29:14,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:14,032 INFO L482 AbstractCegarLoop]: Abstraction has 5313 states and 14953 transitions. [2021-06-05 18:29:14,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:14,032 INFO L276 IsEmpty]: Start isEmpty. Operand 5313 states and 14953 transitions. [2021-06-05 18:29:14,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:29:14,036 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:14,036 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:29:14,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-06-05 18:29:14,236 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:14,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:14,236 INFO L82 PathProgramCache]: Analyzing trace with hash -749834907, now seen corresponding path program 397 times [2021-06-05 18:29:14,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:14,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630463360] [2021-06-05 18:29:14,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:14,520 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:14,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:14,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630463360] [2021-06-05 18:29:14,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630463360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:14,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274786076] [2021-06-05 18:29:14,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:14,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:29:14,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:14,770 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:14,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274786076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:14,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:14,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-05 18:29:14,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240210574] [2021-06-05 18:29:14,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:29:14,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:14,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:29:14,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=919, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:29:14,771 INFO L87 Difference]: Start difference. First operand 5313 states and 14953 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:16,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:16,110 INFO L93 Difference]: Finished difference Result 6631 states and 17792 transitions. [2021-06-05 18:29:16,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 18:29:16,110 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-05 18:29:16,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:16,115 INFO L225 Difference]: With dead ends: 6631 [2021-06-05 18:29:16,115 INFO L226 Difference]: Without dead ends: 6361 [2021-06-05 18:29:16,115 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 1308.8ms TimeCoverageRelationStatistics Valid=2150, Invalid=5860, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 18:29:16,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6361 states. [2021-06-05 18:29:16,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6361 to 5388. [2021-06-05 18:29:16,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5388 states, 5387 states have (on average 2.817523668089846) internal successors, (15178), 5387 states have internal predecessors, (15178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:16,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5388 states to 5388 states and 15178 transitions. [2021-06-05 18:29:16,171 INFO L78 Accepts]: Start accepts. Automaton has 5388 states and 15178 transitions. Word has length 170 [2021-06-05 18:29:16,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:16,171 INFO L482 AbstractCegarLoop]: Abstraction has 5388 states and 15178 transitions. [2021-06-05 18:29:16,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:16,171 INFO L276 IsEmpty]: Start isEmpty. Operand 5388 states and 15178 transitions. [2021-06-05 18:29:16,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:29:16,175 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:16,175 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:29:16,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:16,376 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:16,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:16,376 INFO L82 PathProgramCache]: Analyzing trace with hash -2046803981, now seen corresponding path program 398 times [2021-06-05 18:29:16,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:16,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783115086] [2021-06-05 18:29:16,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:16,661 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:16,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:16,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783115086] [2021-06-05 18:29:16,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783115086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:16,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783392979] [2021-06-05 18:29:16,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:16,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:29:16,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:16,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:29:16,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:16,905 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:16,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783392979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:16,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:16,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-05 18:29:16,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406786066] [2021-06-05 18:29:16,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:29:16,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:16,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:29:16,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=834, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:29:16,906 INFO L87 Difference]: Start difference. First operand 5388 states and 15178 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:18,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:18,013 INFO L93 Difference]: Finished difference Result 6656 states and 17917 transitions. [2021-06-05 18:29:18,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 18:29:18,013 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-05 18:29:18,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:18,020 INFO L225 Difference]: With dead ends: 6656 [2021-06-05 18:29:18,020 INFO L226 Difference]: Without dead ends: 6386 [2021-06-05 18:29:18,021 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2034 ImplicationChecksByTransitivity, 1098.5ms TimeCoverageRelationStatistics Valid=2152, Invalid=5504, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 18:29:18,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6386 states. [2021-06-05 18:29:18,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6386 to 5463. [2021-06-05 18:29:18,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5463 states, 5462 states have (on average 2.8200292932991577) internal successors, (15403), 5462 states have internal predecessors, (15403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:18,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5463 states to 5463 states and 15403 transitions. [2021-06-05 18:29:18,078 INFO L78 Accepts]: Start accepts. Automaton has 5463 states and 15403 transitions. Word has length 170 [2021-06-05 18:29:18,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:18,078 INFO L482 AbstractCegarLoop]: Abstraction has 5463 states and 15403 transitions. [2021-06-05 18:29:18,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:18,078 INFO L276 IsEmpty]: Start isEmpty. Operand 5463 states and 15403 transitions. [2021-06-05 18:29:18,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:29:18,082 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:18,082 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:29:18,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:18,282 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:18,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:18,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1617050397, now seen corresponding path program 399 times [2021-06-05 18:29:18,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:18,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413765469] [2021-06-05 18:29:18,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:18,612 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:18,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:18,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413765469] [2021-06-05 18:29:18,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413765469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:18,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556406424] [2021-06-05 18:29:18,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:18,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 18:29:18,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:18,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:29:18,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:18,873 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:18,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556406424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:18,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:18,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-05 18:29:18,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214237298] [2021-06-05 18:29:18,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:29:18,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:18,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:29:18,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=898, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:29:18,874 INFO L87 Difference]: Start difference. First operand 5463 states and 15403 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:20,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:20,156 INFO L93 Difference]: Finished difference Result 6741 states and 18207 transitions. [2021-06-05 18:29:20,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 18:29:20,156 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-05 18:29:20,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:20,163 INFO L225 Difference]: With dead ends: 6741 [2021-06-05 18:29:20,163 INFO L226 Difference]: Without dead ends: 6471 [2021-06-05 18:29:20,164 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2031 ImplicationChecksByTransitivity, 1293.9ms TimeCoverageRelationStatistics Valid=1990, Invalid=6020, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 18:29:20,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6471 states. [2021-06-05 18:29:20,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6471 to 5538. [2021-06-05 18:29:20,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5538 states, 5537 states have (on average 2.826079104208055) internal successors, (15648), 5537 states have internal predecessors, (15648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:20,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5538 states to 5538 states and 15648 transitions. [2021-06-05 18:29:20,225 INFO L78 Accepts]: Start accepts. Automaton has 5538 states and 15648 transitions. Word has length 170 [2021-06-05 18:29:20,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:20,225 INFO L482 AbstractCegarLoop]: Abstraction has 5538 states and 15648 transitions. [2021-06-05 18:29:20,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:20,225 INFO L276 IsEmpty]: Start isEmpty. Operand 5538 states and 15648 transitions. [2021-06-05 18:29:20,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:29:20,229 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:20,229 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:29:20,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:20,430 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:20,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:20,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1674784527, now seen corresponding path program 400 times [2021-06-05 18:29:20,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:20,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825982194] [2021-06-05 18:29:20,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:20,725 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:20,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:20,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825982194] [2021-06-05 18:29:20,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825982194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:20,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358295950] [2021-06-05 18:29:20,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:20,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:29:20,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:20,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:29:20,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:20,956 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:20,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358295950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:20,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:20,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-05 18:29:20,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482399005] [2021-06-05 18:29:20,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:29:20,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:20,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:29:20,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=810, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:29:20,957 INFO L87 Difference]: Start difference. First operand 5538 states and 15648 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:22,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:22,116 INFO L93 Difference]: Finished difference Result 7508 states and 20381 transitions. [2021-06-05 18:29:22,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 18:29:22,116 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-05 18:29:22,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:22,123 INFO L225 Difference]: With dead ends: 7508 [2021-06-05 18:29:22,123 INFO L226 Difference]: Without dead ends: 7238 [2021-06-05 18:29:22,124 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2169 ImplicationChecksByTransitivity, 1132.5ms TimeCoverageRelationStatistics Valid=2342, Invalid=5668, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 18:29:22,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7238 states. [2021-06-05 18:29:22,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7238 to 5718. [2021-06-05 18:29:22,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5718 states, 5717 states have (on average 2.8348784327444463) internal successors, (16207), 5717 states have internal predecessors, (16207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:22,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5718 states to 5718 states and 16207 transitions. [2021-06-05 18:29:22,183 INFO L78 Accepts]: Start accepts. Automaton has 5718 states and 16207 transitions. Word has length 170 [2021-06-05 18:29:22,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:22,183 INFO L482 AbstractCegarLoop]: Abstraction has 5718 states and 16207 transitions. [2021-06-05 18:29:22,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:22,183 INFO L276 IsEmpty]: Start isEmpty. Operand 5718 states and 16207 transitions. [2021-06-05 18:29:22,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:29:22,187 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:22,187 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:29:22,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:22,387 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:22,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:22,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1652441277, now seen corresponding path program 401 times [2021-06-05 18:29:22,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:22,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880331453] [2021-06-05 18:29:22,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:22,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:22,676 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:22,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:22,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880331453] [2021-06-05 18:29:22,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880331453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:22,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402208799] [2021-06-05 18:29:22,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:22,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 18:29:22,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:22,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:29:22,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:22,940 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:22,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402208799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:22,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:22,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2021-06-05 18:29:22,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318083348] [2021-06-05 18:29:22,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:29:22,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:22,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:29:22,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:29:22,941 INFO L87 Difference]: Start difference. First operand 5718 states and 16207 transitions. Second operand has 35 states, 35 states have (on average 4.942857142857143) internal successors, (173), 35 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:24,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:24,418 INFO L93 Difference]: Finished difference Result 7451 states and 20241 transitions. [2021-06-05 18:29:24,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 18:29:24,418 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.942857142857143) internal successors, (173), 35 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-05 18:29:24,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:24,425 INFO L225 Difference]: With dead ends: 7451 [2021-06-05 18:29:24,425 INFO L226 Difference]: Without dead ends: 6876 [2021-06-05 18:29:24,426 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2604 ImplicationChecksByTransitivity, 1475.0ms TimeCoverageRelationStatistics Valid=2617, Invalid=6889, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 18:29:24,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6876 states. [2021-06-05 18:29:24,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6876 to 5753. [2021-06-05 18:29:24,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:24,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-05 18:29:24,484 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 170 [2021-06-05 18:29:24,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:24,484 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-05 18:29:24,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 4.942857142857143) internal successors, (173), 35 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:24,485 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-05 18:29:24,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:29:24,489 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:24,489 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:29:24,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,405 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:24,689 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:24,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:24,689 INFO L82 PathProgramCache]: Analyzing trace with hash 420129948, now seen corresponding path program 402 times [2021-06-05 18:29:24,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:24,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111834945] [2021-06-05 18:29:24,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:24,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:25,051 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:25,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:25,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111834945] [2021-06-05 18:29:25,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111834945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:25,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509076741] [2021-06-05 18:29:25,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:25,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 18:29:25,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:25,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:29:25,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:25,347 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:25,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509076741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:25,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:25,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-05 18:29:25,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259412379] [2021-06-05 18:29:25,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:29:25,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:25,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:29:25,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=925, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:29:25,348 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:26,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:26,023 INFO L93 Difference]: Finished difference Result 7496 states and 19897 transitions. [2021-06-05 18:29:26,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:29:26,023 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:29:26,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:26,031 INFO L225 Difference]: With dead ends: 7496 [2021-06-05 18:29:26,031 INFO L226 Difference]: Without dead ends: 7226 [2021-06-05 18:29:26,032 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 821.3ms TimeCoverageRelationStatistics Valid=1270, Invalid=3422, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 18:29:26,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7226 states. [2021-06-05 18:29:26,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7226 to 5753. [2021-06-05 18:29:26,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:26,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-05 18:29:26,094 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-05 18:29:26,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:26,094 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-05 18:29:26,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:26,095 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-05 18:29:26,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:29:26,099 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:26,099 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:29:26,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-05 18:29:26,300 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:26,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:26,300 INFO L82 PathProgramCache]: Analyzing trace with hash -520806004, now seen corresponding path program 403 times [2021-06-05 18:29:26,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:26,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640810477] [2021-06-05 18:29:26,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:26,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:26,768 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:26,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:26,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640810477] [2021-06-05 18:29:26,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640810477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:26,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983765706] [2021-06-05 18:29:26,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:26,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:29:26,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:27,083 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:27,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983765706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:27,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:27,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-05 18:29:27,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111794421] [2021-06-05 18:29:27,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:29:27,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:27,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:29:27,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:29:27,085 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:27,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:27,796 INFO L93 Difference]: Finished difference Result 8141 states and 21187 transitions. [2021-06-05 18:29:27,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 18:29:27,797 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:29:27,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:27,805 INFO L225 Difference]: With dead ends: 8141 [2021-06-05 18:29:27,805 INFO L226 Difference]: Without dead ends: 7871 [2021-06-05 18:29:27,805 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 931.7ms TimeCoverageRelationStatistics Valid=1340, Invalid=3772, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 18:29:27,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7871 states. [2021-06-05 18:29:27,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7871 to 5753. [2021-06-05 18:29:27,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:27,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-05 18:29:27,870 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-05 18:29:27,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:27,870 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-05 18:29:27,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:27,870 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-05 18:29:27,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:29:27,874 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:27,874 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:29:28,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 18:29:28,075 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:28,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:28,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1110522778, now seen corresponding path program 404 times [2021-06-05 18:29:28,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:28,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166762036] [2021-06-05 18:29:28,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:28,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:28,426 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:28,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:28,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166762036] [2021-06-05 18:29:28,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166762036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:28,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788432698] [2021-06-05 18:29:28,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:28,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:29:28,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:28,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:29:28,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:28,719 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:28,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788432698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:28,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:28,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-05 18:29:28,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519767332] [2021-06-05 18:29:28,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:29:28,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:28,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:29:28,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=949, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:29:28,720 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:29,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:29,420 INFO L93 Difference]: Finished difference Result 8096 states and 21097 transitions. [2021-06-05 18:29:29,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:29:29,420 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:29:29,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:29,428 INFO L225 Difference]: With dead ends: 8096 [2021-06-05 18:29:29,428 INFO L226 Difference]: Without dead ends: 7826 [2021-06-05 18:29:29,429 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 844.2ms TimeCoverageRelationStatistics Valid=1328, Invalid=3784, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 18:29:29,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7826 states. [2021-06-05 18:29:29,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7826 to 5753. [2021-06-05 18:29:29,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:29,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-05 18:29:29,491 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-05 18:29:29,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:29,491 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-05 18:29:29,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:29,491 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-05 18:29:29,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:29:29,495 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:29,495 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:29:29,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:29,696 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:29,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:29,696 INFO L82 PathProgramCache]: Analyzing trace with hash 265034890, now seen corresponding path program 405 times [2021-06-05 18:29:29,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:29,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277149648] [2021-06-05 18:29:29,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:30,056 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:30,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:30,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277149648] [2021-06-05 18:29:30,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277149648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:30,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263082912] [2021-06-05 18:29:30,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:30,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 18:29:30,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:30,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:29:30,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:30,372 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:30,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263082912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:30,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:30,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-05 18:29:30,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438448052] [2021-06-05 18:29:30,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:29:30,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:30,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:29:30,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:29:30,373 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:31,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:31,148 INFO L93 Difference]: Finished difference Result 8046 states and 20997 transitions. [2021-06-05 18:29:31,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:29:31,148 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:29:31,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:31,156 INFO L225 Difference]: With dead ends: 8046 [2021-06-05 18:29:31,156 INFO L226 Difference]: Without dead ends: 7776 [2021-06-05 18:29:31,157 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 923.9ms TimeCoverageRelationStatistics Valid=1351, Invalid=4051, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 18:29:31,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7776 states. [2021-06-05 18:29:31,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7776 to 5753. [2021-06-05 18:29:31,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:31,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-05 18:29:31,219 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-05 18:29:31,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:31,219 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-05 18:29:31,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:31,219 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-05 18:29:31,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:29:31,223 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:31,223 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:29:31,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-06-05 18:29:31,424 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:31,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:31,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1640968168, now seen corresponding path program 406 times [2021-06-05 18:29:31,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:31,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260063704] [2021-06-05 18:29:31,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:31,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:31,824 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:31,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:31,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260063704] [2021-06-05 18:29:31,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260063704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:31,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728667285] [2021-06-05 18:29:31,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:31,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:29:31,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:31,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:29:31,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:32,099 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:32,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728667285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:32,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:32,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-05 18:29:32,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598970922] [2021-06-05 18:29:32,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:29:32,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:32,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:29:32,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=969, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:29:32,100 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:32,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:32,921 INFO L93 Difference]: Finished difference Result 7996 states and 20897 transitions. [2021-06-05 18:29:32,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:29:32,921 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:29:32,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:32,929 INFO L225 Difference]: With dead ends: 7996 [2021-06-05 18:29:32,929 INFO L226 Difference]: Without dead ends: 7726 [2021-06-05 18:29:32,929 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 934.4ms TimeCoverageRelationStatistics Valid=1353, Invalid=4049, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 18:29:32,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7726 states. [2021-06-05 18:29:32,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7726 to 5753. [2021-06-05 18:29:32,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:32,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-05 18:29:32,987 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-05 18:29:32,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:32,987 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-05 18:29:32,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:32,987 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-05 18:29:32,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:29:32,991 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:32,991 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:29:33,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-06-05 18:29:33,191 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:33,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:33,192 INFO L82 PathProgramCache]: Analyzing trace with hash -757916408, now seen corresponding path program 407 times [2021-06-05 18:29:33,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:33,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237295561] [2021-06-05 18:29:33,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:33,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:33,582 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:33,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:33,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237295561] [2021-06-05 18:29:33,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237295561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:33,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162767858] [2021-06-05 18:29:33,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:33,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 18:29:33,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:33,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:29:33,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:33,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162767858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:33,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:33,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-05 18:29:33,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513694871] [2021-06-05 18:29:33,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:29:33,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:33,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:29:33,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1047, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:29:33,888 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:34,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:34,764 INFO L93 Difference]: Finished difference Result 7946 states and 20797 transitions. [2021-06-05 18:29:34,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:29:34,765 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:29:34,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:34,772 INFO L225 Difference]: With dead ends: 7946 [2021-06-05 18:29:34,772 INFO L226 Difference]: Without dead ends: 7676 [2021-06-05 18:29:34,773 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 1014.6ms TimeCoverageRelationStatistics Valid=1378, Invalid=4322, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 18:29:34,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7676 states. [2021-06-05 18:29:34,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7676 to 5753. [2021-06-05 18:29:34,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:34,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-05 18:29:34,835 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-05 18:29:34,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:34,836 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-05 18:29:34,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:34,836 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-05 18:29:34,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:29:34,840 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:34,840 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:29:35,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-06-05 18:29:35,052 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:35,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:35,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1644841494, now seen corresponding path program 408 times [2021-06-05 18:29:35,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:35,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96922519] [2021-06-05 18:29:35,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:35,431 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:35,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:35,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96922519] [2021-06-05 18:29:35,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96922519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:35,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381223649] [2021-06-05 18:29:35,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:35,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 18:29:35,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:35,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:29:35,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:35,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381223649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:35,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:35,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-05 18:29:35,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359992001] [2021-06-05 18:29:35,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:29:35,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:35,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:29:35,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:29:35,734 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:36,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:36,524 INFO L93 Difference]: Finished difference Result 7896 states and 20697 transitions. [2021-06-05 18:29:36,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:29:36,524 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:29:36,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:36,533 INFO L225 Difference]: With dead ends: 7896 [2021-06-05 18:29:36,533 INFO L226 Difference]: Without dead ends: 7626 [2021-06-05 18:29:36,533 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1279 ImplicationChecksByTransitivity, 926.6ms TimeCoverageRelationStatistics Valid=1394, Invalid=4306, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 18:29:36,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7626 states. [2021-06-05 18:29:36,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7626 to 5753. [2021-06-05 18:29:36,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:36,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-05 18:29:36,599 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-05 18:29:36,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:36,599 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-05 18:29:36,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:36,599 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-05 18:29:36,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:29:36,604 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:36,604 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:29:36,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-06-05 18:29:36,804 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:36,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:36,804 INFO L82 PathProgramCache]: Analyzing trace with hash -808779002, now seen corresponding path program 409 times [2021-06-05 18:29:36,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:36,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212395046] [2021-06-05 18:29:36,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:36,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:37,204 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:37,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:37,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212395046] [2021-06-05 18:29:37,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212395046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:37,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99661819] [2021-06-05 18:29:37,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:37,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:37,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:29:37,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:37,521 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:37,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99661819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:37,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:37,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-05 18:29:37,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572427124] [2021-06-05 18:29:37,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:29:37,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:37,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:29:37,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1062, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:29:37,522 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:38,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:38,417 INFO L93 Difference]: Finished difference Result 7846 states and 20597 transitions. [2021-06-05 18:29:38,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 18:29:38,418 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:29:38,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:38,425 INFO L225 Difference]: With dead ends: 7846 [2021-06-05 18:29:38,425 INFO L226 Difference]: Without dead ends: 7576 [2021-06-05 18:29:38,425 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 997.8ms TimeCoverageRelationStatistics Valid=1421, Invalid=4585, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 18:29:38,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7576 states. [2021-06-05 18:29:38,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7576 to 5753. [2021-06-05 18:29:38,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:38,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-05 18:29:38,481 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-05 18:29:38,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:38,481 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-05 18:29:38,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:38,481 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-05 18:29:38,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:29:38,485 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:38,485 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:29:38,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:38,686 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:38,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:38,686 INFO L82 PathProgramCache]: Analyzing trace with hash 72780180, now seen corresponding path program 410 times [2021-06-05 18:29:38,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:38,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843669458] [2021-06-05 18:29:38,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:38,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:39,008 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:39,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:39,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843669458] [2021-06-05 18:29:39,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843669458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:39,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561498662] [2021-06-05 18:29:39,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:39,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:29:39,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:39,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:29:39,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:39,287 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:39,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561498662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:39,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:39,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-05 18:29:39,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198544826] [2021-06-05 18:29:39,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:29:39,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:39,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:29:39,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:29:39,288 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:40,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:40,167 INFO L93 Difference]: Finished difference Result 7796 states and 20497 transitions. [2021-06-05 18:29:40,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 18:29:40,168 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:29:40,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:40,175 INFO L225 Difference]: With dead ends: 7796 [2021-06-05 18:29:40,175 INFO L226 Difference]: Without dead ends: 7526 [2021-06-05 18:29:40,176 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 903.6ms TimeCoverageRelationStatistics Valid=1451, Invalid=4555, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 18:29:40,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7526 states. [2021-06-05 18:29:40,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7526 to 5753. [2021-06-05 18:29:40,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:40,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-05 18:29:40,232 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-05 18:29:40,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:40,233 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-05 18:29:40,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:40,233 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-05 18:29:40,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:29:40,237 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:40,237 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:29:40,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-06-05 18:29:40,437 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:40,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:40,437 INFO L82 PathProgramCache]: Analyzing trace with hash -569594236, now seen corresponding path program 411 times [2021-06-05 18:29:40,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:40,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680343437] [2021-06-05 18:29:40,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:40,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:40,769 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:40,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:40,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680343437] [2021-06-05 18:29:40,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680343437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:40,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734203992] [2021-06-05 18:29:40,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:40,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 18:29:40,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:40,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 54 conjunts are in the unsatisfiable core [2021-06-05 18:29:40,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:41,063 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:41,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734203992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:41,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:41,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-05 18:29:41,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774513382] [2021-06-05 18:29:41,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:29:41,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:41,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:29:41,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1073, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:29:41,064 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:42,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:42,015 INFO L93 Difference]: Finished difference Result 7746 states and 20397 transitions. [2021-06-05 18:29:42,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 18:29:42,016 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:29:42,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:42,021 INFO L225 Difference]: With dead ends: 7746 [2021-06-05 18:29:42,021 INFO L226 Difference]: Without dead ends: 7476 [2021-06-05 18:29:42,022 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 1018.7ms TimeCoverageRelationStatistics Valid=1447, Invalid=4873, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 18:29:42,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7476 states. [2021-06-05 18:29:42,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7476 to 5753. [2021-06-05 18:29:42,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:42,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-05 18:29:42,073 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-05 18:29:42,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:42,073 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-05 18:29:42,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:42,074 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-05 18:29:42,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:29:42,077 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:42,077 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:29:42,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2021-06-05 18:29:42,278 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:42,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:42,278 INFO L82 PathProgramCache]: Analyzing trace with hash -616141166, now seen corresponding path program 412 times [2021-06-05 18:29:42,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:42,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681062232] [2021-06-05 18:29:42,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:42,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:42,591 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:42,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:42,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681062232] [2021-06-05 18:29:42,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681062232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:42,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761036144] [2021-06-05 18:29:42,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:42,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:29:42,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:42,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:29:42,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:42,863 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:42,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761036144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:42,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:42,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-05 18:29:42,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001982289] [2021-06-05 18:29:42,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:29:42,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:42,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:29:42,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:29:42,864 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:43,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:43,704 INFO L93 Difference]: Finished difference Result 7696 states and 20297 transitions. [2021-06-05 18:29:43,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 18:29:43,705 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:29:43,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:43,712 INFO L225 Difference]: With dead ends: 7696 [2021-06-05 18:29:43,712 INFO L226 Difference]: Without dead ends: 7426 [2021-06-05 18:29:43,713 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 928.0ms TimeCoverageRelationStatistics Valid=1524, Invalid=4796, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 18:29:43,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7426 states. [2021-06-05 18:29:43,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7426 to 5753. [2021-06-05 18:29:43,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:43,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-05 18:29:43,768 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-05 18:29:43,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:43,768 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-05 18:29:43,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:43,768 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-05 18:29:43,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:29:43,772 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:43,772 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:29:43,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 416 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-06-05 18:29:43,973 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:43,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:43,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1534525566, now seen corresponding path program 413 times [2021-06-05 18:29:43,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:43,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918691543] [2021-06-05 18:29:43,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:43,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:44,295 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:44,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:44,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918691543] [2021-06-05 18:29:44,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918691543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:44,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369712522] [2021-06-05 18:29:44,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:44,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 18:29:44,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:44,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:29:44,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:44,614 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:44,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369712522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:44,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:44,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-05 18:29:44,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086143176] [2021-06-05 18:29:44,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:29:44,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:44,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:29:44,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1080, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:29:44,615 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:45,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:45,619 INFO L93 Difference]: Finished difference Result 7646 states and 20197 transitions. [2021-06-05 18:29:45,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 18:29:45,619 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:29:45,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:45,626 INFO L225 Difference]: With dead ends: 7646 [2021-06-05 18:29:45,626 INFO L226 Difference]: Without dead ends: 7376 [2021-06-05 18:29:45,627 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1556 ImplicationChecksByTransitivity, 1104.0ms TimeCoverageRelationStatistics Valid=1555, Invalid=5087, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 18:29:45,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7376 states. [2021-06-05 18:29:45,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7376 to 5753. [2021-06-05 18:29:45,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:45,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-05 18:29:45,684 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-05 18:29:45,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:45,684 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-05 18:29:45,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:45,684 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-05 18:29:45,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:29:45,688 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:45,688 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:29:45,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-05 18:29:45,889 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:45,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:45,889 INFO L82 PathProgramCache]: Analyzing trace with hash 983750928, now seen corresponding path program 414 times [2021-06-05 18:29:45,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:45,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599193858] [2021-06-05 18:29:45,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:45,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:46,191 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:46,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:46,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599193858] [2021-06-05 18:29:46,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599193858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:46,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457063118] [2021-06-05 18:29:46,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:46,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 18:29:46,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:46,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:29:46,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:46,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457063118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:46,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:46,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-05 18:29:46,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241108801] [2021-06-05 18:29:46,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:29:46,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:46,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:29:46,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:29:46,474 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:47,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:47,392 INFO L93 Difference]: Finished difference Result 7596 states and 20097 transitions. [2021-06-05 18:29:47,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 18:29:47,393 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:29:47,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:47,400 INFO L225 Difference]: With dead ends: 7596 [2021-06-05 18:29:47,400 INFO L226 Difference]: Without dead ends: 7326 [2021-06-05 18:29:47,400 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1651 ImplicationChecksByTransitivity, 974.9ms TimeCoverageRelationStatistics Valid=1613, Invalid=5029, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 18:29:47,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7326 states. [2021-06-05 18:29:47,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7326 to 5753. [2021-06-05 18:29:47,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:47,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-05 18:29:47,456 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-05 18:29:47,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:47,456 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-05 18:29:47,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:47,456 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-05 18:29:47,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:29:47,460 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:47,460 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:29:47,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable422,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:47,660 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:47,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:47,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1211574784, now seen corresponding path program 415 times [2021-06-05 18:29:47,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:47,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410199804] [2021-06-05 18:29:47,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:47,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:47,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:47,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410199804] [2021-06-05 18:29:47,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410199804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:47,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39539279] [2021-06-05 18:29:47,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:48,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:29:48,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:48,259 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:48,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39539279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:48,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:48,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-05 18:29:48,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995252956] [2021-06-05 18:29:48,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:29:48,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:48,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:29:48,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:29:48,260 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:49,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:49,310 INFO L93 Difference]: Finished difference Result 7546 states and 19997 transitions. [2021-06-05 18:29:49,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 18:29:49,311 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:29:49,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:49,318 INFO L225 Difference]: With dead ends: 7546 [2021-06-05 18:29:49,319 INFO L226 Difference]: Without dead ends: 7276 [2021-06-05 18:29:49,319 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1687 ImplicationChecksByTransitivity, 1125.1ms TimeCoverageRelationStatistics Valid=1646, Invalid=5326, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 18:29:49,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7276 states. [2021-06-05 18:29:49,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7276 to 5753. [2021-06-05 18:29:49,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:49,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-05 18:29:49,382 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-05 18:29:49,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:49,382 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-05 18:29:49,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:49,382 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-05 18:29:49,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:29:49,386 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:49,386 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:29:49,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-06-05 18:29:49,587 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:49,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:49,587 INFO L82 PathProgramCache]: Analyzing trace with hash 298625294, now seen corresponding path program 416 times [2021-06-05 18:29:49,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:49,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313848897] [2021-06-05 18:29:49,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:49,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:49,928 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:49,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:49,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313848897] [2021-06-05 18:29:49,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313848897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:49,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914709582] [2021-06-05 18:29:49,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:49,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:29:49,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:49,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:29:49,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:50,198 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:50,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914709582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:50,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:50,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-05 18:29:50,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445562824] [2021-06-05 18:29:50,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:29:50,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:50,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:29:50,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:29:50,199 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:51,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:51,152 INFO L93 Difference]: Finished difference Result 7496 states and 19897 transitions. [2021-06-05 18:29:51,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 18:29:51,152 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:29:51,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:51,159 INFO L225 Difference]: With dead ends: 7496 [2021-06-05 18:29:51,159 INFO L226 Difference]: Without dead ends: 7226 [2021-06-05 18:29:51,160 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 1032.2ms TimeCoverageRelationStatistics Valid=1718, Invalid=5254, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 18:29:51,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7226 states. [2021-06-05 18:29:51,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7226 to 5753. [2021-06-05 18:29:51,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:51,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-05 18:29:51,217 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-05 18:29:51,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:51,217 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-05 18:29:51,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:51,217 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-05 18:29:51,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:29:51,221 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:51,221 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:29:51,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:51,421 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:51,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:51,422 INFO L82 PathProgramCache]: Analyzing trace with hash 938283518, now seen corresponding path program 417 times [2021-06-05 18:29:51,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:51,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186390478] [2021-06-05 18:29:51,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:51,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:51,731 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:51,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:51,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186390478] [2021-06-05 18:29:51,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186390478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:51,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34415732] [2021-06-05 18:29:51,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:51,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 18:29:51,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:51,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 18:29:51,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:52,036 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:52,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34415732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:52,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:52,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-05 18:29:52,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899476774] [2021-06-05 18:29:52,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:29:52,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:52,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:29:52,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:29:52,037 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:53,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:53,126 INFO L93 Difference]: Finished difference Result 7446 states and 19797 transitions. [2021-06-05 18:29:53,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 18:29:53,127 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:29:53,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:53,134 INFO L225 Difference]: With dead ends: 7446 [2021-06-05 18:29:53,134 INFO L226 Difference]: Without dead ends: 7176 [2021-06-05 18:29:53,134 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1775 ImplicationChecksByTransitivity, 1139.9ms TimeCoverageRelationStatistics Valid=1666, Invalid=5644, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 18:29:53,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7176 states. [2021-06-05 18:29:53,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7176 to 5753. [2021-06-05 18:29:53,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:53,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-05 18:29:53,191 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-05 18:29:53,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:53,191 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-05 18:29:53,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:53,191 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-05 18:29:53,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:29:53,195 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:53,195 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:29:53,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-06-05 18:29:53,396 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:53,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:53,396 INFO L82 PathProgramCache]: Analyzing trace with hash 163364492, now seen corresponding path program 418 times [2021-06-05 18:29:53,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:53,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273997355] [2021-06-05 18:29:53,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:53,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:53,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:53,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273997355] [2021-06-05 18:29:53,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273997355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:53,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388711634] [2021-06-05 18:29:53,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:53,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:29:53,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:53,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:29:53,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:53,974 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:53,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388711634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:53,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:53,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-05 18:29:53,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211781890] [2021-06-05 18:29:53,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:29:53,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:53,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:29:53,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:29:53,975 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:54,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:54,983 INFO L93 Difference]: Finished difference Result 7396 states and 19697 transitions. [2021-06-05 18:29:54,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 18:29:54,983 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:29:54,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:54,989 INFO L225 Difference]: With dead ends: 7396 [2021-06-05 18:29:54,989 INFO L226 Difference]: Without dead ends: 7126 [2021-06-05 18:29:54,989 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 1058.2ms TimeCoverageRelationStatistics Valid=1839, Invalid=5471, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 18:29:54,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7126 states. [2021-06-05 18:29:55,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7126 to 5753. [2021-06-05 18:29:55,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:55,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-05 18:29:55,041 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-05 18:29:55,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:55,041 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-05 18:29:55,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:55,041 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-05 18:29:55,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:29:55,045 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:55,045 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:29:55,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:55,246 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:55,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:55,246 INFO L82 PathProgramCache]: Analyzing trace with hash -290548868, now seen corresponding path program 419 times [2021-06-05 18:29:55,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:55,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362774256] [2021-06-05 18:29:55,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:55,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:55,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:55,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362774256] [2021-06-05 18:29:55,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362774256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:55,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376832307] [2021-06-05 18:29:55,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:55,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 18:29:55,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:55,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:29:55,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:55,841 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:55,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376832307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:55,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:55,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-05 18:29:55,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800222191] [2021-06-05 18:29:55,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:29:55,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:55,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:29:55,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:29:55,842 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:57,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:57,032 INFO L93 Difference]: Finished difference Result 7346 states and 19597 transitions. [2021-06-05 18:29:57,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 18:29:57,032 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:29:57,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:57,039 INFO L225 Difference]: With dead ends: 7346 [2021-06-05 18:29:57,040 INFO L226 Difference]: Without dead ends: 7076 [2021-06-05 18:29:57,040 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1961 ImplicationChecksByTransitivity, 1210.4ms TimeCoverageRelationStatistics Valid=1876, Invalid=5780, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 18:29:57,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7076 states. [2021-06-05 18:29:57,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7076 to 5753. [2021-06-05 18:29:57,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:57,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-05 18:29:57,095 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-05 18:29:57,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:57,095 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-05 18:29:57,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:57,095 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-05 18:29:57,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:29:57,099 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:57,099 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:29:57,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,423 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:57,300 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:57,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:57,300 INFO L82 PathProgramCache]: Analyzing trace with hash 587463050, now seen corresponding path program 420 times [2021-06-05 18:29:57,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:57,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950981727] [2021-06-05 18:29:57,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:57,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:57,628 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:57,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:57,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950981727] [2021-06-05 18:29:57,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950981727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:57,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564828960] [2021-06-05 18:29:57,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:57,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 18:29:57,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:57,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 18:29:57,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:57,915 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:57,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564828960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:57,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:57,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-05 18:29:57,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773282730] [2021-06-05 18:29:57,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:29:57,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:57,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:29:57,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:29:57,916 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:58,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:58,950 INFO L93 Difference]: Finished difference Result 7296 states and 19497 transitions. [2021-06-05 18:29:58,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 18:29:58,951 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:29:58,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:58,958 INFO L225 Difference]: With dead ends: 7296 [2021-06-05 18:29:58,958 INFO L226 Difference]: Without dead ends: 7026 [2021-06-05 18:29:58,959 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2059 ImplicationChecksByTransitivity, 1079.1ms TimeCoverageRelationStatistics Valid=1976, Invalid=5680, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 18:29:58,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7026 states. [2021-06-05 18:29:59,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7026 to 5753. [2021-06-05 18:29:59,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:59,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-05 18:29:59,016 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-05 18:29:59,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:59,016 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-05 18:29:59,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:59,016 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-05 18:29:59,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:29:59,020 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:59,020 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:29:59,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:59,220 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:59,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:59,221 INFO L82 PathProgramCache]: Analyzing trace with hash -312591750, now seen corresponding path program 421 times [2021-06-05 18:29:59,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:59,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894780461] [2021-06-05 18:29:59,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:59,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:59,524 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:59,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:59,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894780461] [2021-06-05 18:29:59,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894780461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:59,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416024459] [2021-06-05 18:29:59,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:59,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:59,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:29:59,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:59,806 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:59,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416024459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:59,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:59,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-05 18:29:59,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28941593] [2021-06-05 18:29:59,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:29:59,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:59,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:29:59,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:29:59,807 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:01,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:01,082 INFO L93 Difference]: Finished difference Result 7246 states and 19397 transitions. [2021-06-05 18:30:01,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 18:30:01,082 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:30:01,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:01,089 INFO L225 Difference]: With dead ends: 7246 [2021-06-05 18:30:01,090 INFO L226 Difference]: Without dead ends: 6976 [2021-06-05 18:30:01,090 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 1275.6ms TimeCoverageRelationStatistics Valid=2015, Invalid=5995, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 18:30:01,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6976 states. [2021-06-05 18:30:01,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6976 to 5753. [2021-06-05 18:30:01,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:01,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-05 18:30:01,154 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-05 18:30:01,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:01,154 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-05 18:30:01,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:01,154 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-05 18:30:01,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:30:01,159 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:01,159 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:30:01,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:01,373 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:01,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:01,373 INFO L82 PathProgramCache]: Analyzing trace with hash -741656056, now seen corresponding path program 422 times [2021-06-05 18:30:01,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:01,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402406999] [2021-06-05 18:30:01,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:01,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:01,686 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:01,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:01,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402406999] [2021-06-05 18:30:01,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402406999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:01,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499609850] [2021-06-05 18:30:01,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:01,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:30:01,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:01,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:30:01,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:01,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499609850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:01,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:01,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-05 18:30:01,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869053533] [2021-06-05 18:30:01,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:30:01,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:01,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:30:01,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:30:01,959 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:03,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:03,104 INFO L93 Difference]: Finished difference Result 7196 states and 19297 transitions. [2021-06-05 18:30:03,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 18:30:03,104 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:30:03,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:03,110 INFO L225 Difference]: With dead ends: 7196 [2021-06-05 18:30:03,110 INFO L226 Difference]: Without dead ends: 6926 [2021-06-05 18:30:03,111 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2203 ImplicationChecksByTransitivity, 1159.0ms TimeCoverageRelationStatistics Valid=2129, Invalid=5881, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 18:30:03,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6926 states. [2021-06-05 18:30:03,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6926 to 5753. [2021-06-05 18:30:03,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:03,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-05 18:30:03,164 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-05 18:30:03,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:03,165 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-05 18:30:03,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:03,165 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-05 18:30:03,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:30:03,169 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:03,169 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:30:03,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable430,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:03,389 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:03,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:03,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1427839240, now seen corresponding path program 423 times [2021-06-05 18:30:03,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:03,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320416843] [2021-06-05 18:30:03,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:03,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:03,705 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:03,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:03,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320416843] [2021-06-05 18:30:03,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320416843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:03,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702451112] [2021-06-05 18:30:03,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:03,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 18:30:03,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:03,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 18:30:03,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:04,024 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:04,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702451112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:04,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:04,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-05 18:30:04,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311517254] [2021-06-05 18:30:04,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:30:04,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:04,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:30:04,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:30:04,025 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:05,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:05,414 INFO L93 Difference]: Finished difference Result 7146 states and 19197 transitions. [2021-06-05 18:30:05,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 18:30:05,414 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:30:05,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:05,422 INFO L225 Difference]: With dead ends: 7146 [2021-06-05 18:30:05,422 INFO L226 Difference]: Without dead ends: 6876 [2021-06-05 18:30:05,423 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2168 ImplicationChecksByTransitivity, 1379.7ms TimeCoverageRelationStatistics Valid=2002, Invalid=6370, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 18:30:05,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6876 states. [2021-06-05 18:30:05,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6876 to 5753. [2021-06-05 18:30:05,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:05,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-05 18:30:05,481 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-05 18:30:05,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:05,482 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-05 18:30:05,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:05,482 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-05 18:30:05,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:30:05,486 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:05,486 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:30:05,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-06-05 18:30:05,686 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:05,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:05,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1512873978, now seen corresponding path program 424 times [2021-06-05 18:30:05,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:05,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511915023] [2021-06-05 18:30:05,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:05,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:06,043 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:06,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:06,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511915023] [2021-06-05 18:30:06,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511915023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:06,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362263825] [2021-06-05 18:30:06,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:06,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:30:06,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:06,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:30:06,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:06,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362263825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:06,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:06,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-05 18:30:06,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948797433] [2021-06-05 18:30:06,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:30:06,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:06,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:30:06,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=969, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:30:06,324 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:07,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:07,486 INFO L93 Difference]: Finished difference Result 7096 states and 19097 transitions. [2021-06-05 18:30:07,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 18:30:07,487 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:30:07,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:07,494 INFO L225 Difference]: With dead ends: 7096 [2021-06-05 18:30:07,494 INFO L226 Difference]: Without dead ends: 6826 [2021-06-05 18:30:07,495 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 1200.2ms TimeCoverageRelationStatistics Valid=2298, Invalid=6074, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 18:30:07,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6826 states. [2021-06-05 18:30:07,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6826 to 5753. [2021-06-05 18:30:07,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:07,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-05 18:30:07,552 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-05 18:30:07,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:07,552 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-05 18:30:07,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:07,552 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-05 18:30:07,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:30:07,556 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:07,556 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:30:07,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 428 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 18:30:07,772 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:07,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:07,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1581025034, now seen corresponding path program 425 times [2021-06-05 18:30:07,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:07,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407778465] [2021-06-05 18:30:07,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:07,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:08,094 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:08,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:08,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407778465] [2021-06-05 18:30:08,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407778465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:08,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872798994] [2021-06-05 18:30:08,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:08,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 18:30:08,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:08,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:30:08,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:08,384 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:08,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872798994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:08,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:08,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-05 18:30:08,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235822543] [2021-06-05 18:30:08,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:30:08,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:08,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:30:08,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1038, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:30:08,385 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:09,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:09,910 INFO L93 Difference]: Finished difference Result 7046 states and 18997 transitions. [2021-06-05 18:30:09,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 18:30:09,910 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:30:09,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:09,918 INFO L225 Difference]: With dead ends: 7046 [2021-06-05 18:30:09,918 INFO L226 Difference]: Without dead ends: 6776 [2021-06-05 18:30:09,918 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2402 ImplicationChecksByTransitivity, 1484.5ms TimeCoverageRelationStatistics Valid=2341, Invalid=6401, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 18:30:09,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6776 states. [2021-06-05 18:30:09,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6776 to 5753. [2021-06-05 18:30:09,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:09,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-05 18:30:09,976 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-05 18:30:09,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:09,977 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-05 18:30:09,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:09,977 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-05 18:30:09,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:30:09,981 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:09,981 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:30:10,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 18:30:10,181 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:10,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:10,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1416973188, now seen corresponding path program 426 times [2021-06-05 18:30:10,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:10,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331943333] [2021-06-05 18:30:10,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:10,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:10,500 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:10,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:10,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331943333] [2021-06-05 18:30:10,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331943333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:10,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962993387] [2021-06-05 18:30:10,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:10,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 18:30:10,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:10,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:30:10,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:10,767 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:10,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962993387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:10,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:10,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-05 18:30:10,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062289230] [2021-06-05 18:30:10,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:30:10,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:10,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:30:10,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=949, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:30:10,768 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:11,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:11,994 INFO L93 Difference]: Finished difference Result 6996 states and 18897 transitions. [2021-06-05 18:30:11,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 18:30:11,994 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:30:11,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:12,000 INFO L225 Difference]: With dead ends: 6996 [2021-06-05 18:30:12,000 INFO L226 Difference]: Without dead ends: 6726 [2021-06-05 18:30:12,001 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2503 ImplicationChecksByTransitivity, 1241.2ms TimeCoverageRelationStatistics Valid=2483, Invalid=6259, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 18:30:12,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6726 states. [2021-06-05 18:30:12,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6726 to 5753. [2021-06-05 18:30:12,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:12,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-05 18:30:12,054 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-05 18:30:12,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:12,054 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-05 18:30:12,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:12,054 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-05 18:30:12,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:30:12,058 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:12,058 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:30:12,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:12,258 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:12,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:12,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1846726772, now seen corresponding path program 427 times [2021-06-05 18:30:12,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:12,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961260179] [2021-06-05 18:30:12,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:12,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:12,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961260179] [2021-06-05 18:30:12,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961260179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:12,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045870110] [2021-06-05 18:30:12,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:12,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:12,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:30:12,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:12,907 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:12,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045870110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:12,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:12,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-05 18:30:12,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248408077] [2021-06-05 18:30:12,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:30:12,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:12,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:30:12,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1017, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:30:12,908 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:14,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:14,728 INFO L93 Difference]: Finished difference Result 7006 states and 18947 transitions. [2021-06-05 18:30:14,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 18:30:14,729 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:30:14,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:14,734 INFO L225 Difference]: With dead ends: 7006 [2021-06-05 18:30:14,734 INFO L226 Difference]: Without dead ends: 6736 [2021-06-05 18:30:14,735 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2557 ImplicationChecksByTransitivity, 1742.8ms TimeCoverageRelationStatistics Valid=2528, Invalid=6592, Unknown=0, NotChecked=0, Total=9120 [2021-06-05 18:30:14,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6736 states. [2021-06-05 18:30:14,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6736 to 5753. [2021-06-05 18:30:14,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.831710709318498) internal successors, (16288), 5752 states have internal predecessors, (16288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:14,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16288 transitions. [2021-06-05 18:30:14,794 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16288 transitions. Word has length 175 [2021-06-05 18:30:14,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:14,794 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16288 transitions. [2021-06-05 18:30:14,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:14,794 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16288 transitions. [2021-06-05 18:30:14,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:30:14,798 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:14,798 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:30:15,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-06-05 18:30:15,015 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:15,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:15,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1788992642, now seen corresponding path program 428 times [2021-06-05 18:30:15,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:15,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082808074] [2021-06-05 18:30:15,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:15,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:15,326 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:15,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:15,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082808074] [2021-06-05 18:30:15,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082808074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:15,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94742204] [2021-06-05 18:30:15,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:15,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:30:15,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:15,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:30:15,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:15,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94742204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:15,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:15,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-05 18:30:15,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705325075] [2021-06-05 18:30:15,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:30:15,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:15,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:30:15,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=925, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:30:15,583 INFO L87 Difference]: Start difference. First operand 5753 states and 16288 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:16,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:16,781 INFO L93 Difference]: Finished difference Result 7748 states and 21071 transitions. [2021-06-05 18:30:16,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 18:30:16,781 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:30:16,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:16,789 INFO L225 Difference]: With dead ends: 7748 [2021-06-05 18:30:16,789 INFO L226 Difference]: Without dead ends: 7478 [2021-06-05 18:30:16,790 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2658 ImplicationChecksByTransitivity, 1203.1ms TimeCoverageRelationStatistics Valid=2685, Invalid=6435, Unknown=0, NotChecked=0, Total=9120 [2021-06-05 18:30:16,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7478 states. [2021-06-05 18:30:16,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7478 to 5933. [2021-06-05 18:30:16,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5933 states, 5932 states have (on average 2.8400202292650034) internal successors, (16847), 5932 states have internal predecessors, (16847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:16,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5933 states to 5933 states and 16847 transitions. [2021-06-05 18:30:16,852 INFO L78 Accepts]: Start accepts. Automaton has 5933 states and 16847 transitions. Word has length 175 [2021-06-05 18:30:16,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:16,852 INFO L482 AbstractCegarLoop]: Abstraction has 5933 states and 16847 transitions. [2021-06-05 18:30:16,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:16,852 INFO L276 IsEmpty]: Start isEmpty. Operand 5933 states and 16847 transitions. [2021-06-05 18:30:16,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:30:16,856 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:16,856 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:30:17,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-05 18:30:17,056 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:17,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:17,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1811335892, now seen corresponding path program 429 times [2021-06-05 18:30:17,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:17,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162911347] [2021-06-05 18:30:17,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:17,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:17,411 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:17,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:17,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162911347] [2021-06-05 18:30:17,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162911347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:17,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302400120] [2021-06-05 18:30:17,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:17,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 18:30:17,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:17,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:30:17,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:17,680 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:17,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302400120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:17,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:17,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-05 18:30:17,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356761225] [2021-06-05 18:30:17,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:30:17,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:17,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:30:17,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=925, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:30:17,681 INFO L87 Difference]: Start difference. First operand 5933 states and 16847 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:19,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:19,044 INFO L93 Difference]: Finished difference Result 7210 states and 19721 transitions. [2021-06-05 18:30:19,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 18:30:19,044 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:30:19,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:19,051 INFO L225 Difference]: With dead ends: 7210 [2021-06-05 18:30:19,051 INFO L226 Difference]: Without dead ends: 6721 [2021-06-05 18:30:19,052 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2532 ImplicationChecksByTransitivity, 1381.9ms TimeCoverageRelationStatistics Valid=2422, Invalid=6890, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 18:30:19,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6721 states. [2021-06-05 18:30:19,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6721 to 5878. [2021-06-05 18:30:19,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5878 states, 5877 states have (on average 2.8386932108218477) internal successors, (16683), 5877 states have internal predecessors, (16683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:19,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5878 states to 5878 states and 16683 transitions. [2021-06-05 18:30:19,108 INFO L78 Accepts]: Start accepts. Automaton has 5878 states and 16683 transitions. Word has length 175 [2021-06-05 18:30:19,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:19,108 INFO L482 AbstractCegarLoop]: Abstraction has 5878 states and 16683 transitions. [2021-06-05 18:30:19,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:19,108 INFO L276 IsEmpty]: Start isEmpty. Operand 5878 states and 16683 transitions. [2021-06-05 18:30:19,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:30:19,112 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:19,112 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:30:19,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-06-05 18:30:19,313 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:19,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:19,313 INFO L82 PathProgramCache]: Analyzing trace with hash -359446824, now seen corresponding path program 430 times [2021-06-05 18:30:19,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:19,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212543776] [2021-06-05 18:30:19,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:19,727 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:19,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:19,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212543776] [2021-06-05 18:30:19,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212543776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:19,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984217097] [2021-06-05 18:30:19,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:19,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:30:19,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:19,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:30:19,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:20,076 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:20,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984217097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:20,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:20,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 39 [2021-06-05 18:30:20,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975237669] [2021-06-05 18:30:20,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:30:20,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:20,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:30:20,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=1146, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:30:20,077 INFO L87 Difference]: Start difference. First operand 5878 states and 16683 transitions. Second operand has 39 states, 39 states have (on average 5.384615384615385) internal successors, (210), 39 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:20,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:20,865 INFO L93 Difference]: Finished difference Result 7268 states and 19783 transitions. [2021-06-05 18:30:20,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 18:30:20,865 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.384615384615385) internal successors, (210), 39 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:30:20,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:20,872 INFO L225 Difference]: With dead ends: 7268 [2021-06-05 18:30:20,872 INFO L226 Difference]: Without dead ends: 6934 [2021-06-05 18:30:20,873 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 1004.5ms TimeCoverageRelationStatistics Valid=1538, Invalid=4012, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 18:30:20,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6934 states. [2021-06-05 18:30:20,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6934 to 5963. [2021-06-05 18:30:20,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5963 states, 5962 states have (on average 2.8267359946326738) internal successors, (16853), 5962 states have internal predecessors, (16853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:20,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5963 states to 5963 states and 16853 transitions. [2021-06-05 18:30:20,931 INFO L78 Accepts]: Start accepts. Automaton has 5963 states and 16853 transitions. Word has length 180 [2021-06-05 18:30:20,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:20,931 INFO L482 AbstractCegarLoop]: Abstraction has 5963 states and 16853 transitions. [2021-06-05 18:30:20,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.384615384615385) internal successors, (210), 39 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:20,932 INFO L276 IsEmpty]: Start isEmpty. Operand 5963 states and 16853 transitions. [2021-06-05 18:30:20,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:30:20,935 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:20,936 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:30:21,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:21,136 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:21,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:21,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1425719172, now seen corresponding path program 431 times [2021-06-05 18:30:21,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:21,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541583475] [2021-06-05 18:30:21,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:21,587 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:21,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:21,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541583475] [2021-06-05 18:30:21,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541583475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:21,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113880513] [2021-06-05 18:30:21,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:21,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 18:30:21,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:21,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:30:21,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:21,895 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:21,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113880513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:21,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:21,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-05 18:30:21,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56580870] [2021-06-05 18:30:21,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:30:21,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:21,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:30:21,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:30:21,896 INFO L87 Difference]: Start difference. First operand 5963 states and 16853 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:22,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:22,563 INFO L93 Difference]: Finished difference Result 8561 states and 22177 transitions. [2021-06-05 18:30:22,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:30:22,563 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:30:22,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:22,571 INFO L225 Difference]: With dead ends: 8561 [2021-06-05 18:30:22,572 INFO L226 Difference]: Without dead ends: 8291 [2021-06-05 18:30:22,572 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 922.2ms TimeCoverageRelationStatistics Valid=1335, Invalid=3357, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 18:30:22,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8291 states. [2021-06-05 18:30:22,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8291 to 5978. [2021-06-05 18:30:22,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:22,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:30:22,651 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:30:22,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:22,651 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:30:22,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:22,651 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:30:22,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:30:22,655 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:22,655 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:30:22,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable439 [2021-06-05 18:30:22,856 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:22,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:22,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1305889132, now seen corresponding path program 432 times [2021-06-05 18:30:22,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:22,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519405426] [2021-06-05 18:30:22,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:23,264 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:23,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:23,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519405426] [2021-06-05 18:30:23,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519405426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:23,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216147732] [2021-06-05 18:30:23,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:23,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 18:30:23,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:23,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:30:23,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:23,596 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:23,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216147732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:23,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:23,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-05 18:30:23,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447477313] [2021-06-05 18:30:23,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:30:23,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:23,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:30:23,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1048, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:30:23,597 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:24,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:24,363 INFO L93 Difference]: Finished difference Result 8446 states and 21947 transitions. [2021-06-05 18:30:24,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 18:30:24,364 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:30:24,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:24,372 INFO L225 Difference]: With dead ends: 8446 [2021-06-05 18:30:24,372 INFO L226 Difference]: Without dead ends: 8176 [2021-06-05 18:30:24,373 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 967.9ms TimeCoverageRelationStatistics Valid=1424, Invalid=3832, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 18:30:24,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8176 states. [2021-06-05 18:30:24,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8176 to 5978. [2021-06-05 18:30:24,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:24,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:30:24,441 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:30:24,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:24,441 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:30:24,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:24,441 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:30:24,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:30:24,445 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:24,446 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:30:24,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:24,646 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:24,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:24,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1296324102, now seen corresponding path program 433 times [2021-06-05 18:30:24,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:24,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977310422] [2021-06-05 18:30:24,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:25,040 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:25,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:25,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977310422] [2021-06-05 18:30:25,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977310422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:25,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918019416] [2021-06-05 18:30:25,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:25,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:25,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:30:25,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:25,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918019416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:25,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:25,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-05 18:30:25,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137772384] [2021-06-05 18:30:25,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:30:25,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:25,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:30:25,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=992, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:30:25,367 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:26,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:26,114 INFO L93 Difference]: Finished difference Result 8421 states and 21897 transitions. [2021-06-05 18:30:26,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:30:26,114 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:30:26,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:26,125 INFO L225 Difference]: With dead ends: 8421 [2021-06-05 18:30:26,126 INFO L226 Difference]: Without dead ends: 8151 [2021-06-05 18:30:26,127 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 927.0ms TimeCoverageRelationStatistics Valid=1329, Invalid=3641, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 18:30:26,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8151 states. [2021-06-05 18:30:26,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8151 to 5978. [2021-06-05 18:30:26,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:26,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:30:26,189 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:30:26,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:26,189 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:30:26,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:26,189 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:30:26,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:30:26,193 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:26,193 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:30:26,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-06-05 18:30:26,394 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:26,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:26,394 INFO L82 PathProgramCache]: Analyzing trace with hash 2057707242, now seen corresponding path program 434 times [2021-06-05 18:30:26,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:26,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398814826] [2021-06-05 18:30:26,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:26,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:26,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398814826] [2021-06-05 18:30:26,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398814826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:26,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299790420] [2021-06-05 18:30:26,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:26,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:30:26,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:26,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:30:26,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:27,104 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:27,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299790420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:27,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:27,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-05 18:30:27,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098914968] [2021-06-05 18:30:27,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:30:27,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:27,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:30:27,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:30:27,105 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:28,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:28,082 INFO L93 Difference]: Finished difference Result 8371 states and 21797 transitions. [2021-06-05 18:30:28,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:30:28,082 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:30:28,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:28,089 INFO L225 Difference]: With dead ends: 8371 [2021-06-05 18:30:28,089 INFO L226 Difference]: Without dead ends: 8101 [2021-06-05 18:30:28,090 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 1070.0ms TimeCoverageRelationStatistics Valid=1426, Invalid=4124, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 18:30:28,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8101 states. [2021-06-05 18:30:28,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8101 to 5978. [2021-06-05 18:30:28,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:28,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:30:28,152 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:30:28,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:28,152 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:30:28,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:28,152 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:30:28,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:30:28,156 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:28,156 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:30:28,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-05 18:30:28,357 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:28,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:28,357 INFO L82 PathProgramCache]: Analyzing trace with hash -605931272, now seen corresponding path program 435 times [2021-06-05 18:30:28,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:28,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738314924] [2021-06-05 18:30:28,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:28,745 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:28,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:28,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738314924] [2021-06-05 18:30:28,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738314924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:28,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173580636] [2021-06-05 18:30:28,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:28,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-05 18:30:28,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:28,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:30:28,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:29,063 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:29,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173580636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:29,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:29,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-05 18:30:29,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567139392] [2021-06-05 18:30:29,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:30:29,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:29,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:30:29,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:30:29,064 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:29,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:29,893 INFO L93 Difference]: Finished difference Result 8321 states and 21697 transitions. [2021-06-05 18:30:29,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:30:29,893 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:30:29,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:29,901 INFO L225 Difference]: With dead ends: 8321 [2021-06-05 18:30:29,902 INFO L226 Difference]: Without dead ends: 8051 [2021-06-05 18:30:29,902 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 934.1ms TimeCoverageRelationStatistics Valid=1339, Invalid=3917, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 18:30:29,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8051 states. [2021-06-05 18:30:29,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8051 to 5978. [2021-06-05 18:30:29,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:29,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:30:29,964 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:30:29,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:29,964 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:30:29,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:29,964 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:30:29,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:30:29,968 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:29,968 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:30:30,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 439 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-06-05 18:30:30,169 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:30,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:30,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1451419160, now seen corresponding path program 436 times [2021-06-05 18:30:30,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:30,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253959141] [2021-06-05 18:30:30,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:30,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:30,578 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:30,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:30,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253959141] [2021-06-05 18:30:30,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253959141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:30,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452225751] [2021-06-05 18:30:30,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:30,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:30:30,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:30,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:30:30,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:30,890 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:30,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452225751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:30,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:30,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-05 18:30:30,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144598027] [2021-06-05 18:30:30,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:30:30,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:30,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:30:30,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1096, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:30:30,890 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:31,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:31,781 INFO L93 Difference]: Finished difference Result 8271 states and 21597 transitions. [2021-06-05 18:30:31,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:30:31,781 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:30:31,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:31,790 INFO L225 Difference]: With dead ends: 8271 [2021-06-05 18:30:31,790 INFO L226 Difference]: Without dead ends: 8001 [2021-06-05 18:30:31,790 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 1060.7ms TimeCoverageRelationStatistics Valid=1444, Invalid=4408, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 18:30:31,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8001 states. [2021-06-05 18:30:31,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8001 to 5978. [2021-06-05 18:30:31,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:31,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:30:31,860 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:30:31,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:31,860 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:30:31,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:31,860 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:30:31,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:30:31,865 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:31,865 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:30:32,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 440 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 18:30:32,065 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:32,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:32,065 INFO L82 PathProgramCache]: Analyzing trace with hash 937545078, now seen corresponding path program 437 times [2021-06-05 18:30:32,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:32,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379398258] [2021-06-05 18:30:32,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:32,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:32,454 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:32,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:32,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379398258] [2021-06-05 18:30:32,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379398258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:32,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487414118] [2021-06-05 18:30:32,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:32,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 18:30:32,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:32,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:30:32,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:32,755 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:32,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487414118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:32,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:32,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-05 18:30:32,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60796336] [2021-06-05 18:30:32,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:30:32,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:32,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:30:32,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1034, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:30:32,756 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:33,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:33,631 INFO L93 Difference]: Finished difference Result 8221 states and 21497 transitions. [2021-06-05 18:30:33,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:30:33,632 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:30:33,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:33,639 INFO L225 Difference]: With dead ends: 8221 [2021-06-05 18:30:33,639 INFO L226 Difference]: Without dead ends: 7951 [2021-06-05 18:30:33,639 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 956.9ms TimeCoverageRelationStatistics Valid=1365, Invalid=4185, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 18:30:33,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7951 states. [2021-06-05 18:30:33,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7951 to 5978. [2021-06-05 18:30:33,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:33,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:30:33,698 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:30:33,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:33,698 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:30:33,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:33,698 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:30:33,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:30:33,702 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:33,702 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:30:33,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-06-05 18:30:33,915 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:33,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:33,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1820596838, now seen corresponding path program 438 times [2021-06-05 18:30:33,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:33,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183306202] [2021-06-05 18:30:33,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:33,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:34,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:34,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183306202] [2021-06-05 18:30:34,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183306202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:34,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389921416] [2021-06-05 18:30:34,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:34,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 18:30:34,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:34,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:30:34,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:34,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389921416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:34,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:34,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-05 18:30:34,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111971590] [2021-06-05 18:30:34,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:30:34,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:34,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:30:34,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1114, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:30:34,627 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:35,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:35,622 INFO L93 Difference]: Finished difference Result 8171 states and 21397 transitions. [2021-06-05 18:30:35,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 18:30:35,623 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:30:35,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:35,631 INFO L225 Difference]: With dead ends: 8171 [2021-06-05 18:30:35,631 INFO L226 Difference]: Without dead ends: 7901 [2021-06-05 18:30:35,631 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 1118.7ms TimeCoverageRelationStatistics Valid=1478, Invalid=4684, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 18:30:35,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7901 states. [2021-06-05 18:30:35,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7901 to 5978. [2021-06-05 18:30:35,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:35,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:30:35,726 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:30:35,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:35,726 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:30:35,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:35,726 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:30:35,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:30:35,730 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:35,730 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:30:35,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:35,937 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:35,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:35,937 INFO L82 PathProgramCache]: Analyzing trace with hash -71612556, now seen corresponding path program 439 times [2021-06-05 18:30:35,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:35,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429646919] [2021-06-05 18:30:35,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:36,306 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:36,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:36,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429646919] [2021-06-05 18:30:36,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429646919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:36,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722220582] [2021-06-05 18:30:36,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:36,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:36,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:30:36,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:36,604 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:36,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722220582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:36,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:36,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-05 18:30:36,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999047914] [2021-06-05 18:30:36,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:30:36,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:36,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:30:36,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1049, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:30:36,605 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:37,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:37,472 INFO L93 Difference]: Finished difference Result 8121 states and 21297 transitions. [2021-06-05 18:30:37,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:30:37,472 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:30:37,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:37,480 INFO L225 Difference]: With dead ends: 8121 [2021-06-05 18:30:37,481 INFO L226 Difference]: Without dead ends: 7851 [2021-06-05 18:30:37,481 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 998.2ms TimeCoverageRelationStatistics Valid=1407, Invalid=4445, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 18:30:37,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7851 states. [2021-06-05 18:30:37,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7851 to 5978. [2021-06-05 18:30:37,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:37,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:30:37,543 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:30:37,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:37,544 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:30:37,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:37,544 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:30:37,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:30:37,548 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:37,548 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:30:37,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-06-05 18:30:37,748 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:37,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:37,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1769734244, now seen corresponding path program 440 times [2021-06-05 18:30:37,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:37,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441001038] [2021-06-05 18:30:37,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:37,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:38,145 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:38,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:38,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441001038] [2021-06-05 18:30:38,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441001038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:38,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595731109] [2021-06-05 18:30:38,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:38,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:30:38,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:38,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:30:38,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:38,513 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:38,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595731109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:38,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:38,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-05 18:30:38,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480950782] [2021-06-05 18:30:38,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:30:38,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:38,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:30:38,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:30:38,514 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:39,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:39,562 INFO L93 Difference]: Finished difference Result 8071 states and 21197 transitions. [2021-06-05 18:30:39,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 18:30:39,562 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:30:39,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:39,570 INFO L225 Difference]: With dead ends: 8071 [2021-06-05 18:30:39,570 INFO L226 Difference]: Without dead ends: 7801 [2021-06-05 18:30:39,570 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1181.9ms TimeCoverageRelationStatistics Valid=1528, Invalid=4952, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 18:30:39,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7801 states. [2021-06-05 18:30:39,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7801 to 5978. [2021-06-05 18:30:39,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:39,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:30:39,639 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:30:39,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:39,639 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:30:39,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:39,639 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:30:39,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:30:39,643 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:39,644 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:30:39,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-06-05 18:30:39,860 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:39,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:39,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1643673870, now seen corresponding path program 441 times [2021-06-05 18:30:39,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:39,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180046513] [2021-06-05 18:30:39,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:39,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:40,209 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:40,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:40,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180046513] [2021-06-05 18:30:40,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180046513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:40,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444912562] [2021-06-05 18:30:40,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:40,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-05 18:30:40,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:40,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-05 18:30:40,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:40,512 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:40,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444912562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:40,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:40,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-05 18:30:40,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517440319] [2021-06-05 18:30:40,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:30:40,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:40,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:30:40,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:30:40,513 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:41,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:41,436 INFO L93 Difference]: Finished difference Result 8021 states and 21097 transitions. [2021-06-05 18:30:41,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 18:30:41,436 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:30:41,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:41,443 INFO L225 Difference]: With dead ends: 8021 [2021-06-05 18:30:41,443 INFO L226 Difference]: Without dead ends: 7751 [2021-06-05 18:30:41,444 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 1030.3ms TimeCoverageRelationStatistics Valid=1465, Invalid=4697, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 18:30:41,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7751 states. [2021-06-05 18:30:41,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7751 to 5978. [2021-06-05 18:30:41,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:41,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:30:41,500 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:30:41,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:41,500 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:30:41,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:41,500 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:30:41,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:30:41,504 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:41,504 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:30:41,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-06-05 18:30:41,705 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:41,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:41,705 INFO L82 PathProgramCache]: Analyzing trace with hash 2008919010, now seen corresponding path program 442 times [2021-06-05 18:30:41,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:41,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72251302] [2021-06-05 18:30:41,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:42,068 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:42,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:42,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72251302] [2021-06-05 18:30:42,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72251302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:42,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520363056] [2021-06-05 18:30:42,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:42,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:30:42,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:42,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:30:42,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:42,367 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:42,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520363056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:42,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:42,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-05 18:30:42,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983724494] [2021-06-05 18:30:42,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:30:42,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:42,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:30:42,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:30:42,368 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:43,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:43,426 INFO L93 Difference]: Finished difference Result 7971 states and 20997 transitions. [2021-06-05 18:30:43,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 18:30:43,426 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:30:43,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:43,434 INFO L225 Difference]: With dead ends: 7971 [2021-06-05 18:30:43,434 INFO L226 Difference]: Without dead ends: 7701 [2021-06-05 18:30:43,435 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1495 ImplicationChecksByTransitivity, 1149.1ms TimeCoverageRelationStatistics Valid=1594, Invalid=5212, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 18:30:43,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7701 states. [2021-06-05 18:30:43,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7701 to 5978. [2021-06-05 18:30:43,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:43,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:30:43,498 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:30:43,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:43,498 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:30:43,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:43,499 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:30:43,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:30:43,503 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:43,503 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:30:43,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:43,703 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:43,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:43,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1962372080, now seen corresponding path program 443 times [2021-06-05 18:30:43,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:43,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93720021] [2021-06-05 18:30:43,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:43,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:44,092 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:44,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:44,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93720021] [2021-06-05 18:30:44,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93720021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:44,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503782428] [2021-06-05 18:30:44,093 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:44,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 18:30:44,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:44,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:30:44,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:44,379 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:44,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503782428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:44,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:44,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-05 18:30:44,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092665561] [2021-06-05 18:30:44,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:30:44,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:44,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:30:44,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:30:44,380 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:45,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:45,270 INFO L93 Difference]: Finished difference Result 7921 states and 20897 transitions. [2021-06-05 18:30:45,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 18:30:45,271 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:30:45,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:45,279 INFO L225 Difference]: With dead ends: 7921 [2021-06-05 18:30:45,279 INFO L226 Difference]: Without dead ends: 7651 [2021-06-05 18:30:45,280 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 1050.1ms TimeCoverageRelationStatistics Valid=1539, Invalid=4941, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 18:30:45,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7651 states. [2021-06-05 18:30:45,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7651 to 5978. [2021-06-05 18:30:45,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:45,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:30:45,345 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:30:45,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:45,346 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:30:45,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:45,346 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:30:45,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:30:45,350 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:45,350 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:30:45,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,447 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:45,562 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:45,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:45,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1043987680, now seen corresponding path program 444 times [2021-06-05 18:30:45,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:45,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179169828] [2021-06-05 18:30:45,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:45,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:45,919 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:45,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:45,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179169828] [2021-06-05 18:30:45,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179169828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:45,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304731933] [2021-06-05 18:30:45,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:45,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 18:30:45,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:45,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:30:46,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:46,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304731933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:46,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:46,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-05 18:30:46,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777970503] [2021-06-05 18:30:46,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:30:46,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:46,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:30:46,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:30:46,237 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:47,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:47,376 INFO L93 Difference]: Finished difference Result 7871 states and 20797 transitions. [2021-06-05 18:30:47,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 18:30:47,376 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:30:47,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:47,384 INFO L225 Difference]: With dead ends: 7871 [2021-06-05 18:30:47,384 INFO L226 Difference]: Without dead ends: 7601 [2021-06-05 18:30:47,385 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 1227.6ms TimeCoverageRelationStatistics Valid=1676, Invalid=5464, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 18:30:47,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7601 states. [2021-06-05 18:30:47,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7601 to 5978. [2021-06-05 18:30:47,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:47,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:30:47,450 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:30:47,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:47,450 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:30:47,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:47,451 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:30:47,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:30:47,455 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:47,455 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:30:47,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-06-05 18:30:47,669 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:47,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:47,669 INFO L82 PathProgramCache]: Analyzing trace with hash -732703122, now seen corresponding path program 445 times [2021-06-05 18:30:47,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:47,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346261986] [2021-06-05 18:30:47,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:47,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:48,018 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:48,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:48,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346261986] [2021-06-05 18:30:48,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346261986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:48,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195728530] [2021-06-05 18:30:48,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:48,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:30:48,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:48,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195728530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:48,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:48,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-05 18:30:48,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017766733] [2021-06-05 18:30:48,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:30:48,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:48,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:30:48,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:30:48,313 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:49,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:49,432 INFO L93 Difference]: Finished difference Result 7821 states and 20697 transitions. [2021-06-05 18:30:49,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 18:30:49,432 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:30:49,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:49,439 INFO L225 Difference]: With dead ends: 7821 [2021-06-05 18:30:49,440 INFO L226 Difference]: Without dead ends: 7551 [2021-06-05 18:30:49,440 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1589 ImplicationChecksByTransitivity, 1116.3ms TimeCoverageRelationStatistics Valid=1629, Invalid=5177, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 18:30:49,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7551 states. [2021-06-05 18:30:49,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7551 to 5978. [2021-06-05 18:30:49,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:49,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:30:49,501 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:30:49,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:49,501 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:30:49,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:49,502 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:30:49,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:30:49,506 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:49,507 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:30:49,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable453,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:49,720 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:49,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:49,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1366938462, now seen corresponding path program 446 times [2021-06-05 18:30:49,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:49,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537231245] [2021-06-05 18:30:49,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:49,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:50,091 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:50,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:50,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537231245] [2021-06-05 18:30:50,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537231245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:50,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164388545] [2021-06-05 18:30:50,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:50,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:30:50,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:50,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:30:50,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:50,398 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:50,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164388545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:50,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:50,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-05 18:30:50,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289980632] [2021-06-05 18:30:50,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:30:50,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:50,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:30:50,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:30:50,399 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:51,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:51,582 INFO L93 Difference]: Finished difference Result 7771 states and 20597 transitions. [2021-06-05 18:30:51,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 18:30:51,583 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:30:51,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:51,590 INFO L225 Difference]: With dead ends: 7771 [2021-06-05 18:30:51,590 INFO L226 Difference]: Without dead ends: 7501 [2021-06-05 18:30:51,591 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1747 ImplicationChecksByTransitivity, 1261.0ms TimeCoverageRelationStatistics Valid=1774, Invalid=5708, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 18:30:51,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7501 states. [2021-06-05 18:30:51,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7501 to 5978. [2021-06-05 18:30:51,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:51,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:30:51,650 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:30:51,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:51,650 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:30:51,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:51,650 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:30:51,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:30:51,654 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:51,654 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:30:51,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable454,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:51,855 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:51,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:51,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1417828756, now seen corresponding path program 447 times [2021-06-05 18:30:51,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:51,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530744339] [2021-06-05 18:30:51,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:52,235 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:52,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:52,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530744339] [2021-06-05 18:30:52,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530744339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:52,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799758941] [2021-06-05 18:30:52,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:52,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-05 18:30:52,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:52,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 18:30:52,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:52,520 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:52,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799758941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:52,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:52,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-05 18:30:52,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924219133] [2021-06-05 18:30:52,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:30:52,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:52,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:30:52,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:30:52,521 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:53,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:53,564 INFO L93 Difference]: Finished difference Result 7721 states and 20497 transitions. [2021-06-05 18:30:53,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 18:30:53,564 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:30:53,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:53,572 INFO L225 Difference]: With dead ends: 7721 [2021-06-05 18:30:53,572 INFO L226 Difference]: Without dead ends: 7451 [2021-06-05 18:30:53,573 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1714 ImplicationChecksByTransitivity, 1080.3ms TimeCoverageRelationStatistics Valid=1735, Invalid=5405, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 18:30:53,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7451 states. [2021-06-05 18:30:53,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7451 to 5978. [2021-06-05 18:30:53,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:53,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:30:53,633 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:30:53,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:53,633 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:30:53,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:53,633 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:30:53,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:30:53,637 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:53,637 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:30:53,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-06-05 18:30:53,838 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:53,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:53,838 INFO L82 PathProgramCache]: Analyzing trace with hash -778170532, now seen corresponding path program 448 times [2021-06-05 18:30:53,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:53,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268722542] [2021-06-05 18:30:53,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:53,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:54,185 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:54,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:54,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268722542] [2021-06-05 18:30:54,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268722542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:54,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13052710] [2021-06-05 18:30:54,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:54,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:30:54,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:54,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:30:54,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:54,497 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:54,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13052710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:54,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:54,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-05 18:30:54,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342306662] [2021-06-05 18:30:54,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:30:54,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:54,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:30:54,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:30:54,498 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:55,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:55,781 INFO L93 Difference]: Finished difference Result 7671 states and 20397 transitions. [2021-06-05 18:30:55,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 18:30:55,781 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:30:55,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:55,789 INFO L225 Difference]: With dead ends: 7671 [2021-06-05 18:30:55,790 INFO L226 Difference]: Without dead ends: 7401 [2021-06-05 18:30:55,790 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1879 ImplicationChecksByTransitivity, 1297.5ms TimeCoverageRelationStatistics Valid=1888, Invalid=5944, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 18:30:55,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7401 states. [2021-06-05 18:30:55,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7401 to 5978. [2021-06-05 18:30:55,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:55,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:30:55,849 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:30:55,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:55,850 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:30:55,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:55,850 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:30:55,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:30:55,854 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:55,854 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:30:56,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-06-05 18:30:56,054 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:56,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:56,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1553089558, now seen corresponding path program 449 times [2021-06-05 18:30:56,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:56,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421425251] [2021-06-05 18:30:56,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:56,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:56,374 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:56,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:56,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421425251] [2021-06-05 18:30:56,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421425251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:56,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5524965] [2021-06-05 18:30:56,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:56,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 18:30:56,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:56,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:30:56,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:56,648 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:56,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5524965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:56,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:56,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-05 18:30:56,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052620866] [2021-06-05 18:30:56,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:30:56,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:56,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:30:56,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:30:56,649 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:57,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:57,758 INFO L93 Difference]: Finished difference Result 7621 states and 20297 transitions. [2021-06-05 18:30:57,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 18:30:57,758 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:30:57,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:57,765 INFO L225 Difference]: With dead ends: 7621 [2021-06-05 18:30:57,765 INFO L226 Difference]: Without dead ends: 7351 [2021-06-05 18:30:57,766 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1843 ImplicationChecksByTransitivity, 1115.5ms TimeCoverageRelationStatistics Valid=1857, Invalid=5625, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 18:30:57,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7351 states. [2021-06-05 18:30:57,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7351 to 5978. [2021-06-05 18:30:57,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:57,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:30:57,823 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:30:57,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:57,823 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:30:57,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:57,823 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:30:57,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:30:57,827 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:57,827 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:30:58,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:58,027 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:58,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:58,028 INFO L82 PathProgramCache]: Analyzing trace with hash -2007002918, now seen corresponding path program 450 times [2021-06-05 18:30:58,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:58,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203512580] [2021-06-05 18:30:58,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:58,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:58,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:58,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203512580] [2021-06-05 18:30:58,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203512580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:58,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068851687] [2021-06-05 18:30:58,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:58,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 18:30:58,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:58,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 18:30:58,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:58,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068851687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:58,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:58,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-05 18:30:58,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695346658] [2021-06-05 18:30:58,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:30:58,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:58,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:30:58,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:30:58,648 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:59,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:59,904 INFO L93 Difference]: Finished difference Result 7571 states and 20197 transitions. [2021-06-05 18:30:59,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 18:30:59,904 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:30:59,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:59,911 INFO L225 Difference]: With dead ends: 7571 [2021-06-05 18:30:59,911 INFO L226 Difference]: Without dead ends: 7301 [2021-06-05 18:30:59,911 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1858 ImplicationChecksByTransitivity, 1244.7ms TimeCoverageRelationStatistics Valid=1780, Invalid=6052, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 18:30:59,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7301 states. [2021-06-05 18:30:59,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7301 to 5978. [2021-06-05 18:30:59,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:59,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:30:59,966 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:30:59,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:59,966 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:30:59,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:59,966 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:30:59,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:30:59,970 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:59,970 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:31:00,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-06-05 18:31:00,170 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:00,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:00,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1128991000, now seen corresponding path program 451 times [2021-06-05 18:31:00,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:00,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704092608] [2021-06-05 18:31:00,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:00,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:00,481 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:00,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:00,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704092608] [2021-06-05 18:31:00,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704092608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:00,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226322547] [2021-06-05 18:31:00,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:00,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:00,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:31:00,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:00,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226322547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:00,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:00,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-05 18:31:00,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620095496] [2021-06-05 18:31:00,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:31:00,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:00,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:31:00,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:31:00,752 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:01,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:01,874 INFO L93 Difference]: Finished difference Result 7521 states and 20097 transitions. [2021-06-05 18:31:01,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 18:31:01,874 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:31:01,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:01,881 INFO L225 Difference]: With dead ends: 7521 [2021-06-05 18:31:01,881 INFO L226 Difference]: Without dead ends: 7251 [2021-06-05 18:31:01,882 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1976 ImplicationChecksByTransitivity, 1113.1ms TimeCoverageRelationStatistics Valid=1995, Invalid=5837, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 18:31:01,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7251 states. [2021-06-05 18:31:01,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7251 to 5978. [2021-06-05 18:31:01,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:01,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:31:01,941 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:31:01,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:01,941 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:31:01,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:01,941 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:31:01,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:31:01,945 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:01,945 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:31:02,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-06-05 18:31:02,146 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:02,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:02,146 INFO L82 PathProgramCache]: Analyzing trace with hash -2029045800, now seen corresponding path program 452 times [2021-06-05 18:31:02,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:02,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489318522] [2021-06-05 18:31:02,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:02,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:02,488 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:02,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:02,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489318522] [2021-06-05 18:31:02,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489318522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:02,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636869286] [2021-06-05 18:31:02,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:02,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:31:02,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:02,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:31:02,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:02,772 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:02,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636869286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:02,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:02,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-05 18:31:02,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579624509] [2021-06-05 18:31:02,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:31:02,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:02,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:31:02,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:31:02,773 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:04,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:04,163 INFO L93 Difference]: Finished difference Result 7471 states and 19997 transitions. [2021-06-05 18:31:04,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 18:31:04,163 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:31:04,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:04,171 INFO L225 Difference]: With dead ends: 7471 [2021-06-05 18:31:04,171 INFO L226 Difference]: Without dead ends: 7201 [2021-06-05 18:31:04,172 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 1392.2ms TimeCoverageRelationStatistics Valid=2164, Invalid=6392, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 18:31:04,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7201 states. [2021-06-05 18:31:04,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7201 to 5978. [2021-06-05 18:31:04,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:04,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:31:04,233 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:31:04,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:04,233 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:31:04,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:04,234 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:31:04,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:31:04,238 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:04,238 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:31:04,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:04,438 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:04,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:04,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1836857190, now seen corresponding path program 453 times [2021-06-05 18:31:04,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:04,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898881325] [2021-06-05 18:31:04,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:04,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:04,752 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:04,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:04,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898881325] [2021-06-05 18:31:04,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898881325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:04,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633869480] [2021-06-05 18:31:04,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:04,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-05 18:31:04,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:04,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 18:31:04,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:05,074 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:05,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633869480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:05,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:05,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-05 18:31:05,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121744906] [2021-06-05 18:31:05,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:31:05,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:05,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:31:05,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:31:05,074 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:06,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:06,246 INFO L93 Difference]: Finished difference Result 7421 states and 19897 transitions. [2021-06-05 18:31:06,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 18:31:06,246 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:31:06,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:06,254 INFO L225 Difference]: With dead ends: 7421 [2021-06-05 18:31:06,254 INFO L226 Difference]: Without dead ends: 7151 [2021-06-05 18:31:06,255 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2113 ImplicationChecksByTransitivity, 1163.3ms TimeCoverageRelationStatistics Valid=2149, Invalid=6041, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 18:31:06,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7151 states. [2021-06-05 18:31:06,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7151 to 5978. [2021-06-05 18:31:06,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:06,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:31:06,315 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:31:06,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:06,316 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:31:06,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:06,316 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:31:06,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:31:06,320 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:06,320 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:31:06,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable461 [2021-06-05 18:31:06,520 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:06,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:06,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1150674006, now seen corresponding path program 454 times [2021-06-05 18:31:06,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:06,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940111839] [2021-06-05 18:31:06,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:06,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:06,845 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:06,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:06,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940111839] [2021-06-05 18:31:06,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940111839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:06,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852788923] [2021-06-05 18:31:06,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:06,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:31:06,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:06,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:31:06,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:07,144 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:07,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852788923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:07,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:07,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-05 18:31:07,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417404034] [2021-06-05 18:31:07,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:31:07,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:07,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:31:07,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1114, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:31:07,145 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:08,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:08,715 INFO L93 Difference]: Finished difference Result 7371 states and 19797 transitions. [2021-06-05 18:31:08,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 18:31:08,716 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:31:08,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:08,723 INFO L225 Difference]: With dead ends: 7371 [2021-06-05 18:31:08,723 INFO L226 Difference]: Without dead ends: 7101 [2021-06-05 18:31:08,723 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2299 ImplicationChecksByTransitivity, 1532.8ms TimeCoverageRelationStatistics Valid=2326, Invalid=6604, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 18:31:08,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7101 states. [2021-06-05 18:31:08,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7101 to 5978. [2021-06-05 18:31:08,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:08,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:31:08,778 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:31:08,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:08,779 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:31:08,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:08,779 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:31:08,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:31:08,783 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:08,783 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:31:08,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:08,983 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:08,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:08,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1065639268, now seen corresponding path program 455 times [2021-06-05 18:31:08,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:08,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084223872] [2021-06-05 18:31:08,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:09,305 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:09,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:09,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084223872] [2021-06-05 18:31:09,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084223872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:09,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674233533] [2021-06-05 18:31:09,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:09,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 18:31:09,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:09,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:31:09,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:09,593 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:09,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674233533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:09,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:09,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-05 18:31:09,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384604669] [2021-06-05 18:31:09,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:31:09,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:09,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:31:09,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:31:09,594 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:10,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:10,797 INFO L93 Difference]: Finished difference Result 7321 states and 19697 transitions. [2021-06-05 18:31:10,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 18:31:10,798 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:31:10,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:10,804 INFO L225 Difference]: With dead ends: 7321 [2021-06-05 18:31:10,804 INFO L226 Difference]: Without dead ends: 7051 [2021-06-05 18:31:10,804 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2254 ImplicationChecksByTransitivity, 1205.2ms TimeCoverageRelationStatistics Valid=2319, Invalid=6237, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 18:31:10,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7051 states. [2021-06-05 18:31:10,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7051 to 5978. [2021-06-05 18:31:10,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:10,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:31:10,859 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:31:10,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:10,859 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:31:10,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:10,859 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:31:10,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:31:10,863 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:10,863 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:31:11,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable463,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:11,064 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:11,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:11,064 INFO L82 PathProgramCache]: Analyzing trace with hash 997488212, now seen corresponding path program 456 times [2021-06-05 18:31:11,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:11,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178152269] [2021-06-05 18:31:11,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:11,378 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:11,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:11,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178152269] [2021-06-05 18:31:11,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178152269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:11,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108375404] [2021-06-05 18:31:11,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:11,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 18:31:11,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:11,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 18:31:11,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:11,675 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:11,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108375404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:11,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:11,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-05 18:31:11,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558121328] [2021-06-05 18:31:11,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:31:11,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:11,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:31:11,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1096, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:31:11,676 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:13,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:13,035 INFO L93 Difference]: Finished difference Result 7271 states and 19597 transitions. [2021-06-05 18:31:13,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 18:31:13,036 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:31:13,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:13,043 INFO L225 Difference]: With dead ends: 7271 [2021-06-05 18:31:13,043 INFO L226 Difference]: Without dead ends: 7001 [2021-06-05 18:31:13,044 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2251 ImplicationChecksByTransitivity, 1346.3ms TimeCoverageRelationStatistics Valid=2158, Invalid=6772, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 18:31:13,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7001 states. [2021-06-05 18:31:13,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7001 to 5978. [2021-06-05 18:31:13,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:13,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:31:13,116 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:31:13,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:13,116 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:31:13,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:13,116 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:31:13,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:31:13,120 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:13,120 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:31:13,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable464,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:13,321 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:13,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:13,321 INFO L82 PathProgramCache]: Analyzing trace with hash -299480862, now seen corresponding path program 457 times [2021-06-05 18:31:13,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:13,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747668161] [2021-06-05 18:31:13,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:13,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:13,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:13,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747668161] [2021-06-05 18:31:13,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747668161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:13,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597173118] [2021-06-05 18:31:13,641 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:13,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:13,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:31:13,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:13,907 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:13,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597173118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:13,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:13,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-05 18:31:13,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951494872] [2021-06-05 18:31:13,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:31:13,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:13,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:31:13,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:31:13,908 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:15,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:15,186 INFO L93 Difference]: Finished difference Result 7221 states and 19497 transitions. [2021-06-05 18:31:15,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 18:31:15,186 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:31:15,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:15,194 INFO L225 Difference]: With dead ends: 7221 [2021-06-05 18:31:15,194 INFO L226 Difference]: Without dead ends: 6951 [2021-06-05 18:31:15,195 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2399 ImplicationChecksByTransitivity, 1237.9ms TimeCoverageRelationStatistics Valid=2505, Invalid=6425, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 18:31:15,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6951 states. [2021-06-05 18:31:15,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6951 to 5978. [2021-06-05 18:31:15,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:15,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:31:15,253 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:31:15,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:15,253 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:31:15,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:15,254 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:31:15,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:31:15,258 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:15,258 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:31:15,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2021-06-05 18:31:15,458 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:15,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:15,458 INFO L82 PathProgramCache]: Analyzing trace with hash 130272722, now seen corresponding path program 458 times [2021-06-05 18:31:15,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:15,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970647007] [2021-06-05 18:31:15,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:15,801 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:15,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:15,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970647007] [2021-06-05 18:31:15,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970647007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:15,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160368358] [2021-06-05 18:31:15,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:15,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:31:15,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:15,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:31:15,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:16,079 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:16,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160368358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:16,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:16,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-05 18:31:16,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529650154] [2021-06-05 18:31:16,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:31:16,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:16,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:31:16,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:31:16,080 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:17,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:17,742 INFO L93 Difference]: Finished difference Result 7679 states and 20763 transitions. [2021-06-05 18:31:17,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 18:31:17,742 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:31:17,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:17,750 INFO L225 Difference]: With dead ends: 7679 [2021-06-05 18:31:17,750 INFO L226 Difference]: Without dead ends: 7056 [2021-06-05 18:31:17,751 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2722 ImplicationChecksByTransitivity, 1579.9ms TimeCoverageRelationStatistics Valid=2721, Invalid=7379, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 18:31:17,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7056 states. [2021-06-05 18:31:17,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7056 to 5888. [2021-06-05 18:31:17,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5888 states, 5887 states have (on average 2.8279259385085784) internal successors, (16648), 5887 states have internal predecessors, (16648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:17,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5888 states to 5888 states and 16648 transitions. [2021-06-05 18:31:17,820 INFO L78 Accepts]: Start accepts. Automaton has 5888 states and 16648 transitions. Word has length 180 [2021-06-05 18:31:17,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:17,820 INFO L482 AbstractCegarLoop]: Abstraction has 5888 states and 16648 transitions. [2021-06-05 18:31:17,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:17,820 INFO L276 IsEmpty]: Start isEmpty. Operand 5888 states and 16648 transitions. [2021-06-05 18:31:17,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:31:17,824 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:17,824 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:31:18,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-05 18:31:18,025 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:18,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:18,025 INFO L82 PathProgramCache]: Analyzing trace with hash 72538592, now seen corresponding path program 459 times [2021-06-05 18:31:18,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:18,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970158749] [2021-06-05 18:31:18,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:18,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:18,369 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:18,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:18,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970158749] [2021-06-05 18:31:18,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970158749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:18,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604918766] [2021-06-05 18:31:18,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:18,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-05 18:31:18,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:18,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:31:18,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:18,674 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:18,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604918766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:18,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:18,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-05 18:31:18,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716619402] [2021-06-05 18:31:18,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:31:18,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:18,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:31:18,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=979, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:31:18,674 INFO L87 Difference]: Start difference. First operand 5888 states and 16648 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:20,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:20,045 INFO L93 Difference]: Finished difference Result 7908 states and 21481 transitions. [2021-06-05 18:31:20,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 18:31:20,046 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:31:20,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:20,055 INFO L225 Difference]: With dead ends: 7908 [2021-06-05 18:31:20,055 INFO L226 Difference]: Without dead ends: 7638 [2021-06-05 18:31:20,056 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2547 ImplicationChecksByTransitivity, 1303.7ms TimeCoverageRelationStatistics Valid=2708, Invalid=6604, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 18:31:20,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7638 states. [2021-06-05 18:31:20,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7638 to 6068. [2021-06-05 18:31:20,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6068 states, 6067 states have (on average 2.836162848195154) internal successors, (17207), 6067 states have internal predecessors, (17207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:20,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6068 states to 6068 states and 17207 transitions. [2021-06-05 18:31:20,121 INFO L78 Accepts]: Start accepts. Automaton has 6068 states and 17207 transitions. Word has length 180 [2021-06-05 18:31:20,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:20,121 INFO L482 AbstractCegarLoop]: Abstraction has 6068 states and 17207 transitions. [2021-06-05 18:31:20,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:20,121 INFO L276 IsEmpty]: Start isEmpty. Operand 6068 states and 17207 transitions. [2021-06-05 18:31:20,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:31:20,125 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:20,125 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:31:20,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:20,325 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:20,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:20,326 INFO L82 PathProgramCache]: Analyzing trace with hash 94881842, now seen corresponding path program 460 times [2021-06-05 18:31:20,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:20,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824190801] [2021-06-05 18:31:20,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:20,654 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:20,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:20,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824190801] [2021-06-05 18:31:20,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824190801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:20,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430729409] [2021-06-05 18:31:20,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:20,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:31:20,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:20,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:31:20,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:20,963 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:20,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430729409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:20,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:20,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-05 18:31:20,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903883368] [2021-06-05 18:31:20,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:31:20,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:20,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:31:20,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1048, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:31:20,963 INFO L87 Difference]: Start difference. First operand 6068 states and 17207 transitions. Second operand has 37 states, 37 states have (on average 4.945945945945946) internal successors, (183), 37 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:22,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:22,690 INFO L93 Difference]: Finished difference Result 7851 states and 21341 transitions. [2021-06-05 18:31:22,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 18:31:22,691 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.945945945945946) internal successors, (183), 37 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:31:22,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:22,698 INFO L225 Difference]: With dead ends: 7851 [2021-06-05 18:31:22,698 INFO L226 Difference]: Without dead ends: 7276 [2021-06-05 18:31:22,699 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2954 ImplicationChecksByTransitivity, 1652.2ms TimeCoverageRelationStatistics Valid=2964, Invalid=7748, Unknown=0, NotChecked=0, Total=10712 [2021-06-05 18:31:22,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7276 states. [2021-06-05 18:31:22,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7276 to 6103. [2021-06-05 18:31:22,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:22,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-05 18:31:22,759 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 180 [2021-06-05 18:31:22,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:22,759 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-05 18:31:22,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.945945945945946) internal successors, (183), 37 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:22,759 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-05 18:31:22,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:22,764 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:22,764 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:31:22,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-06-05 18:31:22,964 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:22,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:22,964 INFO L82 PathProgramCache]: Analyzing trace with hash -730740019, now seen corresponding path program 461 times [2021-06-05 18:31:22,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:22,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652848963] [2021-06-05 18:31:22,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:23,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:23,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:23,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652848963] [2021-06-05 18:31:23,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652848963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:23,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754154129] [2021-06-05 18:31:23,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:23,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 18:31:23,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:23,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:31:23,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:23,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754154129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:23,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:23,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-05 18:31:23,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286888104] [2021-06-05 18:31:23,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:31:23,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:23,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:31:23,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=979, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:31:23,670 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:24,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:24,463 INFO L93 Difference]: Finished difference Result 7946 states and 21097 transitions. [2021-06-05 18:31:24,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 18:31:24,463 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-05 18:31:24,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:24,471 INFO L225 Difference]: With dead ends: 7946 [2021-06-05 18:31:24,471 INFO L226 Difference]: Without dead ends: 7676 [2021-06-05 18:31:24,472 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 903.4ms TimeCoverageRelationStatistics Valid=1382, Invalid=3730, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 18:31:24,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7676 states. [2021-06-05 18:31:24,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7676 to 6103. [2021-06-05 18:31:24,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:24,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-05 18:31:24,533 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-05 18:31:24,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:24,533 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-05 18:31:24,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:24,533 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-05 18:31:24,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:24,537 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:24,537 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:31:24,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 465 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-06-05 18:31:24,738 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:24,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:24,738 INFO L82 PathProgramCache]: Analyzing trace with hash 2000868285, now seen corresponding path program 462 times [2021-06-05 18:31:24,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:24,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428483339] [2021-06-05 18:31:24,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:25,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:25,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:25,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428483339] [2021-06-05 18:31:25,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428483339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:25,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551006082] [2021-06-05 18:31:25,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:25,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 18:31:25,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:25,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:31:25,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:25,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:25,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551006082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:25,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:25,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-05 18:31:25,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789563397] [2021-06-05 18:31:25,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:31:25,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:25,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:31:25,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1062, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:31:25,474 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:26,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:26,339 INFO L93 Difference]: Finished difference Result 8641 states and 22487 transitions. [2021-06-05 18:31:26,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:31:26,340 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-05 18:31:26,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:26,346 INFO L225 Difference]: With dead ends: 8641 [2021-06-05 18:31:26,346 INFO L226 Difference]: Without dead ends: 8371 [2021-06-05 18:31:26,347 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 989.4ms TimeCoverageRelationStatistics Valid=1453, Invalid=4097, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 18:31:26,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8371 states. [2021-06-05 18:31:26,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8371 to 6103. [2021-06-05 18:31:26,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:26,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-05 18:31:26,407 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-05 18:31:26,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:26,407 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-05 18:31:26,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:26,407 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-05 18:31:26,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:26,412 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:26,412 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:31:26,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,466 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:26,612 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:26,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:26,612 INFO L82 PathProgramCache]: Analyzing trace with hash -601344949, now seen corresponding path program 463 times [2021-06-05 18:31:26,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:26,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650013634] [2021-06-05 18:31:26,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:26,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:27,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:27,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:27,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650013634] [2021-06-05 18:31:27,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650013634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:27,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104321931] [2021-06-05 18:31:27,000 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:27,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:27,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:31:27,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:27,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:27,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104321931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:27,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:27,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-05 18:31:27,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406685244] [2021-06-05 18:31:27,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:31:27,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:27,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:31:27,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:31:27,271 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:28,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:28,098 INFO L93 Difference]: Finished difference Result 8596 states and 22397 transitions. [2021-06-05 18:31:28,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:31:28,098 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-05 18:31:28,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:28,106 INFO L225 Difference]: With dead ends: 8596 [2021-06-05 18:31:28,106 INFO L226 Difference]: Without dead ends: 8326 [2021-06-05 18:31:28,107 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 906.9ms TimeCoverageRelationStatistics Valid=1441, Invalid=4109, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 18:31:28,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8326 states. [2021-06-05 18:31:28,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8326 to 6103. [2021-06-05 18:31:28,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:28,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-05 18:31:28,168 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-05 18:31:28,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:28,168 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-05 18:31:28,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:28,168 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-05 18:31:28,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:28,173 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:28,173 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:31:28,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:28,373 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:28,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:28,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1542280901, now seen corresponding path program 464 times [2021-06-05 18:31:28,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:28,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111860510] [2021-06-05 18:31:28,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:28,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:28,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:28,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111860510] [2021-06-05 18:31:28,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111860510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:28,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914960823] [2021-06-05 18:31:28,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:28,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:31:28,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:28,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:31:28,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:29,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:29,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914960823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:29,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:29,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-05 18:31:29,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750562931] [2021-06-05 18:31:29,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:31:29,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:29,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:31:29,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:31:29,131 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:29,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:29,956 INFO L93 Difference]: Finished difference Result 8546 states and 22297 transitions. [2021-06-05 18:31:29,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:31:29,957 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-05 18:31:29,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:29,966 INFO L225 Difference]: With dead ends: 8546 [2021-06-05 18:31:29,966 INFO L226 Difference]: Without dead ends: 8276 [2021-06-05 18:31:29,967 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1055.0ms TimeCoverageRelationStatistics Valid=1463, Invalid=4389, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 18:31:29,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8276 states. [2021-06-05 18:31:30,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8276 to 6103. [2021-06-05 18:31:30,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:30,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-05 18:31:30,032 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-05 18:31:30,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:30,032 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-05 18:31:30,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:30,032 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-05 18:31:30,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:30,036 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:30,036 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:31:30,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:30,236 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:30,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:30,237 INFO L82 PathProgramCache]: Analyzing trace with hash 89047881, now seen corresponding path program 465 times [2021-06-05 18:31:30,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:30,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17918494] [2021-06-05 18:31:30,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:30,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:30,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17918494] [2021-06-05 18:31:30,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17918494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:30,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271998082] [2021-06-05 18:31:30,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:30,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-05 18:31:30,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:30,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 62 conjunts are in the unsatisfiable core [2021-06-05 18:31:30,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:30,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271998082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:30,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:30,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-05 18:31:30,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023015279] [2021-06-05 18:31:30,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:31:30,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:30,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:31:30,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:31:30,886 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:31,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:31,723 INFO L93 Difference]: Finished difference Result 8496 states and 22197 transitions. [2021-06-05 18:31:31,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:31:31,724 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-05 18:31:31,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:31,733 INFO L225 Difference]: With dead ends: 8496 [2021-06-05 18:31:31,733 INFO L226 Difference]: Without dead ends: 8226 [2021-06-05 18:31:31,734 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 937.5ms TimeCoverageRelationStatistics Valid=1465, Invalid=4387, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 18:31:31,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8226 states. [2021-06-05 18:31:31,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8226 to 6103. [2021-06-05 18:31:31,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:31,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-05 18:31:31,796 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-05 18:31:31,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:31,797 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-05 18:31:31,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:31,797 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-05 18:31:31,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:31,801 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:31,801 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:31:32,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:32,002 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:32,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:32,002 INFO L82 PathProgramCache]: Analyzing trace with hash -756440007, now seen corresponding path program 466 times [2021-06-05 18:31:32,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:32,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997176592] [2021-06-05 18:31:32,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:32,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:32,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:32,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997176592] [2021-06-05 18:31:32,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997176592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:32,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981675214] [2021-06-05 18:31:32,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:32,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:31:32,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:32,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:31:32,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:32,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981675214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:32,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:32,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-05 18:31:32,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126763103] [2021-06-05 18:31:32,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:31:32,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:32,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:31:32,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:31:32,691 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:33,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:33,654 INFO L93 Difference]: Finished difference Result 8446 states and 22097 transitions. [2021-06-05 18:31:33,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 18:31:33,654 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-05 18:31:33,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:33,662 INFO L225 Difference]: With dead ends: 8446 [2021-06-05 18:31:33,662 INFO L226 Difference]: Without dead ends: 8176 [2021-06-05 18:31:33,663 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 1068.1ms TimeCoverageRelationStatistics Valid=1489, Invalid=4673, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 18:31:33,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8176 states. [2021-06-05 18:31:33,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8176 to 6103. [2021-06-05 18:31:33,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:33,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-05 18:31:33,748 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-05 18:31:33,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:33,748 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-05 18:31:33,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:33,749 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-05 18:31:33,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:33,753 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:33,753 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:31:33,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-06-05 18:31:33,953 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:33,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:33,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1632524231, now seen corresponding path program 467 times [2021-06-05 18:31:33,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:33,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005856651] [2021-06-05 18:31:33,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:33,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:34,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:34,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:34,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005856651] [2021-06-05 18:31:34,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005856651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:34,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439056542] [2021-06-05 18:31:34,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:34,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 18:31:34,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:34,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:31:34,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:34,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439056542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:34,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:34,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-05 18:31:34,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840615861] [2021-06-05 18:31:34,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:31:34,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:34,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:31:34,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:31:34,598 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:35,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:35,427 INFO L93 Difference]: Finished difference Result 8396 states and 21997 transitions. [2021-06-05 18:31:35,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 18:31:35,428 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-05 18:31:35,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:35,436 INFO L225 Difference]: With dead ends: 8396 [2021-06-05 18:31:35,436 INFO L226 Difference]: Without dead ends: 8126 [2021-06-05 18:31:35,437 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 962.2ms TimeCoverageRelationStatistics Valid=1505, Invalid=4657, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 18:31:35,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8126 states. [2021-06-05 18:31:35,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8126 to 6103. [2021-06-05 18:31:35,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:35,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-05 18:31:35,501 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-05 18:31:35,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:35,501 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-05 18:31:35,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:35,501 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-05 18:31:35,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:35,505 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:35,505 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:31:35,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-06-05 18:31:35,706 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:35,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:35,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1779391305, now seen corresponding path program 468 times [2021-06-05 18:31:35,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:35,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067323428] [2021-06-05 18:31:35,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:35,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:36,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:36,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:36,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067323428] [2021-06-05 18:31:36,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067323428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:36,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444778474] [2021-06-05 18:31:36,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:36,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 18:31:36,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:36,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:31:36,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:36,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:36,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444778474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:36,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:36,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-05 18:31:36,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830296237] [2021-06-05 18:31:36,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:31:36,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:36,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:31:36,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1122, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:31:36,418 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:37,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:37,400 INFO L93 Difference]: Finished difference Result 8346 states and 21897 transitions. [2021-06-05 18:31:37,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 18:31:37,401 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-05 18:31:37,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:37,409 INFO L225 Difference]: With dead ends: 8346 [2021-06-05 18:31:37,409 INFO L226 Difference]: Without dead ends: 8076 [2021-06-05 18:31:37,410 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1411 ImplicationChecksByTransitivity, 1076.4ms TimeCoverageRelationStatistics Valid=1531, Invalid=4949, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 18:31:37,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8076 states. [2021-06-05 18:31:37,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8076 to 6103. [2021-06-05 18:31:37,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:37,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-05 18:31:37,474 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-05 18:31:37,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:37,475 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-05 18:31:37,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:37,475 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-05 18:31:37,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:37,479 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:37,479 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:31:37,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 472 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-06-05 18:31:37,679 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:37,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:37,679 INFO L82 PathProgramCache]: Analyzing trace with hash 623366597, now seen corresponding path program 469 times [2021-06-05 18:31:37,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:37,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696704490] [2021-06-05 18:31:37,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:37,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:38,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:38,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:38,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696704490] [2021-06-05 18:31:38,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696704490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:38,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875633311] [2021-06-05 18:31:38,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:38,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:38,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:31:38,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:38,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:38,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875633311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:38,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:38,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-05 18:31:38,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126578671] [2021-06-05 18:31:38,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:31:38,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:38,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:31:38,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:31:38,305 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:39,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:39,198 INFO L93 Difference]: Finished difference Result 8296 states and 21797 transitions. [2021-06-05 18:31:39,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 18:31:39,198 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-05 18:31:39,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:39,206 INFO L225 Difference]: With dead ends: 8296 [2021-06-05 18:31:39,206 INFO L226 Difference]: Without dead ends: 8026 [2021-06-05 18:31:39,206 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1505 ImplicationChecksByTransitivity, 998.4ms TimeCoverageRelationStatistics Valid=1561, Invalid=4919, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 18:31:39,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8026 states. [2021-06-05 18:31:39,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8026 to 6103. [2021-06-05 18:31:39,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:39,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-05 18:31:39,264 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-05 18:31:39,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:39,264 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-05 18:31:39,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:39,264 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-05 18:31:39,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:39,268 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:39,268 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:31:39,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 473 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-06-05 18:31:39,469 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:39,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:39,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1830253899, now seen corresponding path program 470 times [2021-06-05 18:31:39,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:39,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157713720] [2021-06-05 18:31:39,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:39,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:39,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:39,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:39,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157713720] [2021-06-05 18:31:39,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157713720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:39,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926895578] [2021-06-05 18:31:39,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:39,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:31:39,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:39,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:31:39,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:40,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:40,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926895578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:40,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:40,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-05 18:31:40,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557560637] [2021-06-05 18:31:40,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:31:40,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:40,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:31:40,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:31:40,133 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:41,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:41,151 INFO L93 Difference]: Finished difference Result 8246 states and 21697 transitions. [2021-06-05 18:31:41,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 18:31:41,151 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-05 18:31:41,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:41,159 INFO L225 Difference]: With dead ends: 8246 [2021-06-05 18:31:41,159 INFO L226 Difference]: Without dead ends: 7976 [2021-06-05 18:31:41,160 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 1116.8ms TimeCoverageRelationStatistics Valid=1589, Invalid=5217, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 18:31:41,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7976 states. [2021-06-05 18:31:41,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7976 to 6103. [2021-06-05 18:31:41,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:41,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-05 18:31:41,221 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-05 18:31:41,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:41,221 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-05 18:31:41,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:41,221 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-05 18:31:41,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:41,250 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:41,250 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:31:41,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-05 18:31:41,451 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:41,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:41,451 INFO L82 PathProgramCache]: Analyzing trace with hash -948694717, now seen corresponding path program 471 times [2021-06-05 18:31:41,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:41,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827392577] [2021-06-05 18:31:41,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:41,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:41,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:41,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827392577] [2021-06-05 18:31:41,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827392577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:41,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574596861] [2021-06-05 18:31:41,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:41,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-05 18:31:41,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:41,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 56 conjunts are in the unsatisfiable core [2021-06-05 18:31:41,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:42,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:42,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574596861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:42,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:42,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-05 18:31:42,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263227992] [2021-06-05 18:31:42,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:31:42,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:42,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:31:42,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:31:42,083 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:42,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:42,997 INFO L93 Difference]: Finished difference Result 8196 states and 21597 transitions. [2021-06-05 18:31:42,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 18:31:42,997 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-05 18:31:42,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:43,005 INFO L225 Difference]: With dead ends: 8196 [2021-06-05 18:31:43,005 INFO L226 Difference]: Without dead ends: 7926 [2021-06-05 18:31:43,006 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1632 ImplicationChecksByTransitivity, 1006.0ms TimeCoverageRelationStatistics Valid=1633, Invalid=5173, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 18:31:43,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7926 states. [2021-06-05 18:31:43,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7926 to 6103. [2021-06-05 18:31:43,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:43,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-05 18:31:43,069 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-05 18:31:43,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:43,069 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-05 18:31:43,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:43,069 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-05 18:31:43,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:43,073 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:43,073 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:31:43,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:43,274 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:43,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:43,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1591069133, now seen corresponding path program 472 times [2021-06-05 18:31:43,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:43,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274707561] [2021-06-05 18:31:43,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:43,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:43,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:43,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274707561] [2021-06-05 18:31:43,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274707561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:43,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647586733] [2021-06-05 18:31:43,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:43,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:31:43,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:43,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:31:43,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:43,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:43,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647586733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:43,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:43,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-05 18:31:43,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408637146] [2021-06-05 18:31:43,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:31:43,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:43,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:31:43,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:31:43,924 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:44,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:44,971 INFO L93 Difference]: Finished difference Result 8146 states and 21497 transitions. [2021-06-05 18:31:44,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 18:31:44,971 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-05 18:31:44,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:44,979 INFO L225 Difference]: With dead ends: 8146 [2021-06-05 18:31:44,979 INFO L226 Difference]: Without dead ends: 7876 [2021-06-05 18:31:44,980 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1667 ImplicationChecksByTransitivity, 1128.2ms TimeCoverageRelationStatistics Valid=1663, Invalid=5477, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 18:31:44,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7876 states. [2021-06-05 18:31:45,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7876 to 6103. [2021-06-05 18:31:45,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:45,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-05 18:31:45,040 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-05 18:31:45,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:45,040 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-05 18:31:45,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:45,040 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-05 18:31:45,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:45,044 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:45,044 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:31:45,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,476 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:45,245 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:45,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:45,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1637616063, now seen corresponding path program 473 times [2021-06-05 18:31:45,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:45,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125751332] [2021-06-05 18:31:45,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:45,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:45,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125751332] [2021-06-05 18:31:45,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125751332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:45,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306958211] [2021-06-05 18:31:45,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:45,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 18:31:45,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:45,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:31:45,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:45,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:45,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306958211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:45,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:45,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-05 18:31:45,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088759972] [2021-06-05 18:31:45,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:31:45,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:45,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:31:45,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:31:45,851 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:46,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:46,814 INFO L93 Difference]: Finished difference Result 8096 states and 21397 transitions. [2021-06-05 18:31:46,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 18:31:46,814 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-05 18:31:46,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:46,822 INFO L225 Difference]: With dead ends: 8096 [2021-06-05 18:31:46,822 INFO L226 Difference]: Without dead ends: 7826 [2021-06-05 18:31:46,822 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 1040.1ms TimeCoverageRelationStatistics Valid=1721, Invalid=5419, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 18:31:46,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7826 states. [2021-06-05 18:31:46,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7826 to 6103. [2021-06-05 18:31:46,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:46,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-05 18:31:46,882 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-05 18:31:46,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:46,882 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-05 18:31:46,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:46,882 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-05 18:31:46,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:46,886 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:46,886 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:31:47,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:47,087 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:47,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:47,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1738966833, now seen corresponding path program 474 times [2021-06-05 18:31:47,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:47,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469328677] [2021-06-05 18:31:47,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:47,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:47,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:47,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:47,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469328677] [2021-06-05 18:31:47,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469328677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:47,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305411554] [2021-06-05 18:31:47,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:47,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 18:31:47,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:47,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:31:47,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:47,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:47,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305411554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:47,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:47,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-05 18:31:47,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49503374] [2021-06-05 18:31:47,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:31:47,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:47,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:31:47,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:31:47,728 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:48,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:48,886 INFO L93 Difference]: Finished difference Result 8046 states and 21297 transitions. [2021-06-05 18:31:48,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 18:31:48,887 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-05 18:31:48,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:48,895 INFO L225 Difference]: With dead ends: 8046 [2021-06-05 18:31:48,895 INFO L226 Difference]: Without dead ends: 7776 [2021-06-05 18:31:48,896 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 1221.9ms TimeCoverageRelationStatistics Valid=1753, Invalid=5729, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 18:31:48,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7776 states. [2021-06-05 18:31:48,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7776 to 6103. [2021-06-05 18:31:48,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:48,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-05 18:31:48,975 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-05 18:31:48,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:48,975 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-05 18:31:48,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:48,975 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-05 18:31:48,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:48,979 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:48,979 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:31:49,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,478 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:49,180 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:49,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:49,180 INFO L82 PathProgramCache]: Analyzing trace with hash -37723969, now seen corresponding path program 475 times [2021-06-05 18:31:49,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:49,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786812499] [2021-06-05 18:31:49,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:49,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:49,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:49,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:49,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786812499] [2021-06-05 18:31:49,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786812499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:49,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177319888] [2021-06-05 18:31:49,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:49,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:49,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:31:49,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:49,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177319888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:49,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:49,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-05 18:31:49,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600003550] [2021-06-05 18:31:49,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:31:49,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:49,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:31:49,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:31:49,783 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:50,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:50,790 INFO L93 Difference]: Finished difference Result 7996 states and 21197 transitions. [2021-06-05 18:31:50,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 18:31:50,791 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-05 18:31:50,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:50,798 INFO L225 Difference]: With dead ends: 7996 [2021-06-05 18:31:50,798 INFO L226 Difference]: Without dead ends: 7726 [2021-06-05 18:31:50,799 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1898 ImplicationChecksByTransitivity, 1061.5ms TimeCoverageRelationStatistics Valid=1825, Invalid=5657, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 18:31:50,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7726 states. [2021-06-05 18:31:50,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7726 to 6103. [2021-06-05 18:31:50,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:50,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-05 18:31:50,858 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-05 18:31:50,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:50,859 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-05 18:31:50,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:50,859 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-05 18:31:50,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:50,863 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:50,863 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:31:51,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,479 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:51,063 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:51,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:51,063 INFO L82 PathProgramCache]: Analyzing trace with hash 2061917615, now seen corresponding path program 476 times [2021-06-05 18:31:51,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:51,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471262482] [2021-06-05 18:31:51,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:51,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:51,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:51,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:51,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471262482] [2021-06-05 18:31:51,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471262482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:51,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130121871] [2021-06-05 18:31:51,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:51,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:31:51,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:51,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:31:51,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:51,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:51,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130121871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:51,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:51,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-05 18:31:51,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439077505] [2021-06-05 18:31:51,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:31:51,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:51,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:31:51,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:31:51,747 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:52,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:52,990 INFO L93 Difference]: Finished difference Result 7946 states and 21097 transitions. [2021-06-05 18:31:52,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 18:31:52,990 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-05 18:31:52,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:52,997 INFO L225 Difference]: With dead ends: 7946 [2021-06-05 18:31:52,998 INFO L226 Difference]: Without dead ends: 7676 [2021-06-05 18:31:52,998 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1939 ImplicationChecksByTransitivity, 1317.1ms TimeCoverageRelationStatistics Valid=1859, Invalid=5973, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 18:31:53,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7676 states. [2021-06-05 18:31:53,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7676 to 6103. [2021-06-05 18:31:53,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:53,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-05 18:31:53,058 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-05 18:31:53,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:53,058 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-05 18:31:53,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:53,058 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-05 18:31:53,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:53,062 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:53,062 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:31:53,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,480 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:53,262 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:53,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:53,263 INFO L82 PathProgramCache]: Analyzing trace with hash -722849603, now seen corresponding path program 477 times [2021-06-05 18:31:53,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:53,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468683971] [2021-06-05 18:31:53,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:53,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:53,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:53,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468683971] [2021-06-05 18:31:53,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468683971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:53,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958039086] [2021-06-05 18:31:53,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:53,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-05 18:31:53,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:53,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 18:31:53,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:53,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:53,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958039086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:53,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:53,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-05 18:31:53,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496648282] [2021-06-05 18:31:53,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:31:53,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:53,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:31:53,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:31:53,860 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:54,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:54,937 INFO L93 Difference]: Finished difference Result 7896 states and 20997 transitions. [2021-06-05 18:31:54,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 18:31:54,937 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-05 18:31:54,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:54,945 INFO L225 Difference]: With dead ends: 7896 [2021-06-05 18:31:54,945 INFO L226 Difference]: Without dead ends: 7626 [2021-06-05 18:31:54,945 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 1116.3ms TimeCoverageRelationStatistics Valid=1945, Invalid=5887, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 18:31:54,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7626 states. [2021-06-05 18:31:54,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7626 to 6103. [2021-06-05 18:31:54,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:55,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-05 18:31:55,005 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-05 18:31:55,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:55,005 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-05 18:31:55,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:55,006 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-05 18:31:55,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:55,010 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:55,010 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:31:55,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable485,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:55,210 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:55,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:55,211 INFO L82 PathProgramCache]: Analyzing trace with hash -83191379, now seen corresponding path program 478 times [2021-06-05 18:31:55,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:55,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558697887] [2021-06-05 18:31:55,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:55,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:55,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:55,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:55,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558697887] [2021-06-05 18:31:55,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558697887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:55,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35963665] [2021-06-05 18:31:55,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:55,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:31:55,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:55,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:31:55,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:55,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:55,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35963665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:55,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:55,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-05 18:31:55,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453432037] [2021-06-05 18:31:55,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:31:55,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:55,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:31:55,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:31:55,840 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:57,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:57,111 INFO L93 Difference]: Finished difference Result 7846 states and 20897 transitions. [2021-06-05 18:31:57,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 18:31:57,111 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-05 18:31:57,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:57,118 INFO L225 Difference]: With dead ends: 7846 [2021-06-05 18:31:57,118 INFO L226 Difference]: Without dead ends: 7576 [2021-06-05 18:31:57,119 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 1319.6ms TimeCoverageRelationStatistics Valid=1981, Invalid=6209, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 18:31:57,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7576 states. [2021-06-05 18:31:57,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7576 to 6103. [2021-06-05 18:31:57,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:57,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-05 18:31:57,177 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-05 18:31:57,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:57,177 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-05 18:31:57,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:57,178 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-05 18:31:57,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:57,182 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:57,182 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:31:57,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-06-05 18:31:57,383 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:57,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:57,383 INFO L82 PathProgramCache]: Analyzing trace with hash -858110405, now seen corresponding path program 479 times [2021-06-05 18:31:57,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:57,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888067711] [2021-06-05 18:31:57,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:57,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:57,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:57,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888067711] [2021-06-05 18:31:57,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888067711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:57,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185247422] [2021-06-05 18:31:57,733 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:57,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 18:31:57,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:57,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:31:57,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:57,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185247422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:57,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:57,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-05 18:31:57,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052098540] [2021-06-05 18:31:57,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:31:57,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:57,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:31:57,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:31:57,996 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:59,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:59,095 INFO L93 Difference]: Finished difference Result 7796 states and 20797 transitions. [2021-06-05 18:31:59,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 18:31:59,096 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-05 18:31:59,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:59,103 INFO L225 Difference]: With dead ends: 7796 [2021-06-05 18:31:59,103 INFO L226 Difference]: Without dead ends: 7526 [2021-06-05 18:31:59,104 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2180 ImplicationChecksByTransitivity, 1151.9ms TimeCoverageRelationStatistics Valid=2081, Invalid=6109, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 18:31:59,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7526 states. [2021-06-05 18:31:59,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7526 to 6103. [2021-06-05 18:31:59,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:59,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-05 18:31:59,167 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-05 18:31:59,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:59,167 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-05 18:31:59,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:59,167 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-05 18:31:59,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:59,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:59,172 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:31:59,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable487,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:59,372 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:59,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:59,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1312023765, now seen corresponding path program 480 times [2021-06-05 18:31:59,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:59,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877724857] [2021-06-05 18:31:59,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:59,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:59,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:59,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877724857] [2021-06-05 18:31:59,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877724857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:59,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027482212] [2021-06-05 18:31:59,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:59,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 18:31:59,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:59,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 18:31:59,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:32:00,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:00,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027482212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:00,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:32:00,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-05 18:32:00,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427643541] [2021-06-05 18:32:00,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:32:00,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:32:00,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:32:00,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:32:00,173 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:01,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:32:01,478 INFO L93 Difference]: Finished difference Result 7746 states and 20697 transitions. [2021-06-05 18:32:01,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 18:32:01,479 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-05 18:32:01,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:32:01,486 INFO L225 Difference]: With dead ends: 7746 [2021-06-05 18:32:01,486 INFO L226 Difference]: Without dead ends: 7476 [2021-06-05 18:32:01,487 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2157 ImplicationChecksByTransitivity, 1330.8ms TimeCoverageRelationStatistics Valid=1981, Invalid=6575, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 18:32:01,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7476 states. [2021-06-05 18:32:01,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7476 to 6103. [2021-06-05 18:32:01,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:01,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-05 18:32:01,547 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-05 18:32:01,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:32:01,547 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-05 18:32:01,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:01,547 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-05 18:32:01,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:32:01,551 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:32:01,551 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:32:01,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-06-05 18:32:01,752 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:32:01,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:32:01,752 INFO L82 PathProgramCache]: Analyzing trace with hash -434011847, now seen corresponding path program 481 times [2021-06-05 18:32:01,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:32:01,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065487612] [2021-06-05 18:32:01,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:32:01,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:02,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:02,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:32:02,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065487612] [2021-06-05 18:32:02,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065487612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:02,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324824675] [2021-06-05 18:32:02,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:02,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:02,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:32:02,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:32:02,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:02,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324824675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:02,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:32:02,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-05 18:32:02,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027006313] [2021-06-05 18:32:02,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:32:02,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:32:02,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:32:02,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1049, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:32:02,356 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:03,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:32:03,482 INFO L93 Difference]: Finished difference Result 7696 states and 20597 transitions. [2021-06-05 18:32:03,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 18:32:03,482 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-05 18:32:03,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:32:03,490 INFO L225 Difference]: With dead ends: 7696 [2021-06-05 18:32:03,490 INFO L226 Difference]: Without dead ends: 7426 [2021-06-05 18:32:03,491 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2327 ImplicationChecksByTransitivity, 1139.5ms TimeCoverageRelationStatistics Valid=2233, Invalid=6323, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 18:32:03,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7426 states. [2021-06-05 18:32:03,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7426 to 6103. [2021-06-05 18:32:03,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:03,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-05 18:32:03,559 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-05 18:32:03,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:32:03,559 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-05 18:32:03,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:03,559 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-05 18:32:03,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:32:03,564 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:32:03,564 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:32:03,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable489,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:03,764 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:32:03,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:32:03,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1334066647, now seen corresponding path program 482 times [2021-06-05 18:32:03,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:32:03,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323910200] [2021-06-05 18:32:03,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:32:03,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:04,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:04,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:32:04,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323910200] [2021-06-05 18:32:04,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323910200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:04,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988996269] [2021-06-05 18:32:04,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:04,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:32:04,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:32:04,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:32:04,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:32:04,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:04,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988996269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:04,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:32:04,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-05 18:32:04,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94208133] [2021-06-05 18:32:04,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:32:04,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:32:04,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:32:04,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1122, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:32:04,373 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:05,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:32:05,755 INFO L93 Difference]: Finished difference Result 7646 states and 20497 transitions. [2021-06-05 18:32:05,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 18:32:05,756 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-05 18:32:05,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:32:05,763 INFO L225 Difference]: With dead ends: 7646 [2021-06-05 18:32:05,763 INFO L226 Difference]: Without dead ends: 7376 [2021-06-05 18:32:05,764 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2377 ImplicationChecksByTransitivity, 1396.1ms TimeCoverageRelationStatistics Valid=2273, Invalid=6657, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 18:32:05,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7376 states. [2021-06-05 18:32:05,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7376 to 6103. [2021-06-05 18:32:05,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:05,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-05 18:32:05,823 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-05 18:32:05,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:32:05,823 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-05 18:32:05,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:05,823 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-05 18:32:05,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:32:05,827 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:32:05,827 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:32:06,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable490 [2021-06-05 18:32:06,028 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:32:06,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:32:06,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1763130953, now seen corresponding path program 483 times [2021-06-05 18:32:06,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:32:06,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516880219] [2021-06-05 18:32:06,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:32:06,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:06,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:06,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:32:06,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516880219] [2021-06-05 18:32:06,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516880219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:06,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478630549] [2021-06-05 18:32:06,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:06,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-05 18:32:06,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:32:06,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 18:32:06,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:32:06,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:06,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478630549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:06,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:32:06,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-05 18:32:06,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113971135] [2021-06-05 18:32:06,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:32:06,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:32:06,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:32:06,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1034, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:32:06,619 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:07,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:32:07,901 INFO L93 Difference]: Finished difference Result 7596 states and 20397 transitions. [2021-06-05 18:32:07,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 18:32:07,901 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-05 18:32:07,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:32:07,908 INFO L225 Difference]: With dead ends: 7596 [2021-06-05 18:32:07,908 INFO L226 Difference]: Without dead ends: 7326 [2021-06-05 18:32:07,909 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 1244.8ms TimeCoverageRelationStatistics Valid=2401, Invalid=6529, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 18:32:07,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7326 states. [2021-06-05 18:32:07,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7326 to 6103. [2021-06-05 18:32:07,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:07,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-05 18:32:07,972 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-05 18:32:07,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:32:07,972 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-05 18:32:07,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:07,972 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-05 18:32:07,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:32:07,977 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:32:07,977 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:32:08,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:08,190 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:32:08,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:32:08,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1845653159, now seen corresponding path program 484 times [2021-06-05 18:32:08,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:32:08,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180974020] [2021-06-05 18:32:08,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:32:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:08,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:08,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:32:08,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180974020] [2021-06-05 18:32:08,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180974020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:08,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905283316] [2021-06-05 18:32:08,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:08,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:32:08,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:32:08,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:32:08,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:32:08,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:08,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905283316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:08,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:32:08,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-05 18:32:08,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851000580] [2021-06-05 18:32:08,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:32:08,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:32:08,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:32:08,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:32:08,791 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:10,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:32:10,246 INFO L93 Difference]: Finished difference Result 7546 states and 20297 transitions. [2021-06-05 18:32:10,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 18:32:10,247 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-05 18:32:10,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:32:10,253 INFO L225 Difference]: With dead ends: 7546 [2021-06-05 18:32:10,253 INFO L226 Difference]: Without dead ends: 7276 [2021-06-05 18:32:10,253 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2531 ImplicationChecksByTransitivity, 1427.6ms TimeCoverageRelationStatistics Valid=2443, Invalid=6869, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 18:32:10,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7276 states. [2021-06-05 18:32:10,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7276 to 6103. [2021-06-05 18:32:10,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:10,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-05 18:32:10,309 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-05 18:32:10,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:32:10,309 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-05 18:32:10,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:10,309 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-05 18:32:10,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:32:10,313 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:32:10,313 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:32:10,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,488 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:10,513 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:32:10,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:32:10,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1760618421, now seen corresponding path program 485 times [2021-06-05 18:32:10,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:32:10,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964955261] [2021-06-05 18:32:10,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:32:10,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:10,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:32:10,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964955261] [2021-06-05 18:32:10,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964955261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:10,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593533983] [2021-06-05 18:32:10,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:10,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 18:32:10,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:32:10,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:32:10,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:32:11,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:11,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593533983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:11,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:32:11,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-05 18:32:11,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909701670] [2021-06-05 18:32:11,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:32:11,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:32:11,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:32:11,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:32:11,099 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:12,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:32:12,313 INFO L93 Difference]: Finished difference Result 7496 states and 20197 transitions. [2021-06-05 18:32:12,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 18:32:12,314 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-05 18:32:12,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:32:12,321 INFO L225 Difference]: With dead ends: 7496 [2021-06-05 18:32:12,321 INFO L226 Difference]: Without dead ends: 7226 [2021-06-05 18:32:12,321 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2633 ImplicationChecksByTransitivity, 1203.4ms TimeCoverageRelationStatistics Valid=2585, Invalid=6727, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 18:32:12,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7226 states. [2021-06-05 18:32:12,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7226 to 6103. [2021-06-05 18:32:12,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:12,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-05 18:32:12,381 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-05 18:32:12,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:32:12,381 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-05 18:32:12,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:12,381 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-05 18:32:12,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:32:12,385 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:32:12,385 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:32:12,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:12,585 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:32:12,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:32:12,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1692467365, now seen corresponding path program 486 times [2021-06-05 18:32:12,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:32:12,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215182733] [2021-06-05 18:32:12,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:32:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:12,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:32:12,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215182733] [2021-06-05 18:32:12,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215182733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:12,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227001580] [2021-06-05 18:32:12,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:13,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 18:32:13,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:32:13,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 18:32:13,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:32:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:13,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227001580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:13,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:32:13,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-05 18:32:13,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487866010] [2021-06-05 18:32:13,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:32:13,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:32:13,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:32:13,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:32:13,226 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:14,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:32:14,686 INFO L93 Difference]: Finished difference Result 7446 states and 20097 transitions. [2021-06-05 18:32:14,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 18:32:14,686 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-05 18:32:14,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:32:14,694 INFO L225 Difference]: With dead ends: 7446 [2021-06-05 18:32:14,694 INFO L226 Difference]: Without dead ends: 7176 [2021-06-05 18:32:14,695 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2577 ImplicationChecksByTransitivity, 1422.5ms TimeCoverageRelationStatistics Valid=2392, Invalid=7310, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 18:32:14,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7176 states. [2021-06-05 18:32:14,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7176 to 6103. [2021-06-05 18:32:14,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:14,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-05 18:32:14,753 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-05 18:32:14,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:32:14,753 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-05 18:32:14,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:14,753 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-05 18:32:14,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:32:14,757 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:32:14,758 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:32:14,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable494 [2021-06-05 18:32:14,958 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:32:14,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:32:14,958 INFO L82 PathProgramCache]: Analyzing trace with hash 395498291, now seen corresponding path program 487 times [2021-06-05 18:32:14,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:32:14,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316921680] [2021-06-05 18:32:14,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:32:14,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:15,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:15,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:32:15,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316921680] [2021-06-05 18:32:15,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316921680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:15,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848083604] [2021-06-05 18:32:15,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:15,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:15,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:32:15,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:32:15,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:15,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848083604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:15,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:32:15,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-05 18:32:15,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816571288] [2021-06-05 18:32:15,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:32:15,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:32:15,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:32:15,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=992, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:32:15,561 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:16,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:32:16,833 INFO L93 Difference]: Finished difference Result 7396 states and 19997 transitions. [2021-06-05 18:32:16,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 18:32:16,833 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-05 18:32:16,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:32:16,841 INFO L225 Difference]: With dead ends: 7396 [2021-06-05 18:32:16,841 INFO L226 Difference]: Without dead ends: 7126 [2021-06-05 18:32:16,842 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2792 ImplicationChecksByTransitivity, 1255.1ms TimeCoverageRelationStatistics Valid=2785, Invalid=6917, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 18:32:16,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7126 states. [2021-06-05 18:32:16,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7126 to 6103. [2021-06-05 18:32:16,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:16,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-05 18:32:16,904 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-05 18:32:16,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:32:16,904 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-05 18:32:16,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:16,905 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-05 18:32:16,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:32:16,909 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:32:16,909 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:32:17,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:17,109 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:32:17,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:32:17,110 INFO L82 PathProgramCache]: Analyzing trace with hash 825251875, now seen corresponding path program 488 times [2021-06-05 18:32:17,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:32:17,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664416274] [2021-06-05 18:32:17,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:32:17,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:17,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:17,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:32:17,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664416274] [2021-06-05 18:32:17,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664416274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:17,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036569045] [2021-06-05 18:32:17,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:17,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:32:17,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:32:17,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:32:17,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:32:17,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:17,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036569045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:17,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:32:17,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-05 18:32:17,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755169637] [2021-06-05 18:32:17,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:32:17,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:32:17,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:32:17,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1062, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:32:17,720 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:19,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:32:19,275 INFO L93 Difference]: Finished difference Result 7406 states and 20047 transitions. [2021-06-05 18:32:19,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 18:32:19,275 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-05 18:32:19,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:32:19,282 INFO L225 Difference]: With dead ends: 7406 [2021-06-05 18:32:19,282 INFO L226 Difference]: Without dead ends: 7136 [2021-06-05 18:32:19,283 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 1544.7ms TimeCoverageRelationStatistics Valid=2831, Invalid=7269, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 18:32:19,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7136 states. [2021-06-05 18:32:19,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7136 to 6103. [2021-06-05 18:32:19,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.833169452638479) internal successors, (17288), 6102 states have internal predecessors, (17288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:19,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17288 transitions. [2021-06-05 18:32:19,345 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17288 transitions. Word has length 185 [2021-06-05 18:32:19,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:32:19,345 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17288 transitions. [2021-06-05 18:32:19,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:19,345 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17288 transitions. [2021-06-05 18:32:19,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:32:19,349 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:32:19,349 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:32:19,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-06-05 18:32:19,550 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:32:19,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:32:19,550 INFO L82 PathProgramCache]: Analyzing trace with hash 767517745, now seen corresponding path program 489 times [2021-06-05 18:32:19,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:32:19,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448418768] [2021-06-05 18:32:19,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:32:19,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:19,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:32:19,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448418768] [2021-06-05 18:32:19,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448418768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:19,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087108916] [2021-06-05 18:32:19,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:19,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-05 18:32:19,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:32:19,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:32:19,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:32:20,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:20,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087108916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:20,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:32:20,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-05 18:32:20,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775738006] [2021-06-05 18:32:20,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:32:20,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:32:20,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:32:20,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:32:20,159 INFO L87 Difference]: Start difference. First operand 6103 states and 17288 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:21,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:32:21,493 INFO L93 Difference]: Finished difference Result 8148 states and 22171 transitions. [2021-06-05 18:32:21,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 18:32:21,493 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-05 18:32:21,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:32:21,501 INFO L225 Difference]: With dead ends: 8148 [2021-06-05 18:32:21,501 INFO L226 Difference]: Without dead ends: 7878 [2021-06-05 18:32:21,502 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2954 ImplicationChecksByTransitivity, 1336.5ms TimeCoverageRelationStatistics Valid=3002, Invalid=7098, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 18:32:21,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7878 states. [2021-06-05 18:32:21,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7878 to 6283. [2021-06-05 18:32:21,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6283 states, 6282 states have (on average 2.840974212034384) internal successors, (17847), 6282 states have internal predecessors, (17847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:21,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6283 states to 6283 states and 17847 transitions. [2021-06-05 18:32:21,567 INFO L78 Accepts]: Start accepts. Automaton has 6283 states and 17847 transitions. Word has length 185 [2021-06-05 18:32:21,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:32:21,567 INFO L482 AbstractCegarLoop]: Abstraction has 6283 states and 17847 transitions. [2021-06-05 18:32:21,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:21,567 INFO L276 IsEmpty]: Start isEmpty. Operand 6283 states and 17847 transitions. [2021-06-05 18:32:21,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:32:21,571 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:32:21,571 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:32:21,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 493 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-06-05 18:32:21,772 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:32:21,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:32:21,772 INFO L82 PathProgramCache]: Analyzing trace with hash 789860995, now seen corresponding path program 490 times [2021-06-05 18:32:21,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:32:21,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691141297] [2021-06-05 18:32:21,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:32:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:22,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:22,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:32:22,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691141297] [2021-06-05 18:32:22,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691141297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:22,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348994834] [2021-06-05 18:32:22,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:22,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:32:22,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:32:22,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:32:22,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:32:22,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:22,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348994834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:22,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:32:22,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-05 18:32:22,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629865298] [2021-06-05 18:32:22,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:32:22,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:32:22,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:32:22,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1034, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:32:22,398 INFO L87 Difference]: Start difference. First operand 6283 states and 17847 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:23,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:32:23,943 INFO L93 Difference]: Finished difference Result 7610 states and 20821 transitions. [2021-06-05 18:32:23,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 18:32:23,943 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-05 18:32:23,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:32:23,949 INFO L225 Difference]: With dead ends: 7610 [2021-06-05 18:32:23,949 INFO L226 Difference]: Without dead ends: 7121 [2021-06-05 18:32:23,950 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3017 ImplicationChecksByTransitivity, 1580.0ms TimeCoverageRelationStatistics Valid=3052, Invalid=7454, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 18:32:23,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7121 states. [2021-06-05 18:32:24,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7121 to 6228. [2021-06-05 18:32:24,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6228 states, 6227 states have (on average 2.8397302071623574) internal successors, (17683), 6227 states have internal predecessors, (17683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:24,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6228 states to 6228 states and 17683 transitions. [2021-06-05 18:32:24,014 INFO L78 Accepts]: Start accepts. Automaton has 6228 states and 17683 transitions. Word has length 185 [2021-06-05 18:32:24,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:32:24,014 INFO L482 AbstractCegarLoop]: Abstraction has 6228 states and 17683 transitions. [2021-06-05 18:32:24,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:24,014 INFO L276 IsEmpty]: Start isEmpty. Operand 6228 states and 17683 transitions. [2021-06-05 18:32:24,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:32:24,019 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:32:24,019 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:32:24,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-06-05 18:32:24,219 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:32:24,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:32:24,219 INFO L82 PathProgramCache]: Analyzing trace with hash -719599095, now seen corresponding path program 491 times [2021-06-05 18:32:24,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:32:24,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685735507] [2021-06-05 18:32:24,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:32:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:24,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:24,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:32:24,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685735507] [2021-06-05 18:32:24,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685735507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:24,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434986879] [2021-06-05 18:32:24,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:24,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-05 18:32:24,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:32:24,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 18:32:24,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:32:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:24,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434986879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:24,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:32:24,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 41 [2021-06-05 18:32:24,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270058794] [2021-06-05 18:32:24,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 18:32:24,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:32:24,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 18:32:24,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1267, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:32:24,962 INFO L87 Difference]: Start difference. First operand 6228 states and 17683 transitions. Second operand has 41 states, 41 states have (on average 5.365853658536586) internal successors, (220), 41 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:25,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:32:25,769 INFO L93 Difference]: Finished difference Result 7668 states and 20883 transitions. [2021-06-05 18:32:25,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:32:25,769 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 5.365853658536586) internal successors, (220), 41 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:32:25,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:32:25,777 INFO L225 Difference]: With dead ends: 7668 [2021-06-05 18:32:25,777 INFO L226 Difference]: Without dead ends: 7334 [2021-06-05 18:32:25,778 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 1013.0ms TimeCoverageRelationStatistics Valid=1716, Invalid=4446, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 18:32:25,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7334 states. [2021-06-05 18:32:25,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7334 to 6313. [2021-06-05 18:32:25,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6313 states, 6312 states have (on average 2.828422053231939) internal successors, (17853), 6312 states have internal predecessors, (17853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:25,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6313 states to 6313 states and 17853 transitions. [2021-06-05 18:32:25,857 INFO L78 Accepts]: Start accepts. Automaton has 6313 states and 17853 transitions. Word has length 190 [2021-06-05 18:32:25,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:32:25,857 INFO L482 AbstractCegarLoop]: Abstraction has 6313 states and 17853 transitions. [2021-06-05 18:32:25,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 5.365853658536586) internal successors, (220), 41 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:25,857 INFO L276 IsEmpty]: Start isEmpty. Operand 6313 states and 17853 transitions. [2021-06-05 18:32:25,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:32:25,861 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:32:25,861 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:32:26,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-05 18:32:26,062 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:32:26,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:32:26,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1353516717, now seen corresponding path program 492 times [2021-06-05 18:32:26,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:32:26,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933840374] [2021-06-05 18:32:26,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:32:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:26,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:32:26,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933840374] [2021-06-05 18:32:26,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933840374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:26,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095546804] [2021-06-05 18:32:26,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:26,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-05 18:32:26,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:32:26,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:32:26,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:32:26,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:26,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095546804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:26,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:32:26,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-05 18:32:26,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373617347] [2021-06-05 18:32:26,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:32:26,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:32:26,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:32:26,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1076, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:32:26,808 INFO L87 Difference]: Start difference. First operand 6313 states and 17853 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:27,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:32:27,510 INFO L93 Difference]: Finished difference Result 9061 states and 23477 transitions. [2021-06-05 18:32:27,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:32:27,511 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:32:27,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:32:27,519 INFO L225 Difference]: With dead ends: 9061 [2021-06-05 18:32:27,520 INFO L226 Difference]: Without dead ends: 8791 [2021-06-05 18:32:27,520 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 927.7ms TimeCoverageRelationStatistics Valid=1502, Invalid=3754, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 18:32:27,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8791 states. [2021-06-05 18:32:27,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8791 to 6328. [2021-06-05 18:32:27,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:27,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:32:27,589 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:32:27,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:32:27,589 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:32:27,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:27,589 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:32:27,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:32:27,593 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:32:27,593 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:32:27,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:27,794 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:32:27,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:32:27,794 INFO L82 PathProgramCache]: Analyzing trace with hash 507224989, now seen corresponding path program 493 times [2021-06-05 18:32:27,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:32:27,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242346898] [2021-06-05 18:32:27,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:32:27,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:28,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:28,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:32:28,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242346898] [2021-06-05 18:32:28,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242346898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:28,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559409244] [2021-06-05 18:32:28,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:28,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:28,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:32:28,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:32:28,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:28,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559409244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:28,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:32:28,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-05 18:32:28,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616893426] [2021-06-05 18:32:28,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:32:28,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:32:28,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:32:28,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1164, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:32:28,586 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:29,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:32:29,393 INFO L93 Difference]: Finished difference Result 8946 states and 23247 transitions. [2021-06-05 18:32:29,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:32:29,394 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:32:29,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:32:29,402 INFO L225 Difference]: With dead ends: 8946 [2021-06-05 18:32:29,402 INFO L226 Difference]: Without dead ends: 8676 [2021-06-05 18:32:29,403 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 1031.2ms TimeCoverageRelationStatistics Valid=1595, Invalid=4257, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 18:32:29,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8676 states. [2021-06-05 18:32:29,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8676 to 6328. [2021-06-05 18:32:29,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:29,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:32:29,469 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:32:29,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:32:29,469 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:32:29,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:29,469 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:32:29,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:32:29,473 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:32:29,473 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:32:29,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-06-05 18:32:29,674 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:32:29,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:32:29,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1027331413, now seen corresponding path program 494 times [2021-06-05 18:32:29,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:32:29,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468961450] [2021-06-05 18:32:29,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:32:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:30,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:32:30,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468961450] [2021-06-05 18:32:30,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468961450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:30,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046698515] [2021-06-05 18:32:30,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:30,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:32:30,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:32:30,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:32:30,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:32:30,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:30,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046698515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:30,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:32:30,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-05 18:32:30,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657799025] [2021-06-05 18:32:30,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:32:30,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:32:30,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:32:30,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1105, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:32:30,384 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:31,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:32:31,114 INFO L93 Difference]: Finished difference Result 8921 states and 23197 transitions. [2021-06-05 18:32:31,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:32:31,114 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:32:31,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:32:31,122 INFO L225 Difference]: With dead ends: 8921 [2021-06-05 18:32:31,122 INFO L226 Difference]: Without dead ends: 8651 [2021-06-05 18:32:31,122 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 955.7ms TimeCoverageRelationStatistics Valid=1494, Invalid=4056, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 18:32:31,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8651 states. [2021-06-05 18:32:31,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8651 to 6328. [2021-06-05 18:32:31,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:31,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:32:31,184 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:32:31,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:32:31,184 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:32:31,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:31,184 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:32:31,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:32:31,188 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:32:31,188 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:32:31,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable502,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:31,389 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:32:31,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:32:31,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1704276891, now seen corresponding path program 495 times [2021-06-05 18:32:31,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:32:31,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414479542] [2021-06-05 18:32:31,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:32:31,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:31,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:32:31,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414479542] [2021-06-05 18:32:31,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414479542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:31,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782778699] [2021-06-05 18:32:31,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:31,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-05 18:32:31,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:32:31,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:32:31,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:32:32,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:32,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782778699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:32,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:32:32,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-05 18:32:32,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831179924] [2021-06-05 18:32:32,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:32:32,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:32:32,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:32:32,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1192, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:32:32,149 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:32,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:32:32,985 INFO L93 Difference]: Finished difference Result 8871 states and 23097 transitions. [2021-06-05 18:32:32,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:32:32,985 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:32:32,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:32:32,993 INFO L225 Difference]: With dead ends: 8871 [2021-06-05 18:32:32,994 INFO L226 Difference]: Without dead ends: 8601 [2021-06-05 18:32:32,994 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 1050.4ms TimeCoverageRelationStatistics Valid=1595, Invalid=4567, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 18:32:33,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8601 states. [2021-06-05 18:32:33,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8601 to 6328. [2021-06-05 18:32:33,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:33,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:32:33,089 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:32:33,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:32:33,089 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:32:33,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:33,089 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:32:33,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:32:33,093 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:32:33,093 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:32:33,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 499 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-06-05 18:32:33,294 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:32:33,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:32:33,294 INFO L82 PathProgramCache]: Analyzing trace with hash -897936343, now seen corresponding path program 496 times [2021-06-05 18:32:33,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:32:33,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877728504] [2021-06-05 18:32:33,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:32:33,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:33,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:33,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:32:33,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877728504] [2021-06-05 18:32:33,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877728504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:33,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290278451] [2021-06-05 18:32:33,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:33,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:32:33,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:32:33,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:32:33,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:32:33,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:33,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290278451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:33,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:32:33,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-05 18:32:33,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682715938] [2021-06-05 18:32:33,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:32:33,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:32:33,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:32:33,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1130, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:32:33,998 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:34,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:32:34,782 INFO L93 Difference]: Finished difference Result 8821 states and 22997 transitions. [2021-06-05 18:32:34,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:32:34,782 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:32:34,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:32:34,790 INFO L225 Difference]: With dead ends: 8821 [2021-06-05 18:32:34,791 INFO L226 Difference]: Without dead ends: 8551 [2021-06-05 18:32:34,791 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 975.3ms TimeCoverageRelationStatistics Valid=1502, Invalid=4350, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 18:32:34,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8551 states. [2021-06-05 18:32:34,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8551 to 6328. [2021-06-05 18:32:34,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:34,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:32:34,860 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:32:34,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:32:34,860 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:32:34,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:34,861 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:32:34,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:32:34,865 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:32:34,865 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:32:35,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable504 [2021-06-05 18:32:35,069 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:32:35,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:32:35,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1838872295, now seen corresponding path program 497 times [2021-06-05 18:32:35,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:32:35,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041955364] [2021-06-05 18:32:35,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:32:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:35,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:35,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:32:35,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041955364] [2021-06-05 18:32:35,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041955364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:35,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304583242] [2021-06-05 18:32:35,491 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:35,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-05 18:32:35,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:32:35,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:32:35,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:32:35,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:35,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304583242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:35,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:32:35,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-05 18:32:35,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524551961] [2021-06-05 18:32:35,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:32:35,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:32:35,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:32:35,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1216, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:32:35,837 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:36,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:32:36,747 INFO L93 Difference]: Finished difference Result 8771 states and 22897 transitions. [2021-06-05 18:32:36,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 18:32:36,747 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:32:36,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:32:36,756 INFO L225 Difference]: With dead ends: 8771 [2021-06-05 18:32:36,756 INFO L226 Difference]: Without dead ends: 8501 [2021-06-05 18:32:36,756 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 1103.7ms TimeCoverageRelationStatistics Valid=1611, Invalid=4869, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 18:32:36,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8501 states. [2021-06-05 18:32:36,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8501 to 6328. [2021-06-05 18:32:36,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:36,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:32:36,823 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:32:36,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:32:36,823 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:32:36,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:36,823 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:32:36,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:32:36,828 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:32:36,828 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:32:37,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:37,033 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:32:37,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:32:37,033 INFO L82 PathProgramCache]: Analyzing trace with hash -207543513, now seen corresponding path program 498 times [2021-06-05 18:32:37,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:32:37,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736146009] [2021-06-05 18:32:37,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:32:37,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:37,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:37,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:32:37,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736146009] [2021-06-05 18:32:37,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736146009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:37,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597180807] [2021-06-05 18:32:37,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:37,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-05 18:32:37,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:32:37,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:32:37,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:32:37,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:37,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597180807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:37,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:32:37,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-05 18:32:37,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573726627] [2021-06-05 18:32:37,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:32:37,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:32:37,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:32:37,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:32:37,739 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:38,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:32:38,595 INFO L93 Difference]: Finished difference Result 8721 states and 22797 transitions. [2021-06-05 18:32:38,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:32:38,595 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:32:38,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:32:38,603 INFO L225 Difference]: With dead ends: 8721 [2021-06-05 18:32:38,603 INFO L226 Difference]: Without dead ends: 8451 [2021-06-05 18:32:38,604 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 1018.9ms TimeCoverageRelationStatistics Valid=1526, Invalid=4636, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 18:32:38,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8451 states. [2021-06-05 18:32:38,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8451 to 6328. [2021-06-05 18:32:38,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:38,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:32:38,670 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:32:38,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:32:38,671 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:32:38,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:38,671 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:32:38,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:32:38,675 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:32:38,675 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:32:38,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable506 [2021-06-05 18:32:38,875 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:32:38,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:32:38,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1053031401, now seen corresponding path program 499 times [2021-06-05 18:32:38,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:32:38,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508723963] [2021-06-05 18:32:38,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:32:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:39,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:39,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:32:39,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508723963] [2021-06-05 18:32:39,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508723963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:39,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789864300] [2021-06-05 18:32:39,276 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:39,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:32:39,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:32:39,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:39,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789864300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:39,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:32:39,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-05 18:32:39,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163753173] [2021-06-05 18:32:39,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:32:39,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:32:39,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:32:39,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1236, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:32:39,587 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:40,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:32:40,573 INFO L93 Difference]: Finished difference Result 8671 states and 22697 transitions. [2021-06-05 18:32:40,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 18:32:40,574 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:32:40,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:32:40,582 INFO L225 Difference]: With dead ends: 8671 [2021-06-05 18:32:40,582 INFO L226 Difference]: Without dead ends: 8401 [2021-06-05 18:32:40,582 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 1142.3ms TimeCoverageRelationStatistics Valid=1643, Invalid=5163, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 18:32:40,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8401 states. [2021-06-05 18:32:40,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8401 to 6328. [2021-06-05 18:32:40,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:40,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:32:40,663 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:32:40,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:32:40,664 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:32:40,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:40,664 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:32:40,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:32:40,668 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:32:40,668 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:32:40,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 503 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable507 [2021-06-05 18:32:40,869 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:32:40,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:32:40,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1335932837, now seen corresponding path program 500 times [2021-06-05 18:32:40,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:32:40,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402949725] [2021-06-05 18:32:40,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:32:40,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:41,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:41,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:32:41,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402949725] [2021-06-05 18:32:41,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402949725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:41,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679466003] [2021-06-05 18:32:41,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:41,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:32:41,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:32:41,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:32:41,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:32:41,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:41,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679466003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:41,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:32:41,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-05 18:32:41,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973274347] [2021-06-05 18:32:41,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:32:41,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:32:41,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:32:41,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:32:41,538 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:42,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:32:42,416 INFO L93 Difference]: Finished difference Result 8621 states and 22597 transitions. [2021-06-05 18:32:42,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 18:32:42,417 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:32:42,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:32:42,425 INFO L225 Difference]: With dead ends: 8621 [2021-06-05 18:32:42,425 INFO L226 Difference]: Without dead ends: 8351 [2021-06-05 18:32:42,426 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 1018.9ms TimeCoverageRelationStatistics Valid=1566, Invalid=4914, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 18:32:42,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8351 states. [2021-06-05 18:32:42,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8351 to 6328. [2021-06-05 18:32:42,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:42,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:32:42,496 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:32:42,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:32:42,496 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:32:42,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:42,496 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:32:42,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:32:42,500 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:32:42,500 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:32:42,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:42,701 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:32:42,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:32:42,701 INFO L82 PathProgramCache]: Analyzing trace with hash -2075982699, now seen corresponding path program 501 times [2021-06-05 18:32:42,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:32:42,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598121346] [2021-06-05 18:32:42,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:32:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:43,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:43,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:32:43,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598121346] [2021-06-05 18:32:43,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598121346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:43,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739395576] [2021-06-05 18:32:43,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:43,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-05 18:32:43,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:32:43,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 18:32:43,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:32:43,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:43,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739395576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:43,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:32:43,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-05 18:32:43,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616105785] [2021-06-05 18:32:43,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:32:43,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:32:43,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:32:43,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1252, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:32:43,435 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:44,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:32:44,421 INFO L93 Difference]: Finished difference Result 8571 states and 22497 transitions. [2021-06-05 18:32:44,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 18:32:44,422 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:32:44,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:32:44,430 INFO L225 Difference]: With dead ends: 8571 [2021-06-05 18:32:44,430 INFO L226 Difference]: Without dead ends: 8301 [2021-06-05 18:32:44,431 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 1133.8ms TimeCoverageRelationStatistics Valid=1569, Invalid=5237, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 18:32:44,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8301 states. [2021-06-05 18:32:44,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8301 to 6328. [2021-06-05 18:32:44,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:44,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:32:44,497 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:32:44,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:32:44,497 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:32:44,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:44,498 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:32:44,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:32:44,502 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:32:44,502 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:32:44,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,505 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:44,702 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:32:44,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:32:44,703 INFO L82 PathProgramCache]: Analyzing trace with hash 326775203, now seen corresponding path program 502 times [2021-06-05 18:32:44,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:32:44,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511399925] [2021-06-05 18:32:44,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:32:44,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:45,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:45,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:32:45,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511399925] [2021-06-05 18:32:45,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511399925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:45,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535755306] [2021-06-05 18:32:45,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:45,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:32:45,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:32:45,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:32:45,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:32:45,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:45,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535755306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:45,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:32:45,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-05 18:32:45,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656038163] [2021-06-05 18:32:45,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:32:45,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:32:45,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:32:45,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1181, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:32:45,370 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:46,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:32:46,399 INFO L93 Difference]: Finished difference Result 8521 states and 22397 transitions. [2021-06-05 18:32:46,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 18:32:46,400 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:32:46,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:32:46,408 INFO L225 Difference]: With dead ends: 8521 [2021-06-05 18:32:46,408 INFO L226 Difference]: Without dead ends: 8251 [2021-06-05 18:32:46,408 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1085.5ms TimeCoverageRelationStatistics Valid=1622, Invalid=5184, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 18:32:46,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8251 states. [2021-06-05 18:32:46,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8251 to 6328. [2021-06-05 18:32:46,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:46,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:32:46,475 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:32:46,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:32:46,475 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:32:46,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:46,475 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:32:46,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:32:46,479 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:32:46,479 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:32:46,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-06-05 18:32:46,680 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:32:46,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:32:46,680 INFO L82 PathProgramCache]: Analyzing trace with hash -2126845293, now seen corresponding path program 503 times [2021-06-05 18:32:46,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:32:46,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45815230] [2021-06-05 18:32:46,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:32:46,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:47,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:47,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:32:47,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45815230] [2021-06-05 18:32:47,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45815230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:47,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899264506] [2021-06-05 18:32:47,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:47,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-05 18:32:47,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:32:47,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:32:47,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:32:47,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:47,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899264506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:47,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:32:47,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-05 18:32:47,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124349507] [2021-06-05 18:32:47,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:32:47,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:32:47,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:32:47,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1264, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:32:47,382 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:48,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:32:48,513 INFO L93 Difference]: Finished difference Result 8471 states and 22297 transitions. [2021-06-05 18:32:48,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 18:32:48,513 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:32:48,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:32:48,521 INFO L225 Difference]: With dead ends: 8471 [2021-06-05 18:32:48,521 INFO L226 Difference]: Without dead ends: 8201 [2021-06-05 18:32:48,521 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 1253.9ms TimeCoverageRelationStatistics Valid=1755, Invalid=5727, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 18:32:48,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8201 states. [2021-06-05 18:32:48,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8201 to 6328. [2021-06-05 18:32:48,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:48,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:32:48,584 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:32:48,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:32:48,584 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:32:48,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:48,584 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:32:48,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:32:48,588 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:32:48,588 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:32:48,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2021-06-05 18:32:48,789 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:32:48,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:32:48,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1245286111, now seen corresponding path program 504 times [2021-06-05 18:32:48,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:32:48,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942698737] [2021-06-05 18:32:48,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:32:48,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:49,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:49,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:32:49,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942698737] [2021-06-05 18:32:49,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942698737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:49,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536770260] [2021-06-05 18:32:49,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:49,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-05 18:32:49,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:32:49,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:32:49,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:32:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:49,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536770260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:49,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:32:49,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-05 18:32:49,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060625255] [2021-06-05 18:32:49,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:32:49,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:32:49,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:32:49,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1190, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:32:49,454 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:50,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:32:50,505 INFO L93 Difference]: Finished difference Result 8421 states and 22197 transitions. [2021-06-05 18:32:50,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 18:32:50,505 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:32:50,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:32:50,514 INFO L225 Difference]: With dead ends: 8421 [2021-06-05 18:32:50,514 INFO L226 Difference]: Without dead ends: 8151 [2021-06-05 18:32:50,515 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 1103.7ms TimeCoverageRelationStatistics Valid=1694, Invalid=5446, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 18:32:50,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8151 states. [2021-06-05 18:32:50,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8151 to 6328. [2021-06-05 18:32:50,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:50,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:32:50,583 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:32:50,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:32:50,583 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:32:50,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:50,583 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:32:50,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:32:50,588 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:32:50,588 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:32:50,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable512,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:50,788 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:32:50,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:32:50,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1887660527, now seen corresponding path program 505 times [2021-06-05 18:32:50,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:32:50,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612229408] [2021-06-05 18:32:50,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:32:50,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:51,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:51,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:32:51,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612229408] [2021-06-05 18:32:51,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612229408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:51,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393890370] [2021-06-05 18:32:51,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:51,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:32:51,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:32:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:51,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393890370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:51,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:32:51,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-05 18:32:51,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027862736] [2021-06-05 18:32:51,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:32:51,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:32:51,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:32:51,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:32:51,494 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:52,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:32:52,683 INFO L93 Difference]: Finished difference Result 8371 states and 22097 transitions. [2021-06-05 18:32:52,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 18:32:52,683 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:32:52,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:32:52,691 INFO L225 Difference]: With dead ends: 8371 [2021-06-05 18:32:52,691 INFO L226 Difference]: Without dead ends: 8101 [2021-06-05 18:32:52,692 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 1268.0ms TimeCoverageRelationStatistics Valid=1835, Invalid=5997, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 18:32:52,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8101 states. [2021-06-05 18:32:52,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8101 to 6328. [2021-06-05 18:32:52,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:52,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:32:52,756 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:32:52,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:32:52,756 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:32:52,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:52,756 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:32:52,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:32:52,760 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:32:52,761 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:32:52,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-06-05 18:32:52,961 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:32:52,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:32:52,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1934207457, now seen corresponding path program 506 times [2021-06-05 18:32:52,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:32:52,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172771398] [2021-06-05 18:32:52,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:32:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:53,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:53,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:32:53,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172771398] [2021-06-05 18:32:53,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172771398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:53,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121144098] [2021-06-05 18:32:53,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:53,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:32:53,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:32:53,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:32:53,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:32:53,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:53,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121144098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:53,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:32:53,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-05 18:32:53,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986584009] [2021-06-05 18:32:53,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:32:53,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:32:53,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:32:53,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:32:53,625 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:54,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:32:54,620 INFO L93 Difference]: Finished difference Result 8321 states and 21997 transitions. [2021-06-05 18:32:54,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 18:32:54,620 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:32:54,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:32:54,629 INFO L225 Difference]: With dead ends: 8321 [2021-06-05 18:32:54,629 INFO L226 Difference]: Without dead ends: 8051 [2021-06-05 18:32:54,630 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1734 ImplicationChecksByTransitivity, 1099.8ms TimeCoverageRelationStatistics Valid=1782, Invalid=5700, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 18:32:54,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8051 states. [2021-06-05 18:32:54,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8051 to 6328. [2021-06-05 18:32:54,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:54,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:32:54,696 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:32:54,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:32:54,696 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:32:54,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:54,696 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:32:54,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:32:54,701 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:32:54,701 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:32:54,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-06-05 18:32:54,901 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:32:54,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:32:54,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1442375439, now seen corresponding path program 507 times [2021-06-05 18:32:54,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:32:54,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017012245] [2021-06-05 18:32:54,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:32:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:55,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:32:55,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017012245] [2021-06-05 18:32:55,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017012245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:55,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940148813] [2021-06-05 18:32:55,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:55,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-05 18:32:55,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:32:55,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-05 18:32:55,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:32:55,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:55,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940148813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:55,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:32:55,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-05 18:32:55,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091334232] [2021-06-05 18:32:55,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:32:55,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:32:55,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:32:55,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1276, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:32:55,582 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:56,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:32:56,744 INFO L93 Difference]: Finished difference Result 8271 states and 21897 transitions. [2021-06-05 18:32:56,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 18:32:56,745 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:32:56,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:32:56,753 INFO L225 Difference]: With dead ends: 8271 [2021-06-05 18:32:56,753 INFO L226 Difference]: Without dead ends: 8001 [2021-06-05 18:32:56,754 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 1252.1ms TimeCoverageRelationStatistics Valid=1746, Invalid=6086, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 18:32:56,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8001 states. [2021-06-05 18:32:56,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8001 to 6328. [2021-06-05 18:32:56,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:56,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:32:56,819 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:32:56,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:32:56,820 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:32:56,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:56,820 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:32:56,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:32:56,824 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:32:56,824 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:32:57,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:57,025 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:32:57,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:32:57,025 INFO L82 PathProgramCache]: Analyzing trace with hash -334315363, now seen corresponding path program 508 times [2021-06-05 18:32:57,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:32:57,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817702940] [2021-06-05 18:32:57,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:32:57,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:57,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:57,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:32:57,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817702940] [2021-06-05 18:32:57,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817702940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:57,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898827831] [2021-06-05 18:32:57,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:57,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:32:57,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:32:57,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:32:57,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:32:57,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:57,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898827831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:57,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:32:57,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-05 18:32:57,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233369521] [2021-06-05 18:32:57,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:32:57,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:32:57,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:32:57,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:32:57,668 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:58,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:32:58,772 INFO L93 Difference]: Finished difference Result 8221 states and 21797 transitions. [2021-06-05 18:32:58,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 18:32:58,773 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:32:58,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:32:58,780 INFO L225 Difference]: With dead ends: 8221 [2021-06-05 18:32:58,780 INFO L226 Difference]: Without dead ends: 7951 [2021-06-05 18:32:58,780 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1865 ImplicationChecksByTransitivity, 1162.0ms TimeCoverageRelationStatistics Valid=1886, Invalid=5946, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 18:32:58,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7951 states. [2021-06-05 18:32:58,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7951 to 6328. [2021-06-05 18:32:58,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:58,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:32:58,842 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:32:58,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:32:58,843 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:32:58,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:32:58,843 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:32:58,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:32:58,847 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:32:58,847 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:32:59,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable516 [2021-06-05 18:32:59,047 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:32:59,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:32:59,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1765326221, now seen corresponding path program 509 times [2021-06-05 18:32:59,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:32:59,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877726027] [2021-06-05 18:32:59,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:32:59,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:59,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:59,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:32:59,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877726027] [2021-06-05 18:32:59,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877726027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:59,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7125522] [2021-06-05 18:32:59,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:32:59,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-05 18:32:59,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:32:59,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:32:59,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:32:59,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:59,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7125522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:59,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:32:59,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-05 18:32:59,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731645913] [2021-06-05 18:32:59,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:32:59,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:32:59,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:32:59,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1276, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:32:59,722 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:01,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:33:01,093 INFO L93 Difference]: Finished difference Result 8171 states and 21697 transitions. [2021-06-05 18:33:01,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 18:33:01,093 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:33:01,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:33:01,099 INFO L225 Difference]: With dead ends: 8171 [2021-06-05 18:33:01,099 INFO L226 Difference]: Without dead ends: 7901 [2021-06-05 18:33:01,100 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 1371.2ms TimeCoverageRelationStatistics Valid=2043, Invalid=6513, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 18:33:01,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7901 states. [2021-06-05 18:33:01,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7901 to 6328. [2021-06-05 18:33:01,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:01,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:33:01,160 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:33:01,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:33:01,160 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:33:01,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:01,160 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:33:01,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:33:01,164 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:33:01,164 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:33:01,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:01,365 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:33:01,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:33:01,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1019440997, now seen corresponding path program 510 times [2021-06-05 18:33:01,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:33:01,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740902852] [2021-06-05 18:33:01,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:33:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:33:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:01,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:33:01,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740902852] [2021-06-05 18:33:01,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740902852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:01,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319966746] [2021-06-05 18:33:01,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:01,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-05 18:33:01,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:33:01,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:33:01,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:33:02,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:02,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319966746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:02,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:33:02,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-05 18:33:02,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339132979] [2021-06-05 18:33:02,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:33:02,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:33:02,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:33:02,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:33:02,009 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:03,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:33:03,202 INFO L93 Difference]: Finished difference Result 8121 states and 21597 transitions. [2021-06-05 18:33:03,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 18:33:03,202 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:33:03,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:33:03,210 INFO L225 Difference]: With dead ends: 8121 [2021-06-05 18:33:03,210 INFO L226 Difference]: Without dead ends: 7851 [2021-06-05 18:33:03,211 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2000 ImplicationChecksByTransitivity, 1167.6ms TimeCoverageRelationStatistics Valid=2006, Invalid=6184, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 18:33:03,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7851 states. [2021-06-05 18:33:03,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7851 to 6328. [2021-06-05 18:33:03,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:03,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:33:03,276 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:33:03,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:33:03,276 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:33:03,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:03,276 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:33:03,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:33:03,280 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:33:03,280 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:33:03,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:03,481 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:33:03,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:33:03,481 INFO L82 PathProgramCache]: Analyzing trace with hash -379782773, now seen corresponding path program 511 times [2021-06-05 18:33:03,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:33:03,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454618620] [2021-06-05 18:33:03,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:33:03,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:33:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:03,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:33:03,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454618620] [2021-06-05 18:33:03,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454618620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:03,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092673561] [2021-06-05 18:33:03,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:33:03,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:33:03,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:33:04,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:04,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092673561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:04,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:33:04,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-05 18:33:04,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640359332] [2021-06-05 18:33:04,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:33:04,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:33:04,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:33:04,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:33:04,171 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:05,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:33:05,668 INFO L93 Difference]: Finished difference Result 8071 states and 21497 transitions. [2021-06-05 18:33:05,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 18:33:05,668 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:33:05,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:33:05,676 INFO L225 Difference]: With dead ends: 8071 [2021-06-05 18:33:05,676 INFO L226 Difference]: Without dead ends: 7801 [2021-06-05 18:33:05,677 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2179 ImplicationChecksByTransitivity, 1432.4ms TimeCoverageRelationStatistics Valid=2171, Invalid=6759, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 18:33:05,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7801 states. [2021-06-05 18:33:05,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7801 to 6328. [2021-06-05 18:33:05,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:05,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:33:05,742 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:33:05,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:33:05,742 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:33:05,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:05,742 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:33:05,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:33:05,747 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:33:05,747 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:33:05,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:05,947 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:33:05,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:33:05,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1154701799, now seen corresponding path program 512 times [2021-06-05 18:33:05,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:33:05,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915262799] [2021-06-05 18:33:05,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:33:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:33:06,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:06,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:33:06,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915262799] [2021-06-05 18:33:06,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915262799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:06,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742815805] [2021-06-05 18:33:06,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:06,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:33:06,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:33:06,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:33:06,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:33:06,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:06,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742815805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:06,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:33:06,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-05 18:33:06,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946362714] [2021-06-05 18:33:06,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:33:06,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:33:06,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:33:06,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:33:06,591 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:07,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:33:07,818 INFO L93 Difference]: Finished difference Result 8021 states and 21397 transitions. [2021-06-05 18:33:07,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 18:33:07,818 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:33:07,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:33:07,826 INFO L225 Difference]: With dead ends: 8021 [2021-06-05 18:33:07,826 INFO L226 Difference]: Without dead ends: 7751 [2021-06-05 18:33:07,827 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2139 ImplicationChecksByTransitivity, 1249.7ms TimeCoverageRelationStatistics Valid=2142, Invalid=6414, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 18:33:07,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7751 states. [2021-06-05 18:33:07,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7751 to 6328. [2021-06-05 18:33:07,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:07,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:33:07,892 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:33:07,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:33:07,893 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:33:07,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:07,893 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:33:07,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:33:07,897 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:33:07,897 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:33:08,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 516 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-06-05 18:33:08,097 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:33:08,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:33:08,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1608615159, now seen corresponding path program 513 times [2021-06-05 18:33:08,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:33:08,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117990880] [2021-06-05 18:33:08,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:33:08,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:33:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:08,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:33:08,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117990880] [2021-06-05 18:33:08,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117990880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:08,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493010657] [2021-06-05 18:33:08,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:08,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-05 18:33:08,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:33:08,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 18:33:08,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:33:08,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:08,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493010657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:08,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:33:08,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-05 18:33:08,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674223405] [2021-06-05 18:33:08,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:33:08,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:33:08,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:33:08,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1264, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:33:08,791 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:10,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:33:10,126 INFO L93 Difference]: Finished difference Result 7971 states and 21297 transitions. [2021-06-05 18:33:10,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 18:33:10,127 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:33:10,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:33:10,134 INFO L225 Difference]: With dead ends: 7971 [2021-06-05 18:33:10,134 INFO L226 Difference]: Without dead ends: 7701 [2021-06-05 18:33:10,135 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2150 ImplicationChecksByTransitivity, 1381.1ms TimeCoverageRelationStatistics Valid=2040, Invalid=6890, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 18:33:10,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7701 states. [2021-06-05 18:33:10,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7701 to 6328. [2021-06-05 18:33:10,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:10,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:33:10,199 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:33:10,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:33:10,200 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:33:10,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:10,200 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:33:10,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:33:10,204 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:33:10,204 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:33:10,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-06-05 18:33:10,405 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:33:10,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:33:10,405 INFO L82 PathProgramCache]: Analyzing trace with hash -730603241, now seen corresponding path program 514 times [2021-06-05 18:33:10,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:33:10,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157480310] [2021-06-05 18:33:10,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:33:10,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:33:10,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:10,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:33:10,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157480310] [2021-06-05 18:33:10,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157480310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:10,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45719577] [2021-06-05 18:33:10,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:10,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:33:10,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:33:10,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:33:10,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:33:11,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:11,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45719577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:11,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:33:11,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-05 18:33:11,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622821188] [2021-06-05 18:33:11,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:33:11,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:33:11,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:33:11,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1175, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:33:11,023 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:12,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:33:12,227 INFO L93 Difference]: Finished difference Result 7921 states and 21197 transitions. [2021-06-05 18:33:12,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 18:33:12,228 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:33:12,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:33:12,235 INFO L225 Difference]: With dead ends: 7921 [2021-06-05 18:33:12,235 INFO L226 Difference]: Without dead ends: 7651 [2021-06-05 18:33:12,236 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2282 ImplicationChecksByTransitivity, 1253.1ms TimeCoverageRelationStatistics Valid=2294, Invalid=6636, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 18:33:12,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7651 states. [2021-06-05 18:33:12,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7651 to 6328. [2021-06-05 18:33:12,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:12,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:33:12,298 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:33:12,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:33:12,298 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:33:12,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:12,298 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:33:12,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:33:12,302 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:33:12,302 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:33:12,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:12,502 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:33:12,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:33:12,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1630658041, now seen corresponding path program 515 times [2021-06-05 18:33:12,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:33:12,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111657908] [2021-06-05 18:33:12,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:33:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:33:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:12,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:33:12,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111657908] [2021-06-05 18:33:12,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111657908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:12,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814938489] [2021-06-05 18:33:12,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:12,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-05 18:33:12,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:33:12,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:33:12,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:33:13,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:13,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814938489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:13,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:33:13,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-05 18:33:13,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706627045] [2021-06-05 18:33:13,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:33:13,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:33:13,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:33:13,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1252, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:33:13,150 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:14,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:33:14,669 INFO L93 Difference]: Finished difference Result 7871 states and 21097 transitions. [2021-06-05 18:33:14,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 18:33:14,669 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:33:14,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:33:14,676 INFO L225 Difference]: With dead ends: 7871 [2021-06-05 18:33:14,676 INFO L226 Difference]: Without dead ends: 7601 [2021-06-05 18:33:14,676 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2475 ImplicationChecksByTransitivity, 1533.6ms TimeCoverageRelationStatistics Valid=2475, Invalid=7227, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 18:33:14,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7601 states. [2021-06-05 18:33:14,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7601 to 6328. [2021-06-05 18:33:14,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:14,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:33:14,736 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:33:14,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:33:14,736 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:33:14,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:14,736 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:33:14,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:33:14,740 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:33:14,740 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:33:14,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable523 [2021-06-05 18:33:14,940 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:33:14,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:33:14,941 INFO L82 PathProgramCache]: Analyzing trace with hash -2059722347, now seen corresponding path program 516 times [2021-06-05 18:33:14,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:33:14,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847107961] [2021-06-05 18:33:14,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:33:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:33:15,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:15,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:33:15,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847107961] [2021-06-05 18:33:15,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847107961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:15,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932531732] [2021-06-05 18:33:15,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:15,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-05 18:33:15,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:33:15,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 18:33:15,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:33:15,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:15,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932531732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:15,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:33:15,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-05 18:33:15,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168425042] [2021-06-05 18:33:15,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:33:15,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:33:15,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:33:15,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1160, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:33:15,577 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:16,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:33:16,855 INFO L93 Difference]: Finished difference Result 7821 states and 20997 transitions. [2021-06-05 18:33:16,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 18:33:16,855 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:33:16,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:33:16,861 INFO L225 Difference]: With dead ends: 7821 [2021-06-05 18:33:16,861 INFO L226 Difference]: Without dead ends: 7551 [2021-06-05 18:33:16,862 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2429 ImplicationChecksByTransitivity, 1325.0ms TimeCoverageRelationStatistics Valid=2462, Invalid=6850, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 18:33:16,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7551 states. [2021-06-05 18:33:16,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7551 to 6328. [2021-06-05 18:33:16,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:16,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:33:16,921 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:33:16,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:33:16,921 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:33:16,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:16,921 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:33:16,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:33:16,925 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:33:16,925 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:33:17,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable524,520 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:17,126 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:33:17,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:33:17,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1549061765, now seen corresponding path program 517 times [2021-06-05 18:33:17,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:33:17,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758516382] [2021-06-05 18:33:17,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:33:17,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:33:17,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:17,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:33:17,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758516382] [2021-06-05 18:33:17,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758516382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:17,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336294486] [2021-06-05 18:33:17,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:17,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:33:17,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:33:17,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:33:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:17,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336294486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:17,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:33:17,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-05 18:33:17,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378302697] [2021-06-05 18:33:17,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:33:17,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:33:17,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:33:17,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1236, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:33:17,767 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:19,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:33:19,347 INFO L93 Difference]: Finished difference Result 7771 states and 20897 transitions. [2021-06-05 18:33:19,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 18:33:19,347 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:33:19,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:33:19,354 INFO L225 Difference]: With dead ends: 7771 [2021-06-05 18:33:19,354 INFO L226 Difference]: Without dead ends: 7501 [2021-06-05 18:33:19,354 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 1569.9ms TimeCoverageRelationStatistics Valid=2651, Invalid=7449, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 18:33:19,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7501 states. [2021-06-05 18:33:19,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7501 to 6328. [2021-06-05 18:33:19,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:19,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:33:19,415 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:33:19,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:33:19,415 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:33:19,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:19,415 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:33:19,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:33:19,419 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:33:19,419 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:33:19,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2021-06-05 18:33:19,620 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:33:19,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:33:19,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1464027027, now seen corresponding path program 518 times [2021-06-05 18:33:19,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:33:19,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568374869] [2021-06-05 18:33:19,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:33:19,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:33:19,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:19,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:33:19,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568374869] [2021-06-05 18:33:19,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568374869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:19,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110419819] [2021-06-05 18:33:19,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:20,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:33:20,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:33:20,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:33:20,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:33:20,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:20,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110419819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:20,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:33:20,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-05 18:33:20,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235678529] [2021-06-05 18:33:20,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:33:20,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:33:20,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:33:20,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1141, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:33:20,236 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:21,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:33:21,607 INFO L93 Difference]: Finished difference Result 7721 states and 20797 transitions. [2021-06-05 18:33:21,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 18:33:21,607 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:33:21,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:33:21,615 INFO L225 Difference]: With dead ends: 7721 [2021-06-05 18:33:21,615 INFO L226 Difference]: Without dead ends: 7451 [2021-06-05 18:33:21,616 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2580 ImplicationChecksByTransitivity, 1381.7ms TimeCoverageRelationStatistics Valid=2646, Invalid=7056, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 18:33:21,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7451 states. [2021-06-05 18:33:21,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7451 to 6328. [2021-06-05 18:33:21,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:21,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:33:21,701 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:33:21,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:33:21,701 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:33:21,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:21,702 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:33:21,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:33:21,706 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:33:21,706 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:33:21,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:21,906 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:33:21,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:33:21,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1395875971, now seen corresponding path program 519 times [2021-06-05 18:33:21,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:33:21,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637680763] [2021-06-05 18:33:21,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:33:21,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:33:22,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:22,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:33:22,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637680763] [2021-06-05 18:33:22,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637680763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:22,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89360172] [2021-06-05 18:33:22,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:22,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-05 18:33:22,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:33:22,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 18:33:22,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:33:22,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:22,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89360172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:22,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:33:22,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-05 18:33:22,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431010953] [2021-06-05 18:33:22,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:33:22,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:33:22,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:33:22,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1216, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:33:22,578 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:24,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:33:24,057 INFO L93 Difference]: Finished difference Result 7671 states and 20697 transitions. [2021-06-05 18:33:24,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 18:33:24,058 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:33:24,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:33:24,065 INFO L225 Difference]: With dead ends: 7671 [2021-06-05 18:33:24,065 INFO L226 Difference]: Without dead ends: 7401 [2021-06-05 18:33:24,066 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2570 ImplicationChecksByTransitivity, 1476.6ms TimeCoverageRelationStatistics Valid=2451, Invalid=7649, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 18:33:24,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7401 states. [2021-06-05 18:33:24,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7401 to 6328. [2021-06-05 18:33:24,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:24,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:33:24,128 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:33:24,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:33:24,128 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:33:24,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:24,129 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:33:24,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:33:24,133 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:33:24,133 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:33:24,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527,523 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:24,334 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:33:24,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:33:24,334 INFO L82 PathProgramCache]: Analyzing trace with hash 98906897, now seen corresponding path program 520 times [2021-06-05 18:33:24,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:33:24,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410279644] [2021-06-05 18:33:24,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:33:24,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:33:24,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:24,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:33:24,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410279644] [2021-06-05 18:33:24,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410279644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:24,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650509985] [2021-06-05 18:33:24,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:24,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:33:24,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:33:24,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:33:24,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:33:24,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:24,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650509985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:24,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:33:24,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-05 18:33:24,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583968447] [2021-06-05 18:33:24,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:33:24,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:33:24,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:33:24,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1118, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:33:24,999 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:26,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:33:26,350 INFO L93 Difference]: Finished difference Result 7621 states and 20597 transitions. [2021-06-05 18:33:26,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 18:33:26,351 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:33:26,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:33:26,358 INFO L225 Difference]: With dead ends: 7621 [2021-06-05 18:33:26,358 INFO L226 Difference]: Without dead ends: 7351 [2021-06-05 18:33:26,359 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2735 ImplicationChecksByTransitivity, 1366.4ms TimeCoverageRelationStatistics Valid=2846, Invalid=7254, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 18:33:26,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7351 states. [2021-06-05 18:33:26,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7351 to 6328. [2021-06-05 18:33:26,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:26,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:33:26,423 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:33:26,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:33:26,423 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:33:26,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:26,423 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:33:26,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:33:26,428 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:33:26,428 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:33:26,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable528,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:26,629 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:33:26,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:33:26,629 INFO L82 PathProgramCache]: Analyzing trace with hash 528660481, now seen corresponding path program 521 times [2021-06-05 18:33:26,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:33:26,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476142259] [2021-06-05 18:33:26,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:33:26,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:33:27,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:27,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:33:27,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476142259] [2021-06-05 18:33:27,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476142259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:27,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407939678] [2021-06-05 18:33:27,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:27,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-05 18:33:27,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:33:27,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:33:27,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:33:27,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:27,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407939678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:27,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:33:27,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-05 18:33:27,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902569808] [2021-06-05 18:33:27,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:33:27,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:33:27,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:33:27,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1192, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:33:27,303 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:29,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:33:29,057 INFO L93 Difference]: Finished difference Result 8079 states and 21863 transitions. [2021-06-05 18:33:29,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 18:33:29,057 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:33:29,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:33:29,065 INFO L225 Difference]: With dead ends: 8079 [2021-06-05 18:33:29,065 INFO L226 Difference]: Without dead ends: 7456 [2021-06-05 18:33:29,066 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 1746.0ms TimeCoverageRelationStatistics Valid=3074, Invalid=8268, Unknown=0, NotChecked=0, Total=11342 [2021-06-05 18:33:29,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7456 states. [2021-06-05 18:33:29,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7456 to 6238. [2021-06-05 18:33:29,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6238 states, 6237 states have (on average 2.829565496232163) internal successors, (17648), 6237 states have internal predecessors, (17648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:29,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6238 states to 6238 states and 17648 transitions. [2021-06-05 18:33:29,137 INFO L78 Accepts]: Start accepts. Automaton has 6238 states and 17648 transitions. Word has length 190 [2021-06-05 18:33:29,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:33:29,137 INFO L482 AbstractCegarLoop]: Abstraction has 6238 states and 17648 transitions. [2021-06-05 18:33:29,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:29,137 INFO L276 IsEmpty]: Start isEmpty. Operand 6238 states and 17648 transitions. [2021-06-05 18:33:29,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:33:29,142 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:33:29,142 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:33:29,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,525 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:29,342 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:33:29,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:33:29,342 INFO L82 PathProgramCache]: Analyzing trace with hash 470926351, now seen corresponding path program 522 times [2021-06-05 18:33:29,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:33:29,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888659194] [2021-06-05 18:33:29,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:33:29,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:33:29,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:29,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:33:29,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888659194] [2021-06-05 18:33:29,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888659194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:29,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435646179] [2021-06-05 18:33:29,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:29,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-05 18:33:29,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:33:29,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 18:33:29,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:33:30,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:30,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435646179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:30,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:33:30,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-05 18:33:30,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337335076] [2021-06-05 18:33:30,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:33:30,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:33:30,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:33:30,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1091, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:33:30,009 INFO L87 Difference]: Start difference. First operand 6238 states and 17648 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:31,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:33:31,382 INFO L93 Difference]: Finished difference Result 8308 states and 22581 transitions. [2021-06-05 18:33:31,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 18:33:31,382 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:33:31,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:33:31,390 INFO L225 Difference]: With dead ends: 8308 [2021-06-05 18:33:31,390 INFO L226 Difference]: Without dead ends: 8038 [2021-06-05 18:33:31,391 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2893 ImplicationChecksByTransitivity, 1417.5ms TimeCoverageRelationStatistics Valid=3063, Invalid=7443, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 18:33:31,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8038 states. [2021-06-05 18:33:31,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8038 to 6418. [2021-06-05 18:33:31,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6418 states, 6417 states have (on average 2.837307152875175) internal successors, (18207), 6417 states have internal predecessors, (18207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:31,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6418 states to 6418 states and 18207 transitions. [2021-06-05 18:33:31,459 INFO L78 Accepts]: Start accepts. Automaton has 6418 states and 18207 transitions. Word has length 190 [2021-06-05 18:33:31,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:33:31,459 INFO L482 AbstractCegarLoop]: Abstraction has 6418 states and 18207 transitions. [2021-06-05 18:33:31,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:31,460 INFO L276 IsEmpty]: Start isEmpty. Operand 6418 states and 18207 transitions. [2021-06-05 18:33:31,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:33:31,464 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:33:31,464 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:33:31,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2021-06-05 18:33:31,664 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:33:31,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:33:31,665 INFO L82 PathProgramCache]: Analyzing trace with hash 493269601, now seen corresponding path program 523 times [2021-06-05 18:33:31,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:33:31,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742066486] [2021-06-05 18:33:31,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:33:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:33:32,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:32,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:33:32,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742066486] [2021-06-05 18:33:32,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742066486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:32,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885124546] [2021-06-05 18:33:32,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:32,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:33:32,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:33:32,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:33:32,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:32,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885124546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:32,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:33:32,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-05 18:33:32,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278345696] [2021-06-05 18:33:32,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:33:32,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:33:32,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:33:32,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1164, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:33:32,388 INFO L87 Difference]: Start difference. First operand 6418 states and 18207 transitions. Second operand has 39 states, 39 states have (on average 4.948717948717949) internal successors, (193), 39 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:34,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:33:34,187 INFO L93 Difference]: Finished difference Result 8251 states and 22441 transitions. [2021-06-05 18:33:34,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 18:33:34,188 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.948717948717949) internal successors, (193), 39 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:33:34,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:33:34,196 INFO L225 Difference]: With dead ends: 8251 [2021-06-05 18:33:34,196 INFO L226 Difference]: Without dead ends: 7676 [2021-06-05 18:33:34,197 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3326 ImplicationChecksByTransitivity, 1764.8ms TimeCoverageRelationStatistics Valid=3333, Invalid=8657, Unknown=0, NotChecked=0, Total=11990 [2021-06-05 18:33:34,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7676 states. [2021-06-05 18:33:34,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7676 to 6453. [2021-06-05 18:33:34,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:34,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-05 18:33:34,261 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 190 [2021-06-05 18:33:34,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:33:34,261 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-05 18:33:34,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.948717948717949) internal successors, (193), 39 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:34,261 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-05 18:33:34,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-05 18:33:34,265 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:33:34,265 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:33:34,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 527 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-06-05 18:33:34,466 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:33:34,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:33:34,466 INFO L82 PathProgramCache]: Analyzing trace with hash 131178430, now seen corresponding path program 524 times [2021-06-05 18:33:34,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:33:34,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525650407] [2021-06-05 18:33:34,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:33:34,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:33:34,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:34,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:33:34,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525650407] [2021-06-05 18:33:34,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525650407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:34,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283524711] [2021-06-05 18:33:34,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:34,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:33:34,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:33:34,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 18:33:34,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:33:35,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:35,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283524711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:35,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:33:35,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-05 18:33:35,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229255073] [2021-06-05 18:33:35,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:33:35,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:33:35,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:33:35,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1091, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:33:35,215 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:36,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:33:36,012 INFO L93 Difference]: Finished difference Result 8396 states and 22297 transitions. [2021-06-05 18:33:36,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:33:36,013 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-05 18:33:36,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:33:36,021 INFO L225 Difference]: With dead ends: 8396 [2021-06-05 18:33:36,021 INFO L226 Difference]: Without dead ends: 8126 [2021-06-05 18:33:36,022 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 1007.5ms TimeCoverageRelationStatistics Valid=1551, Invalid=4149, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 18:33:36,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8126 states. [2021-06-05 18:33:36,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8126 to 6453. [2021-06-05 18:33:36,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:36,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-05 18:33:36,089 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-05 18:33:36,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:33:36,089 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-05 18:33:36,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:36,089 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-05 18:33:36,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-05 18:33:36,094 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:33:36,094 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:33:36,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-06-05 18:33:36,294 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:33:36,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:33:36,294 INFO L82 PathProgramCache]: Analyzing trace with hash -715113298, now seen corresponding path program 525 times [2021-06-05 18:33:36,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:33:36,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705779187] [2021-06-05 18:33:36,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:33:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:33:36,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:36,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:33:36,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705779187] [2021-06-05 18:33:36,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705779187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:36,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704664868] [2021-06-05 18:33:36,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:36,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-05 18:33:36,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:33:36,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 18:33:36,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:33:37,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:37,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704664868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:37,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:33:37,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-05 18:33:37,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923199806] [2021-06-05 18:33:37,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:33:37,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:33:37,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:33:37,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=1179, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:33:37,075 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:37,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:33:37,933 INFO L93 Difference]: Finished difference Result 9141 states and 23787 transitions. [2021-06-05 18:33:37,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:33:37,934 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-05 18:33:37,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:33:37,943 INFO L225 Difference]: With dead ends: 9141 [2021-06-05 18:33:37,943 INFO L226 Difference]: Without dead ends: 8871 [2021-06-05 18:33:37,943 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 1080.8ms TimeCoverageRelationStatistics Valid=1625, Invalid=4537, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 18:33:37,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8871 states. [2021-06-05 18:33:38,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8871 to 6453. [2021-06-05 18:33:38,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:38,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-05 18:33:38,016 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-05 18:33:38,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:33:38,017 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-05 18:33:38,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:38,017 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-05 18:33:38,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-05 18:33:38,021 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:33:38,021 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:33:38,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable533,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:38,222 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:33:38,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:33:38,222 INFO L82 PathProgramCache]: Analyzing trace with hash 2045297596, now seen corresponding path program 526 times [2021-06-05 18:33:38,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:33:38,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119441975] [2021-06-05 18:33:38,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:33:38,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:33:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:38,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:33:38,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119441975] [2021-06-05 18:33:38,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119441975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:38,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345112242] [2021-06-05 18:33:38,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:38,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:33:38,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:33:38,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 18:33:38,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:33:38,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:38,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345112242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:38,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:33:38,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-05 18:33:38,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913526546] [2021-06-05 18:33:38,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:33:38,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:33:38,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:33:38,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1118, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:33:38,931 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:39,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:33:39,755 INFO L93 Difference]: Finished difference Result 9096 states and 23697 transitions. [2021-06-05 18:33:39,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:33:39,755 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-05 18:33:39,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:33:39,789 INFO L225 Difference]: With dead ends: 9096 [2021-06-05 18:33:39,789 INFO L226 Difference]: Without dead ends: 8826 [2021-06-05 18:33:39,790 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 1002.9ms TimeCoverageRelationStatistics Valid=1611, Invalid=4551, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 18:33:39,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8826 states. [2021-06-05 18:33:39,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8826 to 6453. [2021-06-05 18:33:39,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:39,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-05 18:33:39,858 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-05 18:33:39,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:33:39,858 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-05 18:33:39,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:39,858 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-05 18:33:39,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-05 18:33:39,862 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:33:39,863 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:33:40,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:40,063 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:33:40,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:33:40,063 INFO L82 PathProgramCache]: Analyzing trace with hash 481938604, now seen corresponding path program 527 times [2021-06-05 18:33:40,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:33:40,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998426415] [2021-06-05 18:33:40,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:33:40,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:33:40,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:40,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:33:40,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998426415] [2021-06-05 18:33:40,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998426415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:40,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554686379] [2021-06-05 18:33:40,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:40,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-05 18:33:40,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:33:40,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 18:33:40,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:33:40,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:40,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554686379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:40,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:33:40,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-05 18:33:40,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5605136] [2021-06-05 18:33:40,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:33:40,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:33:40,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:33:40,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1205, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:33:40,821 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:41,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:33:41,735 INFO L93 Difference]: Finished difference Result 9046 states and 23597 transitions. [2021-06-05 18:33:41,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 18:33:41,736 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-05 18:33:41,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:33:41,745 INFO L225 Difference]: With dead ends: 9046 [2021-06-05 18:33:41,745 INFO L226 Difference]: Without dead ends: 8776 [2021-06-05 18:33:41,746 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 1104.2ms TimeCoverageRelationStatistics Valid=1633, Invalid=4847, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 18:33:41,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8776 states. [2021-06-05 18:33:41,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8776 to 6453. [2021-06-05 18:33:41,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:41,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-05 18:33:41,817 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-05 18:33:41,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:33:41,817 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-05 18:33:41,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:41,817 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-05 18:33:41,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-05 18:33:41,822 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:33:41,822 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:33:42,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-06-05 18:33:42,023 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:33:42,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:33:42,023 INFO L82 PathProgramCache]: Analyzing trace with hash -2120274630, now seen corresponding path program 528 times [2021-06-05 18:33:42,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:33:42,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864575336] [2021-06-05 18:33:42,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:33:42,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:33:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:42,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:33:42,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864575336] [2021-06-05 18:33:42,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864575336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:42,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373853267] [2021-06-05 18:33:42,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:42,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-05 18:33:42,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:33:42,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 18:33:42,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:33:42,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:42,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373853267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:42,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:33:42,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-05 18:33:42,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453348134] [2021-06-05 18:33:42,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:33:42,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:33:42,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:33:42,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1141, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:33:42,774 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:43,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:33:43,652 INFO L93 Difference]: Finished difference Result 8996 states and 23497 transitions. [2021-06-05 18:33:43,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 18:33:43,652 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-05 18:33:43,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:33:43,661 INFO L225 Difference]: With dead ends: 8996 [2021-06-05 18:33:43,661 INFO L226 Difference]: Without dead ends: 8726 [2021-06-05 18:33:43,662 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1393 ImplicationChecksByTransitivity, 1066.5ms TimeCoverageRelationStatistics Valid=1633, Invalid=4847, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 18:33:43,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8726 states. [2021-06-05 18:33:43,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8726 to 6453. [2021-06-05 18:33:43,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:43,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-05 18:33:43,731 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-05 18:33:43,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:33:43,731 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-05 18:33:43,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:43,731 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-05 18:33:43,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-05 18:33:43,735 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:33:43,735 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:33:43,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 532 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-06-05 18:33:43,936 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:33:43,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:33:43,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1233756714, now seen corresponding path program 529 times [2021-06-05 18:33:43,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:33:43,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592298028] [2021-06-05 18:33:43,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:33:43,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:33:44,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:44,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:33:44,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592298028] [2021-06-05 18:33:44,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592298028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:44,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637137540] [2021-06-05 18:33:44,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:33:44,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 18:33:44,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:33:44,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:44,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637137540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:44,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:33:44,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-05 18:33:44,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673272190] [2021-06-05 18:33:44,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:33:44,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:33:44,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:33:44,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:33:44,678 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:45,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:33:45,631 INFO L93 Difference]: Finished difference Result 8946 states and 23397 transitions. [2021-06-05 18:33:45,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 18:33:45,631 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-05 18:33:45,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:33:45,640 INFO L225 Difference]: With dead ends: 8946 [2021-06-05 18:33:45,640 INFO L226 Difference]: Without dead ends: 8676 [2021-06-05 18:33:45,641 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1147.2ms TimeCoverageRelationStatistics Valid=1657, Invalid=5149, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 18:33:45,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8676 states. [2021-06-05 18:33:45,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8676 to 6453. [2021-06-05 18:33:45,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:45,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-05 18:33:45,710 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-05 18:33:45,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:33:45,710 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-05 18:33:45,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:45,710 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-05 18:33:45,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-05 18:33:45,714 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:33:45,714 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:33:45,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable537,533 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:45,916 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:33:45,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:33:45,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1429881800, now seen corresponding path program 530 times [2021-06-05 18:33:45,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:33:45,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786164635] [2021-06-05 18:33:45,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:33:45,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:33:46,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:46,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:33:46,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786164635] [2021-06-05 18:33:46,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786164635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:46,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188845386] [2021-06-05 18:33:46,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:46,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:33:46,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:33:46,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 18:33:46,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:33:46,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:46,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188845386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:46,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:33:46,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-05 18:33:46,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363324960] [2021-06-05 18:33:46,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:33:46,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:33:46,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:33:46,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1160, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:33:46,598 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:47,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:33:47,547 INFO L93 Difference]: Finished difference Result 8896 states and 23297 transitions. [2021-06-05 18:33:47,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 18:33:47,547 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-05 18:33:47,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:33:47,555 INFO L225 Difference]: With dead ends: 8896 [2021-06-05 18:33:47,555 INFO L226 Difference]: Without dead ends: 8626 [2021-06-05 18:33:47,555 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 1060.8ms TimeCoverageRelationStatistics Valid=1671, Invalid=5135, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 18:33:47,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8626 states. [2021-06-05 18:33:47,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8626 to 6453. [2021-06-05 18:33:47,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:47,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-05 18:33:47,622 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-05 18:33:47,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:33:47,622 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-05 18:33:47,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:47,622 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-05 18:33:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-05 18:33:47,626 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:33:47,626 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:33:47,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:47,827 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:33:47,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:33:47,827 INFO L82 PathProgramCache]: Analyzing trace with hash 2019597608, now seen corresponding path program 531 times [2021-06-05 18:33:47,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:33:47,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641385626] [2021-06-05 18:33:47,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:33:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:33:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:48,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:33:48,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641385626] [2021-06-05 18:33:48,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641385626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:48,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981143134] [2021-06-05 18:33:48,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:48,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-05 18:33:48,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:33:48,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 64 conjunts are in the unsatisfiable core [2021-06-05 18:33:48,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:33:48,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:48,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981143134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:48,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:33:48,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-05 18:33:48,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175242738] [2021-06-05 18:33:48,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:33:48,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:33:48,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:33:48,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:33:48,576 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:49,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:33:49,630 INFO L93 Difference]: Finished difference Result 8846 states and 23197 transitions. [2021-06-05 18:33:49,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 18:33:49,631 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-05 18:33:49,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:33:49,639 INFO L225 Difference]: With dead ends: 8846 [2021-06-05 18:33:49,639 INFO L226 Difference]: Without dead ends: 8576 [2021-06-05 18:33:49,640 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1535 ImplicationChecksByTransitivity, 1167.1ms TimeCoverageRelationStatistics Valid=1676, Invalid=5464, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 18:33:49,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8576 states. [2021-06-05 18:33:49,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8576 to 6453. [2021-06-05 18:33:49,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:49,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-05 18:33:49,706 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-05 18:33:49,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:33:49,706 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-05 18:33:49,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:49,707 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-05 18:33:49,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-05 18:33:49,711 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:33:49,711 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:33:49,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable539 [2021-06-05 18:33:49,911 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:33:49,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:33:49,912 INFO L82 PathProgramCache]: Analyzing trace with hash 113594550, now seen corresponding path program 532 times [2021-06-05 18:33:49,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:33:49,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927500166] [2021-06-05 18:33:49,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:33:49,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:33:50,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:50,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:33:50,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927500166] [2021-06-05 18:33:50,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927500166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:50,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069180108] [2021-06-05 18:33:50,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:50,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:33:50,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:33:50,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 18:33:50,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:33:50,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:50,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069180108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:50,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:33:50,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-05 18:33:50,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47421183] [2021-06-05 18:33:50,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:33:50,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:33:50,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:33:50,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1175, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:33:50,617 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:51,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:33:51,604 INFO L93 Difference]: Finished difference Result 8796 states and 23097 transitions. [2021-06-05 18:33:51,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 18:33:51,604 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-05 18:33:51,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:33:51,613 INFO L225 Difference]: With dead ends: 8796 [2021-06-05 18:33:51,613 INFO L226 Difference]: Without dead ends: 8526 [2021-06-05 18:33:51,614 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1647 ImplicationChecksByTransitivity, 1061.6ms TimeCoverageRelationStatistics Valid=1725, Invalid=5415, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 18:33:51,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8526 states. [2021-06-05 18:33:51,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8526 to 6453. [2021-06-05 18:33:51,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:51,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-05 18:33:51,679 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-05 18:33:51,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:33:51,679 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-05 18:33:51,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:51,680 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-05 18:33:51,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-05 18:33:51,684 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:33:51,684 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:33:51,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable540 [2021-06-05 18:33:51,884 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:33:51,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:33:51,885 INFO L82 PathProgramCache]: Analyzing trace with hash 996646310, now seen corresponding path program 533 times [2021-06-05 18:33:51,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:33:51,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445841113] [2021-06-05 18:33:51,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:33:51,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:33:52,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:52,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:33:52,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445841113] [2021-06-05 18:33:52,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445841113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:52,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118119756] [2021-06-05 18:33:52,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:52,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-05 18:33:52,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:33:52,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 18:33:52,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:33:52,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:52,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118119756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:52,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:33:52,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-05 18:33:52,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53630141] [2021-06-05 18:33:52,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:33:52,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:33:52,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:33:52,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:33:52,610 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:53,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:33:53,712 INFO L93 Difference]: Finished difference Result 8746 states and 22997 transitions. [2021-06-05 18:33:53,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 18:33:53,712 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-05 18:33:53,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:33:53,721 INFO L225 Difference]: With dead ends: 8746 [2021-06-05 18:33:53,721 INFO L226 Difference]: Without dead ends: 8476 [2021-06-05 18:33:53,721 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 1182.7ms TimeCoverageRelationStatistics Valid=1753, Invalid=5729, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 18:33:53,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8476 states. [2021-06-05 18:33:53,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8476 to 6453. [2021-06-05 18:33:53,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:53,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-05 18:33:53,793 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-05 18:33:53,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:33:53,793 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-05 18:33:53,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:53,793 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-05 18:33:53,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-05 18:33:53,797 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:33:53,797 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:33:53,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 537 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-06-05 18:33:53,998 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:33:53,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:33:53,998 INFO L82 PathProgramCache]: Analyzing trace with hash -895563084, now seen corresponding path program 534 times [2021-06-05 18:33:53,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:33:53,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439987513] [2021-06-05 18:33:53,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:33:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:33:54,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:54,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:33:54,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439987513] [2021-06-05 18:33:54,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439987513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:54,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038046865] [2021-06-05 18:33:54,377 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:54,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-05 18:33:54,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:33:54,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 18:33:54,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:33:54,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:54,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038046865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:54,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:33:54,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-05 18:33:54,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213571290] [2021-06-05 18:33:54,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:33:54,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:33:54,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:33:54,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:33:54,666 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:55,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:33:55,702 INFO L93 Difference]: Finished difference Result 8696 states and 22897 transitions. [2021-06-05 18:33:55,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 18:33:55,702 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-05 18:33:55,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:33:55,711 INFO L225 Difference]: With dead ends: 8696 [2021-06-05 18:33:55,711 INFO L226 Difference]: Without dead ends: 8426 [2021-06-05 18:33:55,712 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1780 ImplicationChecksByTransitivity, 1093.4ms TimeCoverageRelationStatistics Valid=1795, Invalid=5687, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 18:33:55,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8426 states. [2021-06-05 18:33:55,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8426 to 6453. [2021-06-05 18:33:55,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:55,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-05 18:33:55,781 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-05 18:33:55,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:33:55,781 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-05 18:33:55,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:55,782 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-05 18:33:55,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-05 18:33:55,786 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:33:55,786 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:33:55,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-06-05 18:33:55,986 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:33:55,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:33:55,987 INFO L82 PathProgramCache]: Analyzing trace with hash 945783716, now seen corresponding path program 535 times [2021-06-05 18:33:55,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:33:55,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907895166] [2021-06-05 18:33:55,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:33:55,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:33:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:56,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:33:56,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907895166] [2021-06-05 18:33:56,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907895166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:56,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360782780] [2021-06-05 18:33:56,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:33:56,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 18:33:56,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:33:56,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:56,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360782780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:56,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:33:56,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-05 18:33:56,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531948164] [2021-06-05 18:33:56,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:33:56,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:33:56,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:33:56,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:33:56,683 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:57,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:33:57,835 INFO L93 Difference]: Finished difference Result 8646 states and 22797 transitions. [2021-06-05 18:33:57,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 18:33:57,835 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-05 18:33:57,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:33:57,842 INFO L225 Difference]: With dead ends: 8646 [2021-06-05 18:33:57,842 INFO L226 Difference]: Without dead ends: 8376 [2021-06-05 18:33:57,843 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1816 ImplicationChecksByTransitivity, 1259.2ms TimeCoverageRelationStatistics Valid=1825, Invalid=6007, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 18:33:57,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8376 states. [2021-06-05 18:33:57,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8376 to 6453. [2021-06-05 18:33:57,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:57,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-05 18:33:57,909 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-05 18:33:57,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:33:57,909 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-05 18:33:57,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:57,909 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-05 18:33:57,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-05 18:33:57,913 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:33:57,913 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:33:58,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 539 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-06-05 18:33:58,114 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:33:58,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:33:58,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1827342898, now seen corresponding path program 536 times [2021-06-05 18:33:58,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:33:58,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897947937] [2021-06-05 18:33:58,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:33:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:33:58,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:58,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:33:58,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897947937] [2021-06-05 18:33:58,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897947937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:58,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977379877] [2021-06-05 18:33:58,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:33:58,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:33:58,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:33:58,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 18:33:58,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:33:58,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:33:58,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977379877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:33:58,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:33:58,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-05 18:33:58,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783078922] [2021-06-05 18:33:58,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:33:58,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:33:58,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:33:58,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:33:58,775 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:59,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:33:59,816 INFO L93 Difference]: Finished difference Result 8596 states and 22697 transitions. [2021-06-05 18:33:59,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 18:33:59,817 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-05 18:33:59,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:33:59,825 INFO L225 Difference]: With dead ends: 8596 [2021-06-05 18:33:59,825 INFO L226 Difference]: Without dead ends: 8326 [2021-06-05 18:33:59,826 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1917 ImplicationChecksByTransitivity, 1125.9ms TimeCoverageRelationStatistics Valid=1881, Invalid=5951, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 18:33:59,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8326 states. [2021-06-05 18:33:59,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8326 to 6453. [2021-06-05 18:33:59,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:59,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-05 18:33:59,913 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-05 18:33:59,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:33:59,914 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-05 18:33:59,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:33:59,914 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-05 18:33:59,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-05 18:33:59,918 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:33:59,918 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:34:00,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:34:00,118 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:34:00,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:34:00,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1184968482, now seen corresponding path program 537 times [2021-06-05 18:34:00,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:34:00,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079749811] [2021-06-05 18:34:00,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:34:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:34:00,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:00,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:34:00,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079749811] [2021-06-05 18:34:00,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079749811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:00,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540736965] [2021-06-05 18:34:00,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:34:00,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-05 18:34:00,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:34:00,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 18:34:00,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:34:00,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:00,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540736965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:00,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:34:00,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-05 18:34:00,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140260598] [2021-06-05 18:34:00,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:34:00,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:34:00,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:34:00,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1275, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:34:00,811 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:01,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:34:01,969 INFO L93 Difference]: Finished difference Result 8546 states and 22597 transitions. [2021-06-05 18:34:01,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 18:34:01,970 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-05 18:34:01,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:34:01,978 INFO L225 Difference]: With dead ends: 8546 [2021-06-05 18:34:01,978 INFO L226 Difference]: Without dead ends: 8276 [2021-06-05 18:34:01,978 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 1251.8ms TimeCoverageRelationStatistics Valid=1847, Invalid=6343, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 18:34:01,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8276 states. [2021-06-05 18:34:02,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8276 to 6453. [2021-06-05 18:34:02,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:02,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-05 18:34:02,043 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-05 18:34:02,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:34:02,043 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-05 18:34:02,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:02,043 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-05 18:34:02,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-05 18:34:02,048 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:34:02,048 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:34:02,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 541 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2021-06-05 18:34:02,248 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:34:02,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:34:02,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1138421552, now seen corresponding path program 538 times [2021-06-05 18:34:02,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:34:02,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105222666] [2021-06-05 18:34:02,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:34:02,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:34:02,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:02,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:34:02,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105222666] [2021-06-05 18:34:02,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105222666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:02,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383860948] [2021-06-05 18:34:02,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:34:02,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:34:02,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:34:02,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 18:34:02,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:34:02,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:02,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383860948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:02,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:34:02,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-05 18:34:02,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091842056] [2021-06-05 18:34:02,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:34:02,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:34:02,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:34:02,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:34:02,913 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:04,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:34:04,000 INFO L93 Difference]: Finished difference Result 8496 states and 22497 transitions. [2021-06-05 18:34:04,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 18:34:04,001 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-05 18:34:04,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:34:04,009 INFO L225 Difference]: With dead ends: 8496 [2021-06-05 18:34:04,009 INFO L226 Difference]: Without dead ends: 8226 [2021-06-05 18:34:04,010 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2058 ImplicationChecksByTransitivity, 1176.0ms TimeCoverageRelationStatistics Valid=1983, Invalid=6207, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 18:34:04,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8226 states. [2021-06-05 18:34:04,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8226 to 6453. [2021-06-05 18:34:04,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:04,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-05 18:34:04,076 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-05 18:34:04,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:34:04,076 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-05 18:34:04,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:04,076 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-05 18:34:04,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-05 18:34:04,080 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:34:04,081 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:34:04,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable546,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:34:04,281 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:34:04,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:34:04,281 INFO L82 PathProgramCache]: Analyzing trace with hash 220037152, now seen corresponding path program 539 times [2021-06-05 18:34:04,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:34:04,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597958924] [2021-06-05 18:34:04,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:34:04,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:34:04,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:04,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:34:04,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597958924] [2021-06-05 18:34:04,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597958924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:04,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445066691] [2021-06-05 18:34:04,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:34:04,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-05 18:34:04,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:34:04,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 18:34:04,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:34:04,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:04,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445066691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:04,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:34:04,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-05 18:34:04,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684854512] [2021-06-05 18:34:04,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:34:04,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:34:04,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:34:04,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1277, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:34:04,991 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:06,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:34:06,240 INFO L93 Difference]: Finished difference Result 8446 states and 22397 transitions. [2021-06-05 18:34:06,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 18:34:06,240 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-05 18:34:06,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:34:06,248 INFO L225 Difference]: With dead ends: 8446 [2021-06-05 18:34:06,248 INFO L226 Difference]: Without dead ends: 8176 [2021-06-05 18:34:06,249 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2100 ImplicationChecksByTransitivity, 1326.4ms TimeCoverageRelationStatistics Valid=2017, Invalid=6539, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 18:34:06,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8176 states. [2021-06-05 18:34:06,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8176 to 6453. [2021-06-05 18:34:06,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:06,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-05 18:34:06,313 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-05 18:34:06,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:34:06,313 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-05 18:34:06,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:06,313 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-05 18:34:06,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-05 18:34:06,317 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:34:06,318 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:34:06,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2021-06-05 18:34:06,518 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:34:06,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:34:06,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1556653650, now seen corresponding path program 540 times [2021-06-05 18:34:06,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:34:06,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905231087] [2021-06-05 18:34:06,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:34:06,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:34:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:06,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:34:06,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905231087] [2021-06-05 18:34:06,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905231087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:06,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515861020] [2021-06-05 18:34:06,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:34:06,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-05 18:34:06,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:34:06,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 18:34:06,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:34:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:07,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515861020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:07,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:34:07,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-05 18:34:07,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614260617] [2021-06-05 18:34:07,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:34:07,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:34:07,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:34:07,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:34:07,173 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:08,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:34:08,348 INFO L93 Difference]: Finished difference Result 8396 states and 22297 transitions. [2021-06-05 18:34:08,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 18:34:08,349 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-05 18:34:08,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:34:08,358 INFO L225 Difference]: With dead ends: 8396 [2021-06-05 18:34:08,358 INFO L226 Difference]: Without dead ends: 8126 [2021-06-05 18:34:08,359 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2203 ImplicationChecksByTransitivity, 1208.0ms TimeCoverageRelationStatistics Valid=2101, Invalid=6455, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 18:34:08,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8126 states. [2021-06-05 18:34:08,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8126 to 6453. [2021-06-05 18:34:08,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:08,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-05 18:34:08,433 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-05 18:34:08,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:34:08,433 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-05 18:34:08,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:08,433 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-05 18:34:08,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-05 18:34:08,438 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:34:08,438 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:34:08,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:34:08,654 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:34:08,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:34:08,654 INFO L82 PathProgramCache]: Analyzing trace with hash 542987934, now seen corresponding path program 541 times [2021-06-05 18:34:08,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:34:08,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139839698] [2021-06-05 18:34:08,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:34:08,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:34:09,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:09,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:34:09,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139839698] [2021-06-05 18:34:09,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139839698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:09,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747990747] [2021-06-05 18:34:09,032 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:34:09,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:34:09,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 18:34:09,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:34:09,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:09,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747990747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:09,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:34:09,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-05 18:34:09,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729754596] [2021-06-05 18:34:09,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:34:09,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:34:09,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:34:09,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1275, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:34:09,330 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:10,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:34:10,720 INFO L93 Difference]: Finished difference Result 8346 states and 22197 transitions. [2021-06-05 18:34:10,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 18:34:10,720 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-05 18:34:10,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:34:10,728 INFO L225 Difference]: With dead ends: 8346 [2021-06-05 18:34:10,728 INFO L226 Difference]: Without dead ends: 8076 [2021-06-05 18:34:10,728 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2248 ImplicationChecksByTransitivity, 1442.3ms TimeCoverageRelationStatistics Valid=2137, Invalid=6793, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 18:34:10,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8076 states. [2021-06-05 18:34:10,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8076 to 6453. [2021-06-05 18:34:10,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:10,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-05 18:34:10,792 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-05 18:34:10,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:34:10,792 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-05 18:34:10,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:10,792 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-05 18:34:10,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-05 18:34:10,798 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:34:10,798 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:34:10,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable549 [2021-06-05 18:34:10,998 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:34:10,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:34:10,999 INFO L82 PathProgramCache]: Analyzing trace with hash 2053188012, now seen corresponding path program 542 times [2021-06-05 18:34:10,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:34:10,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242267369] [2021-06-05 18:34:10,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:34:11,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:34:11,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:11,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:34:11,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242267369] [2021-06-05 18:34:11,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242267369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:11,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904617414] [2021-06-05 18:34:11,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:34:11,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:34:11,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:34:11,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 18:34:11,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:34:11,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:11,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904617414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:11,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:34:11,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-05 18:34:11,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69899550] [2021-06-05 18:34:11,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:34:11,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:34:11,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:34:11,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1190, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:34:11,625 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:12,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:34:12,801 INFO L93 Difference]: Finished difference Result 8296 states and 22097 transitions. [2021-06-05 18:34:12,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 18:34:12,801 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-05 18:34:12,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:34:12,808 INFO L225 Difference]: With dead ends: 8296 [2021-06-05 18:34:12,808 INFO L226 Difference]: Without dead ends: 8026 [2021-06-05 18:34:12,808 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2352 ImplicationChecksByTransitivity, 1217.3ms TimeCoverageRelationStatistics Valid=2235, Invalid=6695, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 18:34:12,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8026 states. [2021-06-05 18:34:12,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8026 to 6453. [2021-06-05 18:34:12,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:12,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-05 18:34:12,872 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-05 18:34:12,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:34:12,872 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-05 18:34:12,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:12,873 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-05 18:34:12,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-05 18:34:12,877 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:34:12,877 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:34:13,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:34:13,077 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:34:13,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:34:13,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1602121060, now seen corresponding path program 543 times [2021-06-05 18:34:13,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:34:13,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299601485] [2021-06-05 18:34:13,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:34:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:34:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:13,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:34:13,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299601485] [2021-06-05 18:34:13,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299601485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:13,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315870235] [2021-06-05 18:34:13,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:34:13,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-05 18:34:13,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:34:13,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 18:34:13,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:34:13,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:13,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315870235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:13,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:34:13,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-05 18:34:13,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276593310] [2021-06-05 18:34:13,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:34:13,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:34:13,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:34:13,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:34:13,751 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:15,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:34:15,118 INFO L93 Difference]: Finished difference Result 8246 states and 21997 transitions. [2021-06-05 18:34:15,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 18:34:15,119 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-05 18:34:15,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:34:15,127 INFO L225 Difference]: With dead ends: 8246 [2021-06-05 18:34:15,127 INFO L226 Difference]: Without dead ends: 7976 [2021-06-05 18:34:15,128 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2330 ImplicationChecksByTransitivity, 1372.1ms TimeCoverageRelationStatistics Valid=2135, Invalid=7177, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 18:34:15,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7976 states. [2021-06-05 18:34:15,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7976 to 6453. [2021-06-05 18:34:15,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:15,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-05 18:34:15,222 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-05 18:34:15,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:34:15,222 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-05 18:34:15,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:15,222 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-05 18:34:15,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-05 18:34:15,226 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:34:15,226 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:34:15,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable551,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:34:15,427 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:34:15,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:34:15,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1917927210, now seen corresponding path program 544 times [2021-06-05 18:34:15,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:34:15,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245246665] [2021-06-05 18:34:15,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:34:15,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:34:15,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:15,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:34:15,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245246665] [2021-06-05 18:34:15,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245246665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:15,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128064944] [2021-06-05 18:34:15,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:34:15,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:34:15,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:34:15,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 18:34:15,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:34:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:16,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128064944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:16,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:34:16,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-05 18:34:16,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005409719] [2021-06-05 18:34:16,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:34:16,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:34:16,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:34:16,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1181, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:34:16,114 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:17,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:34:17,436 INFO L93 Difference]: Finished difference Result 8196 states and 21897 transitions. [2021-06-05 18:34:17,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 18:34:17,437 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-05 18:34:17,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:34:17,445 INFO L225 Difference]: With dead ends: 8196 [2021-06-05 18:34:17,445 INFO L226 Difference]: Without dead ends: 7926 [2021-06-05 18:34:17,446 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2505 ImplicationChecksByTransitivity, 1335.1ms TimeCoverageRelationStatistics Valid=2385, Invalid=6927, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 18:34:17,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7926 states. [2021-06-05 18:34:17,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7926 to 6453. [2021-06-05 18:34:17,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:17,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-05 18:34:17,520 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-05 18:34:17,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:34:17,520 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-05 18:34:17,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:17,520 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-05 18:34:17,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-05 18:34:17,525 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:34:17,525 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:34:17,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-06-05 18:34:17,738 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:34:17,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:34:17,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1464013850, now seen corresponding path program 545 times [2021-06-05 18:34:17,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:34:17,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238126484] [2021-06-05 18:34:17,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:34:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:34:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:18,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:34:18,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238126484] [2021-06-05 18:34:18,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238126484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:18,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066851240] [2021-06-05 18:34:18,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:34:18,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-05 18:34:18,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:34:18,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 18:34:18,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:34:18,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:18,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066851240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:18,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:34:18,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-05 18:34:18,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768841254] [2021-06-05 18:34:18,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:34:18,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:34:18,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:34:18,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:34:18,541 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:20,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:34:20,123 INFO L93 Difference]: Finished difference Result 8146 states and 21797 transitions. [2021-06-05 18:34:20,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 18:34:20,123 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-05 18:34:20,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:34:20,131 INFO L225 Difference]: With dead ends: 8146 [2021-06-05 18:34:20,132 INFO L226 Difference]: Without dead ends: 7876 [2021-06-05 18:34:20,133 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2556 ImplicationChecksByTransitivity, 1649.5ms TimeCoverageRelationStatistics Valid=2425, Invalid=7277, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 18:34:20,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7876 states. [2021-06-05 18:34:20,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7876 to 6453. [2021-06-05 18:34:20,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:20,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-05 18:34:20,207 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-05 18:34:20,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:34:20,207 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-05 18:34:20,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:20,207 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-05 18:34:20,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-05 18:34:20,212 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:34:20,212 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:34:20,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable553,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:34:20,417 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:34:20,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:34:20,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1952941528, now seen corresponding path program 546 times [2021-06-05 18:34:20,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:34:20,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31000593] [2021-06-05 18:34:20,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:34:20,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:34:20,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:20,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:34:20,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31000593] [2021-06-05 18:34:20,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31000593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:20,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246186692] [2021-06-05 18:34:20,801 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:34:20,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-05 18:34:20,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:34:20,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 18:34:20,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:34:21,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:21,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246186692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:21,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:34:21,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-05 18:34:21,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068210514] [2021-06-05 18:34:21,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:34:21,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:34:21,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:34:21,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:34:21,080 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:22,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:34:22,342 INFO L93 Difference]: Finished difference Result 8096 states and 21697 transitions. [2021-06-05 18:34:22,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 18:34:22,342 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-05 18:34:22,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:34:22,350 INFO L225 Difference]: With dead ends: 8096 [2021-06-05 18:34:22,350 INFO L226 Difference]: Without dead ends: 7826 [2021-06-05 18:34:22,351 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2662 ImplicationChecksByTransitivity, 1302.0ms TimeCoverageRelationStatistics Valid=2551, Invalid=7151, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 18:34:22,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7826 states. [2021-06-05 18:34:22,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7826 to 6453. [2021-06-05 18:34:22,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:22,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-05 18:34:22,416 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-05 18:34:22,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:34:22,416 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-05 18:34:22,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:22,417 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-05 18:34:22,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-05 18:34:22,421 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:34:22,421 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:34:22,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-06-05 18:34:22,621 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:34:22,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:34:22,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1441970968, now seen corresponding path program 547 times [2021-06-05 18:34:22,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:34:22,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202612665] [2021-06-05 18:34:22,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:34:22,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:34:22,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:22,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:34:22,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202612665] [2021-06-05 18:34:22,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202612665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:22,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793815703] [2021-06-05 18:34:22,983 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:34:23,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:34:23,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 18:34:23,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:34:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:23,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793815703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:23,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:34:23,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-05 18:34:23,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996376611] [2021-06-05 18:34:23,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:34:23,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:34:23,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:34:23,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:34:23,290 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:24,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:34:24,803 INFO L93 Difference]: Finished difference Result 8046 states and 21597 transitions. [2021-06-05 18:34:24,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 18:34:24,803 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-05 18:34:24,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:34:24,811 INFO L225 Difference]: With dead ends: 8046 [2021-06-05 18:34:24,811 INFO L226 Difference]: Without dead ends: 7776 [2021-06-05 18:34:24,812 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2716 ImplicationChecksByTransitivity, 1507.7ms TimeCoverageRelationStatistics Valid=2593, Invalid=7507, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 18:34:24,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7776 states. [2021-06-05 18:34:24,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7776 to 6453. [2021-06-05 18:34:24,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:24,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-05 18:34:24,880 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-05 18:34:24,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:34:24,880 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-05 18:34:24,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:24,880 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-05 18:34:24,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-05 18:34:24,884 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:34:24,885 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:34:25,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable555,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:34:25,085 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:34:25,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:34:25,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1012906662, now seen corresponding path program 548 times [2021-06-05 18:34:25,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:34:25,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364151570] [2021-06-05 18:34:25,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:34:25,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:34:25,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:25,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:34:25,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364151570] [2021-06-05 18:34:25,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364151570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:25,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002605465] [2021-06-05 18:34:25,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:34:25,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:34:25,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:34:25,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 18:34:25,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:34:25,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:25,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002605465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:25,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:34:25,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-05 18:34:25,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945840528] [2021-06-05 18:34:25,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:34:25,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:34:25,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:34:25,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:34:25,705 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:27,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:34:27,082 INFO L93 Difference]: Finished difference Result 7996 states and 21497 transitions. [2021-06-05 18:34:27,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 18:34:27,082 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-05 18:34:27,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:34:27,091 INFO L225 Difference]: With dead ends: 7996 [2021-06-05 18:34:27,091 INFO L226 Difference]: Without dead ends: 7726 [2021-06-05 18:34:27,092 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2823 ImplicationChecksByTransitivity, 1327.3ms TimeCoverageRelationStatistics Valid=2733, Invalid=7367, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 18:34:27,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7726 states. [2021-06-05 18:34:27,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7726 to 6453. [2021-06-05 18:34:27,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:27,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-05 18:34:27,158 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-05 18:34:27,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:34:27,158 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-05 18:34:27,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:27,158 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-05 18:34:27,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-05 18:34:27,162 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:34:27,162 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:34:27,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-06-05 18:34:27,363 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:34:27,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:34:27,363 INFO L82 PathProgramCache]: Analyzing trace with hash 326723478, now seen corresponding path program 549 times [2021-06-05 18:34:27,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:34:27,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393175135] [2021-06-05 18:34:27,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:34:27,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:34:27,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:27,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:34:27,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393175135] [2021-06-05 18:34:27,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393175135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:27,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44585241] [2021-06-05 18:34:27,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:34:27,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-05 18:34:27,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:34:27,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 18:34:27,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:34:28,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:28,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44585241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:28,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:34:28,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-05 18:34:28,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530951680] [2021-06-05 18:34:28,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:34:28,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:34:28,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:34:28,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:34:28,018 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:29,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:34:29,530 INFO L93 Difference]: Finished difference Result 7946 states and 21397 transitions. [2021-06-05 18:34:29,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 18:34:29,530 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-05 18:34:29,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:34:29,539 INFO L225 Difference]: With dead ends: 7946 [2021-06-05 18:34:29,539 INFO L226 Difference]: Without dead ends: 7676 [2021-06-05 18:34:29,540 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2768 ImplicationChecksByTransitivity, 1507.1ms TimeCoverageRelationStatistics Valid=2540, Invalid=7966, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 18:34:29,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7676 states. [2021-06-05 18:34:29,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7676 to 6453. [2021-06-05 18:34:29,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:29,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-05 18:34:29,607 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-05 18:34:29,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:34:29,608 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-05 18:34:29,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:29,608 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-05 18:34:29,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-05 18:34:29,612 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:34:29,612 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:34:29,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable557,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:34:29,813 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:34:29,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:34:29,813 INFO L82 PathProgramCache]: Analyzing trace with hash 241688740, now seen corresponding path program 550 times [2021-06-05 18:34:29,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:34:29,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258806490] [2021-06-05 18:34:29,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:34:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:34:30,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:30,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:34:30,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258806490] [2021-06-05 18:34:30,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258806490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:30,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797413942] [2021-06-05 18:34:30,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:34:30,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:34:30,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:34:30,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 18:34:30,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:34:30,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:30,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797413942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:30,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:34:30,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-05 18:34:30,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379165867] [2021-06-05 18:34:30,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:34:30,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:34:30,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:34:30,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1130, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:34:30,433 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:31,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:34:31,807 INFO L93 Difference]: Finished difference Result 7896 states and 21297 transitions. [2021-06-05 18:34:31,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 18:34:31,808 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-05 18:34:31,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:34:31,815 INFO L225 Difference]: With dead ends: 7896 [2021-06-05 18:34:31,815 INFO L226 Difference]: Without dead ends: 7626 [2021-06-05 18:34:31,816 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2988 ImplicationChecksByTransitivity, 1359.0ms TimeCoverageRelationStatistics Valid=2931, Invalid=7575, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 18:34:31,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7626 states. [2021-06-05 18:34:31,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7626 to 6453. [2021-06-05 18:34:31,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:31,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-05 18:34:31,880 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-05 18:34:31,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:34:31,880 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-05 18:34:31,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:31,880 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-05 18:34:31,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-05 18:34:31,885 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:34:31,885 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:34:32,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 554 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-06-05 18:34:32,085 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:34:32,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:34:32,085 INFO L82 PathProgramCache]: Analyzing trace with hash 173537684, now seen corresponding path program 551 times [2021-06-05 18:34:32,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:34:32,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287528323] [2021-06-05 18:34:32,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:34:32,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:34:32,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:32,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:34:32,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287528323] [2021-06-05 18:34:32,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287528323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:32,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523393459] [2021-06-05 18:34:32,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:34:32,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-05 18:34:32,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:34:32,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 18:34:32,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:34:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:32,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523393459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:32,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:34:32,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-05 18:34:32,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153424023] [2021-06-05 18:34:32,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:34:32,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:34:32,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:34:32,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1205, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:34:32,740 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:34,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:34:34,399 INFO L93 Difference]: Finished difference Result 7846 states and 21197 transitions. [2021-06-05 18:34:34,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 18:34:34,400 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-05 18:34:34,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:34:34,407 INFO L225 Difference]: With dead ends: 7846 [2021-06-05 18:34:34,407 INFO L226 Difference]: Without dead ends: 7576 [2021-06-05 18:34:34,407 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3048 ImplicationChecksByTransitivity, 1672.9ms TimeCoverageRelationStatistics Valid=2977, Invalid=7943, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 18:34:34,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7576 states. [2021-06-05 18:34:34,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7576 to 6453. [2021-06-05 18:34:34,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:34,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-05 18:34:34,471 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-05 18:34:34,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:34:34,471 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-05 18:34:34,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:34,472 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-05 18:34:34,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-05 18:34:34,476 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:34:34,476 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:34:34,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:34:34,676 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:34:34,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:34:34,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1123431390, now seen corresponding path program 552 times [2021-06-05 18:34:34,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:34:34,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716982043] [2021-06-05 18:34:34,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:34:34,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:34:35,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:35,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:34:35,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716982043] [2021-06-05 18:34:35,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716982043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:35,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735587980] [2021-06-05 18:34:35,038 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:34:35,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-05 18:34:35,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:34:35,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 18:34:35,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:34:35,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:35,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735587980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:35,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:34:35,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-05 18:34:35,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180851306] [2021-06-05 18:34:35,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:34:35,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:34:35,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:34:35,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1105, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:34:35,311 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:36,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:34:36,748 INFO L93 Difference]: Finished difference Result 7796 states and 21097 transitions. [2021-06-05 18:34:36,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 18:34:36,748 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-05 18:34:36,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:34:36,755 INFO L225 Difference]: With dead ends: 7796 [2021-06-05 18:34:36,755 INFO L226 Difference]: Without dead ends: 7526 [2021-06-05 18:34:36,756 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3157 ImplicationChecksByTransitivity, 1415.7ms TimeCoverageRelationStatistics Valid=3145, Invalid=7775, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 18:34:36,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7526 states. [2021-06-05 18:34:36,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7526 to 6453. [2021-06-05 18:34:36,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:36,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-05 18:34:36,818 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-05 18:34:36,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:34:36,818 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-05 18:34:36,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:36,818 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-05 18:34:36,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-05 18:34:36,823 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:34:36,823 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:34:37,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,556 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:34:37,023 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:34:37,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:34:37,023 INFO L82 PathProgramCache]: Analyzing trace with hash -693677806, now seen corresponding path program 553 times [2021-06-05 18:34:37,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:34:37,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678657544] [2021-06-05 18:34:37,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:34:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:34:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:37,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:34:37,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678657544] [2021-06-05 18:34:37,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678657544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:37,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389455723] [2021-06-05 18:34:37,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:34:37,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:34:37,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 18:34:37,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:34:37,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:37,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389455723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:37,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:34:37,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-05 18:34:37,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079588638] [2021-06-05 18:34:37,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:34:37,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:34:37,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:34:37,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=1179, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:34:37,680 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:39,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:34:39,403 INFO L93 Difference]: Finished difference Result 7806 states and 21147 transitions. [2021-06-05 18:34:39,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 18:34:39,403 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-05 18:34:39,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:34:39,410 INFO L225 Difference]: With dead ends: 7806 [2021-06-05 18:34:39,410 INFO L226 Difference]: Without dead ends: 7536 [2021-06-05 18:34:39,410 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3220 ImplicationChecksByTransitivity, 1675.9ms TimeCoverageRelationStatistics Valid=3193, Invalid=8149, Unknown=0, NotChecked=0, Total=11342 [2021-06-05 18:34:39,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7536 states. [2021-06-05 18:34:39,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7536 to 6453. [2021-06-05 18:34:39,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.8344699318040916) internal successors, (18288), 6452 states have internal predecessors, (18288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:39,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18288 transitions. [2021-06-05 18:34:39,470 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18288 transitions. Word has length 195 [2021-06-05 18:34:39,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:34:39,470 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18288 transitions. [2021-06-05 18:34:39,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:39,470 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18288 transitions. [2021-06-05 18:34:39,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-05 18:34:39,475 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:34:39,475 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:34:39,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:34:39,675 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:34:39,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:34:39,675 INFO L82 PathProgramCache]: Analyzing trace with hash -751411936, now seen corresponding path program 554 times [2021-06-05 18:34:39,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:34:39,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666353177] [2021-06-05 18:34:39,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:34:39,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:34:40,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:40,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:34:40,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666353177] [2021-06-05 18:34:40,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666353177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:40,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737694019] [2021-06-05 18:34:40,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:34:40,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:34:40,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:34:40,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 18:34:40,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:34:40,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:40,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737694019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:40,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:34:40,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-05 18:34:40,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789055512] [2021-06-05 18:34:40,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:34:40,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:34:40,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:34:40,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1076, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:34:40,303 INFO L87 Difference]: Start difference. First operand 6453 states and 18288 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:41,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:34:41,773 INFO L93 Difference]: Finished difference Result 8548 states and 23271 transitions. [2021-06-05 18:34:41,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 18:34:41,774 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-05 18:34:41,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:34:41,783 INFO L225 Difference]: With dead ends: 8548 [2021-06-05 18:34:41,783 INFO L226 Difference]: Without dead ends: 8278 [2021-06-05 18:34:41,783 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3329 ImplicationChecksByTransitivity, 1453.7ms TimeCoverageRelationStatistics Valid=3376, Invalid=7966, Unknown=0, NotChecked=0, Total=11342 [2021-06-05 18:34:41,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8278 states. [2021-06-05 18:34:41,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8278 to 6633. [2021-06-05 18:34:41,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6633 states, 6632 states have (on average 2.8418275030156814) internal successors, (18847), 6632 states have internal predecessors, (18847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:41,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6633 states to 6633 states and 18847 transitions. [2021-06-05 18:34:41,846 INFO L78 Accepts]: Start accepts. Automaton has 6633 states and 18847 transitions. Word has length 195 [2021-06-05 18:34:41,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:34:41,846 INFO L482 AbstractCegarLoop]: Abstraction has 6633 states and 18847 transitions. [2021-06-05 18:34:41,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:41,846 INFO L276 IsEmpty]: Start isEmpty. Operand 6633 states and 18847 transitions. [2021-06-05 18:34:41,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-05 18:34:41,850 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:34:41,850 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:34:42,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 558 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-06-05 18:34:42,051 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:34:42,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:34:42,051 INFO L82 PathProgramCache]: Analyzing trace with hash -729068686, now seen corresponding path program 555 times [2021-06-05 18:34:42,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:34:42,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150854028] [2021-06-05 18:34:42,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:34:42,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:34:42,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:42,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:34:42,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150854028] [2021-06-05 18:34:42,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150854028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:42,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720923994] [2021-06-05 18:34:42,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:34:42,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-05 18:34:42,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:34:42,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 18:34:42,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:34:42,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:42,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720923994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:42,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:34:42,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 40 [2021-06-05 18:34:42,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350364885] [2021-06-05 18:34:42,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 18:34:42,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:34:42,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 18:34:42,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=1224, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:34:42,725 INFO L87 Difference]: Start difference. First operand 6633 states and 18847 transitions. Second operand has 40 states, 40 states have (on average 4.95) internal successors, (198), 40 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:44,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:34:44,514 INFO L93 Difference]: Finished difference Result 8416 states and 22936 transitions. [2021-06-05 18:34:44,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 18:34:44,515 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.95) internal successors, (198), 40 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-06-05 18:34:44,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:34:44,521 INFO L225 Difference]: With dead ends: 8416 [2021-06-05 18:34:44,522 INFO L226 Difference]: Without dead ends: 7841 [2021-06-05 18:34:44,522 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3516 ImplicationChecksByTransitivity, 1706.7ms TimeCoverageRelationStatistics Valid=3161, Invalid=9495, Unknown=0, NotChecked=0, Total=12656 [2021-06-05 18:34:44,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7841 states. [2021-06-05 18:34:44,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7841 to 4124. [2021-06-05 18:34:44,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4124 states, 4123 states have (on average 2.742178025709435) internal successors, (11306), 4123 states have internal predecessors, (11306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:44,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4124 states to 4124 states and 11306 transitions. [2021-06-05 18:34:44,568 INFO L78 Accepts]: Start accepts. Automaton has 4124 states and 11306 transitions. Word has length 195 [2021-06-05 18:34:44,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:34:44,569 INFO L482 AbstractCegarLoop]: Abstraction has 4124 states and 11306 transitions. [2021-06-05 18:34:44,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 4.95) internal successors, (198), 40 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:44,569 INFO L276 IsEmpty]: Start isEmpty. Operand 4124 states and 11306 transitions. [2021-06-05 18:34:44,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-06-05 18:34:44,571 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:34:44,571 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:34:44,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable563 [2021-06-05 18:34:44,773 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:34:44,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:34:44,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1125989382, now seen corresponding path program 556 times [2021-06-05 18:34:44,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:34:44,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119771098] [2021-06-05 18:34:44,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:34:44,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:34:45,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:45,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:34:45,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119771098] [2021-06-05 18:34:45,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119771098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:45,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52938117] [2021-06-05 18:34:45,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:34:45,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:34:45,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:34:45,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 18:34:45,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:34:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:45,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52938117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:45,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:34:45,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 42 [2021-06-05 18:34:45,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351055971] [2021-06-05 18:34:45,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 18:34:45,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:34:45,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 18:34:45,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=1330, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:34:45,546 INFO L87 Difference]: Start difference. First operand 4124 states and 11306 transitions. Second operand has 42 states, 42 states have (on average 5.428571428571429) internal successors, (228), 42 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:46,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:34:46,502 INFO L93 Difference]: Finished difference Result 5614 states and 14606 transitions. [2021-06-05 18:34:46,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:34:46,502 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 5.428571428571429) internal successors, (228), 42 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-06-05 18:34:46,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:34:46,508 INFO L225 Difference]: With dead ends: 5614 [2021-06-05 18:34:46,508 INFO L226 Difference]: Without dead ends: 5280 [2021-06-05 18:34:46,508 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 1092.2ms TimeCoverageRelationStatistics Valid=1845, Invalid=4797, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 18:34:46,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5280 states. [2021-06-05 18:34:46,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5280 to 4209. [2021-06-05 18:34:46,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4209 states, 4208 states have (on average 2.7271863117870723) internal successors, (11476), 4208 states have internal predecessors, (11476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:46,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4209 states to 4209 states and 11476 transitions. [2021-06-05 18:34:46,548 INFO L78 Accepts]: Start accepts. Automaton has 4209 states and 11476 transitions. Word has length 200 [2021-06-05 18:34:46,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:34:46,548 INFO L482 AbstractCegarLoop]: Abstraction has 4209 states and 11476 transitions. [2021-06-05 18:34:46,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 5.428571428571429) internal successors, (228), 42 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:34:46,548 INFO L276 IsEmpty]: Start isEmpty. Operand 4209 states and 11476 transitions. [2021-06-05 18:34:46,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-06-05 18:34:46,551 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:34:46,551 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:34:46,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 560 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-06-05 18:34:46,752 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:34:46,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:34:46,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1281653858, now seen corresponding path program 557 times [2021-06-05 18:34:46,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:34:46,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602432224] [2021-06-05 18:34:46,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:34:46,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:34:47,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:34:47,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:34:47,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602432224] [2021-06-05 18:34:47,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602432224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:34:47,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149339651] [2021-06-05 18:34:47,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true Received shutdown request... [2021-06-05 18:34:47,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-06-05 18:34:47,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:34:47,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 18:34:47,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:34:47,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 561 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-06-05 18:34:47,548 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 18:34:47,549 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 18:34:47,551 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 18:34:47,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 06:34:47 BasicIcfg [2021-06-05 18:34:47,551 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 18:34:47,551 INFO L168 Benchmark]: Toolchain (without parser) took 839729.16 ms. Allocated memory was 354.4 MB in the beginning and 1.3 GB in the end (delta: 983.6 MB). Free memory was 316.7 MB in the beginning and 1.1 GB in the end (delta: -780.1 MB). Peak memory consumption was 203.7 MB. Max. memory is 16.0 GB. [2021-06-05 18:34:47,552 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 354.4 MB. Free memory was 334.9 MB in the beginning and 334.9 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 18:34:47,553 INFO L168 Benchmark]: CACSL2BoogieTranslator took 396.32 ms. Allocated memory is still 354.4 MB. Free memory was 316.6 MB in the beginning and 318.0 MB in the end (delta: -1.4 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.0 GB. [2021-06-05 18:34:47,553 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.13 ms. Allocated memory is still 354.4 MB. Free memory was 318.0 MB in the beginning and 315.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 18:34:47,553 INFO L168 Benchmark]: Boogie Preprocessor took 13.84 ms. Allocated memory is still 354.4 MB. Free memory was 315.9 MB in the beginning and 314.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 18:34:47,553 INFO L168 Benchmark]: RCFGBuilder took 390.64 ms. Allocated memory is still 354.4 MB. Free memory was 314.8 MB in the beginning and 291.8 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-06-05 18:34:47,553 INFO L168 Benchmark]: TraceAbstraction took 838899.64 ms. Allocated memory was 354.4 MB in the beginning and 1.3 GB in the end (delta: 983.6 MB). Free memory was 290.7 MB in the beginning and 1.1 GB in the end (delta: -806.1 MB). Peak memory consumption was 179.5 MB. Max. memory is 16.0 GB. [2021-06-05 18:34:47,553 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 354.4 MB. Free memory was 334.9 MB in the beginning and 334.9 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 396.32 ms. Allocated memory is still 354.4 MB. Free memory was 316.6 MB in the beginning and 318.0 MB in the end (delta: -1.4 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.13 ms. Allocated memory is still 354.4 MB. Free memory was 318.0 MB in the beginning and 315.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.84 ms. Allocated memory is still 354.4 MB. Free memory was 315.9 MB in the beginning and 314.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 390.64 ms. Allocated memory is still 354.4 MB. Free memory was 314.8 MB in the beginning and 291.8 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 838899.64 ms. Allocated memory was 354.4 MB in the beginning and 1.3 GB in the end (delta: 983.6 MB). Free memory was 290.7 MB in the beginning and 1.1 GB in the end (delta: -806.1 MB). Peak memory consumption was 179.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 722]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while BasicCegarLoop was analyzing trace of length 201 with TraceHistMax 17,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 838813.5ms, OverallIterations: 566, TraceHistogramMax: 17, EmptinessCheckTime: 1749.0ms, AutomataDifference: 425310.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 59.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 54650 SDtfs, 725245 SDslu, 617370 SDs, 0 SdLazy, 114950 SolverSat, 122284 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 68286.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115425 GetRequests, 79472 SyntacticMatches, 0 SemanticMatches, 35953 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631264 ImplicationChecksByTransitivity, 437044.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=6633occurred in iteration=563, InterpolantAutomatonStates: 25020, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 25183.0ms AutomataMinimizationTime, 565 MinimizatonAttempts, 700615 StatesRemovedByMinimization, 565 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 6429.2ms SsaConstructionTime, 18451.2ms SatisfiabilityAnalysisTime, 229627.3ms InterpolantComputationTime, 159198 NumberOfCodeBlocks, 159198 NumberOfCodeBlocksAsserted, 4368 NumberOfCheckSat, 158074 ConstructedInterpolants, 0 QuantifiedInterpolants, 695640 SizeOfPredicates, 13118 NumberOfNonLiveVariables, 154008 ConjunctsInSsa, 16767 ConjunctsInUnsatCore, 1124 InterpolantComputations, 6 PerfectInterpolantSequences, 1/657700 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown