/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 07:56:30,839 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 07:56:30,842 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 07:56:30,879 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 07:56:30,880 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 07:56:30,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 07:56:30,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 07:56:30,890 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 07:56:30,892 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 07:56:30,897 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 07:56:30,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 07:56:30,899 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 07:56:30,899 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 07:56:30,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 07:56:30,902 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 07:56:30,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 07:56:30,905 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 07:56:30,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 07:56:30,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 07:56:30,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 07:56:30,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 07:56:30,916 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 07:56:30,917 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 07:56:30,918 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 07:56:30,924 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 07:56:30,927 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 07:56:30,928 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 07:56:30,929 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 07:56:30,929 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 07:56:30,931 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 07:56:30,931 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 07:56:30,931 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 07:56:30,931 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 07:56:30,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 07:56:30,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 07:56:30,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 07:56:30,933 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-Separate.epf [2021-06-05 07:56:30,969 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 07:56:30,969 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 07:56:30,969 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 07:56:30,970 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 07:56:30,972 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 07:56:30,972 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 07:56:30,972 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 07:56:30,973 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 07:56:30,973 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 07:56:30,973 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 07:56:30,973 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 07:56:30,974 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 07:56:30,974 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 07:56:30,974 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 07:56:30,974 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 07:56:30,974 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 07:56:30,974 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 07:56:30,974 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 07:56:30,975 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 07:56:30,975 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 07:56:30,975 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 07:56:30,975 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 07:56:30,975 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 07:56:30,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 07:56:30,975 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 07:56:30,975 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 07:56:30,975 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 07:56:30,976 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 07:56:30,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 07:56:30,976 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 07:56:30,976 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 07:56:30,976 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 07:56:30,976 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 07:56:31,265 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 07:56:31,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 07:56:31,292 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 07:56:31,293 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-05 07:56:31,293 INFO L275 PluginConnector]: CDTParser initialized [2021-06-05 07:56:31,294 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2021-06-05 07:56:31,365 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbec77588/798dd0c75b2d4c5babfa754596832e3a/FLAGf5ca575dc [2021-06-05 07:56:31,782 INFO L306 CDTParser]: Found 1 translation units. [2021-06-05 07:56:31,783 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2021-06-05 07:56:31,800 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbec77588/798dd0c75b2d4c5babfa754596832e3a/FLAGf5ca575dc [2021-06-05 07:56:32,112 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbec77588/798dd0c75b2d4c5babfa754596832e3a [2021-06-05 07:56:32,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 07:56:32,115 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-05 07:56:32,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-05 07:56:32,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-05 07:56:32,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-05 07:56:32,136 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 07:56:32" (1/1) ... [2021-06-05 07:56:32,137 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@384f1ba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:56:32, skipping insertion in model container [2021-06-05 07:56:32,137 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 07:56:32" (1/1) ... [2021-06-05 07:56:32,143 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-05 07:56:32,193 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-05 07:56:32,403 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-longer-1.i[30961,30974] [2021-06-05 07:56:32,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 07:56:32,426 INFO L203 MainTranslator]: Completed pre-run [2021-06-05 07:56:32,485 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-longer-1.i[30961,30974] [2021-06-05 07:56:32,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 07:56:32,536 INFO L208 MainTranslator]: Completed translation [2021-06-05 07:56:32,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:56:32 WrapperNode [2021-06-05 07:56:32,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-05 07:56:32,538 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 07:56:32,538 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 07:56:32,538 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 07:56:32,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:56:32" (1/1) ... [2021-06-05 07:56:32,553 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:56:32" (1/1) ... [2021-06-05 07:56:32,568 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 07:56:32,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 07:56:32,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 07:56:32,569 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 07:56:32,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:56:32" (1/1) ... [2021-06-05 07:56:32,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:56:32" (1/1) ... [2021-06-05 07:56:32,577 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:56:32" (1/1) ... [2021-06-05 07:56:32,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:56:32" (1/1) ... [2021-06-05 07:56:32,591 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:56:32" (1/1) ... [2021-06-05 07:56:32,595 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:56:32" (1/1) ... [2021-06-05 07:56:32,596 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:56:32" (1/1) ... [2021-06-05 07:56:32,598 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 07:56:32,599 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 07:56:32,605 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 07:56:32,605 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 07:56:32,606 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:56:32" (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 07:56:32,661 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-06-05 07:56:32,661 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-06-05 07:56:32,661 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-06-05 07:56:32,661 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-06-05 07:56:32,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-05 07:56:32,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-06-05 07:56:32,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-05 07:56:32,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-05 07:56:32,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-05 07:56:32,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-06-05 07:56:32,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 07:56:32,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 07:56:32,664 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 07:56:32,905 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 07:56:32,905 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-06-05 07:56:32,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 07:56:32 BoogieIcfgContainer [2021-06-05 07:56:32,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 07:56:32,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 07:56:32,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 07:56:32,911 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 07:56:32,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.06 07:56:32" (1/3) ... [2021-06-05 07:56:32,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@284f7f8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 07:56:32, skipping insertion in model container [2021-06-05 07:56:32,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:56:32" (2/3) ... [2021-06-05 07:56:32,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@284f7f8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 07:56:32, skipping insertion in model container [2021-06-05 07:56:32,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 07:56:32" (3/3) ... [2021-06-05 07:56:32,913 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2021-06-05 07:56:32,918 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 07:56:32,918 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 07:56:32,919 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 07:56:32,919 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 07:56:32,943 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,944 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,944 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,944 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,944 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,944 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,945 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,945 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,945 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,945 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,945 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,946 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,946 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,946 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,946 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,946 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,947 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,947 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,947 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,947 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,947 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,948 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,948 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,948 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,948 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,948 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,948 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,948 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,949 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,949 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,949 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,949 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,949 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,950 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,950 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,950 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,950 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,950 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,950 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,951 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,951 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,951 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,951 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,951 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,952 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,952 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,952 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,952 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,952 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,952 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,953 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,953 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,953 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,953 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,953 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,953 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,955 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,956 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,956 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,956 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,956 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,956 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,960 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,960 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,961 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,961 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,961 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,961 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:32,963 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 07:56:32,982 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 07:56:33,015 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 07:56:33,015 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 07:56:33,015 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 07:56:33,016 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 07:56:33,016 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 07:56:33,016 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 07:56:33,016 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 07:56:33,016 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 07:56:33,025 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 66 transitions, 142 flow [2021-06-05 07:56:33,142 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 07:56:33,148 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 07:56:33,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 07:56:33,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:33,170 INFO L521 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 07:56:33,170 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:33,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:33,178 INFO L82 PathProgramCache]: Analyzing trace with hash 855509438, now seen corresponding path program 1 times [2021-06-05 07:56:33,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:33,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935930396] [2021-06-05 07:56:33,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:33,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:33,615 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 07:56:33,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:33,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935930396] [2021-06-05 07:56:33,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935930396] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:56:33,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:56:33,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 07:56:33,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127797934] [2021-06-05 07:56:33,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:56:33,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:33,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:56:33,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:56:33,653 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 07:56:33,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:33,820 INFO L93 Difference]: Finished difference Result 3294 states and 9568 transitions. [2021-06-05 07:56:33,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:56:33,822 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 07:56:33,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:33,847 INFO L225 Difference]: With dead ends: 3294 [2021-06-05 07:56:33,847 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 07:56:33,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:56:33,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 07:56:33,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 800. [2021-06-05 07:56:33,963 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 07:56:33,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2180 transitions. [2021-06-05 07:56:33,979 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2180 transitions. Word has length 32 [2021-06-05 07:56:33,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:33,980 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2180 transitions. [2021-06-05 07:56:33,980 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 07:56:33,980 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2180 transitions. [2021-06-05 07:56:33,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:56:33,983 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:33,983 INFO L521 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 07:56:33,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 07:56:33,983 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:33,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:33,987 INFO L82 PathProgramCache]: Analyzing trace with hash 2058414913, now seen corresponding path program 1 times [2021-06-05 07:56:33,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:33,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780336480] [2021-06-05 07:56:33,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:34,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:34,137 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 07:56:34,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:34,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780336480] [2021-06-05 07:56:34,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780336480] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:56:34,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:56:34,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 07:56:34,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225199598] [2021-06-05 07:56:34,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:56:34,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:34,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:56:34,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:56:34,143 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 07:56:34,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:34,255 INFO L93 Difference]: Finished difference Result 1302 states and 3436 transitions. [2021-06-05 07:56:34,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:56:34,255 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 07:56:34,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:34,263 INFO L225 Difference]: With dead ends: 1302 [2021-06-05 07:56:34,263 INFO L226 Difference]: Without dead ends: 920 [2021-06-05 07:56:34,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:56:34,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-06-05 07:56:34,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 864. [2021-06-05 07:56:34,290 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 07:56:34,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2320 transitions. [2021-06-05 07:56:34,295 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2320 transitions. Word has length 36 [2021-06-05 07:56:34,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:34,296 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2320 transitions. [2021-06-05 07:56:34,296 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 07:56:34,297 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2320 transitions. [2021-06-05 07:56:34,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 07:56:34,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:34,302 INFO L521 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 07:56:34,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 07:56:34,302 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:34,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:34,309 INFO L82 PathProgramCache]: Analyzing trace with hash 307394794, now seen corresponding path program 1 times [2021-06-05 07:56:34,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:34,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061666741] [2021-06-05 07:56:34,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:34,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:34,387 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 07:56:34,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:34,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061666741] [2021-06-05 07:56:34,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061666741] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:56:34,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:56:34,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 07:56:34,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9995119] [2021-06-05 07:56:34,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 07:56:34,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:34,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 07:56:34,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:56:34,389 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 07:56:34,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:34,566 INFO L93 Difference]: Finished difference Result 1304 states and 3456 transitions. [2021-06-05 07:56:34,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 07:56:34,566 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 07:56:34,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:34,571 INFO L225 Difference]: With dead ends: 1304 [2021-06-05 07:56:34,571 INFO L226 Difference]: Without dead ends: 1044 [2021-06-05 07:56:34,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:56:34,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-06-05 07:56:34,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 876. [2021-06-05 07:56:34,592 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 07:56:34,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2368 transitions. [2021-06-05 07:56:34,595 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2368 transitions. Word has length 40 [2021-06-05 07:56:34,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:34,596 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2368 transitions. [2021-06-05 07:56:34,596 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 07:56:34,596 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2368 transitions. [2021-06-05 07:56:34,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 07:56:34,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:34,599 INFO L521 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 07:56:34,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 07:56:34,600 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:34,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:34,601 INFO L82 PathProgramCache]: Analyzing trace with hash -258094508, now seen corresponding path program 2 times [2021-06-05 07:56:34,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:34,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294182550] [2021-06-05 07:56:34,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:34,720 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 07:56:34,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:34,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294182550] [2021-06-05 07:56:34,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294182550] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:56:34,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:56:34,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 07:56:34,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547368402] [2021-06-05 07:56:34,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:56:34,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:34,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:56:34,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:56:34,725 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 07:56:34,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:34,847 INFO L93 Difference]: Finished difference Result 1772 states and 4744 transitions. [2021-06-05 07:56:34,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 07:56:34,851 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 07:56:34,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:34,858 INFO L225 Difference]: With dead ends: 1772 [2021-06-05 07:56:34,860 INFO L226 Difference]: Without dead ends: 1505 [2021-06-05 07:56:34,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:56:34,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-06-05 07:56:34,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 975. [2021-06-05 07:56:34,886 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 07:56:34,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2628 transitions. [2021-06-05 07:56:34,890 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2628 transitions. Word has length 40 [2021-06-05 07:56:34,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:34,892 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 2628 transitions. [2021-06-05 07:56:34,892 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 07:56:34,892 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2628 transitions. [2021-06-05 07:56:34,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 07:56:34,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:34,893 INFO L521 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 07:56:34,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 07:56:34,894 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:34,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:34,894 INFO L82 PathProgramCache]: Analyzing trace with hash 129784312, now seen corresponding path program 3 times [2021-06-05 07:56:34,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:34,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635893837] [2021-06-05 07:56:34,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:34,974 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 07:56:34,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:34,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635893837] [2021-06-05 07:56:34,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635893837] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:56:34,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:56:34,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 07:56:34,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649199730] [2021-06-05 07:56:34,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 07:56:34,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:34,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 07:56:34,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:56:34,976 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 07:56:35,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:35,074 INFO L93 Difference]: Finished difference Result 2211 states and 5878 transitions. [2021-06-05 07:56:35,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 07:56:35,074 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 07:56:35,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:35,083 INFO L225 Difference]: With dead ends: 2211 [2021-06-05 07:56:35,084 INFO L226 Difference]: Without dead ends: 1944 [2021-06-05 07:56:35,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:56:35,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-06-05 07:56:35,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1127. [2021-06-05 07:56:35,128 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 07:56:35,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3119 transitions. [2021-06-05 07:56:35,131 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3119 transitions. Word has length 40 [2021-06-05 07:56:35,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:35,132 INFO L482 AbstractCegarLoop]: Abstraction has 1127 states and 3119 transitions. [2021-06-05 07:56:35,132 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 07:56:35,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3119 transitions. [2021-06-05 07:56:35,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 07:56:35,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:35,137 INFO L521 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 07:56:35,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 07:56:35,145 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:35,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:35,145 INFO L82 PathProgramCache]: Analyzing trace with hash 152127562, now seen corresponding path program 4 times [2021-06-05 07:56:35,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:35,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491421365] [2021-06-05 07:56:35,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:35,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:35,240 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 07:56:35,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:35,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491421365] [2021-06-05 07:56:35,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491421365] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:56:35,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:56:35,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 07:56:35,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688172010] [2021-06-05 07:56:35,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 07:56:35,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:35,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 07:56:35,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:56:35,243 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 07:56:35,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:35,377 INFO L93 Difference]: Finished difference Result 1671 states and 4527 transitions. [2021-06-05 07:56:35,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 07:56:35,377 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 07:56:35,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:35,384 INFO L225 Difference]: With dead ends: 1671 [2021-06-05 07:56:35,384 INFO L226 Difference]: Without dead ends: 1173 [2021-06-05 07:56:35,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 101.7ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:56:35,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-06-05 07:56:35,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 922. [2021-06-05 07:56:35,408 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 07:56:35,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 2517 transitions. [2021-06-05 07:56:35,411 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 2517 transitions. Word has length 40 [2021-06-05 07:56:35,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:35,411 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 2517 transitions. [2021-06-05 07:56:35,411 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 07:56:35,411 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 2517 transitions. [2021-06-05 07:56:35,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 07:56:35,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:35,414 INFO L521 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 07:56:35,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 07:56:35,414 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:35,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:35,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1301576209, now seen corresponding path program 1 times [2021-06-05 07:56:35,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:35,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739065515] [2021-06-05 07:56:35,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:35,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:35,488 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 07:56:35,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:35,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739065515] [2021-06-05 07:56:35,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739065515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:35,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606518279] [2021-06-05 07:56:35,489 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 07:56:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:35,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:56:35,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:35,868 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 07:56:35,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606518279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:35,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:35,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 07:56:35,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787889868] [2021-06-05 07:56:35,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:56:35,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:35,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:56:35,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:56:35,870 INFO L87 Difference]: Start difference. First operand 922 states and 2517 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 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 07:56:36,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:36,008 INFO L93 Difference]: Finished difference Result 1526 states and 4027 transitions. [2021-06-05 07:56:36,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 07:56:36,009 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 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 45 [2021-06-05 07:56:36,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:36,015 INFO L225 Difference]: With dead ends: 1526 [2021-06-05 07:56:36,015 INFO L226 Difference]: Without dead ends: 1256 [2021-06-05 07:56:36,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 123.1ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:56:36,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-06-05 07:56:36,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1113. [2021-06-05 07:56:36,047 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 07:56:36,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 3048 transitions. [2021-06-05 07:56:36,051 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 3048 transitions. Word has length 45 [2021-06-05 07:56:36,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:36,051 INFO L482 AbstractCegarLoop]: Abstraction has 1113 states and 3048 transitions. [2021-06-05 07:56:36,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 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 07:56:36,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 3048 transitions. [2021-06-05 07:56:36,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 07:56:36,053 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:36,053 INFO L521 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 07:56:36,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-05 07:56:36,277 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:36,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:36,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1689455029, now seen corresponding path program 2 times [2021-06-05 07:56:36,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:36,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956085412] [2021-06-05 07:56:36,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:36,344 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 07:56:36,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:36,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956085412] [2021-06-05 07:56:36,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956085412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:36,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867837206] [2021-06-05 07:56:36,345 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 07:56:36,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:56:36,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:36,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:56:36,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:36,564 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 07:56:36,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867837206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:36,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:36,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 07:56:36,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225997578] [2021-06-05 07:56:36,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:56:36,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:36,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:56:36,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:56:36,566 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 07:56:36,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:36,691 INFO L93 Difference]: Finished difference Result 2408 states and 6431 transitions. [2021-06-05 07:56:36,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 07:56:36,692 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 07:56:36,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:36,700 INFO L225 Difference]: With dead ends: 2408 [2021-06-05 07:56:36,701 INFO L226 Difference]: Without dead ends: 2138 [2021-06-05 07:56:36,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:56:36,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-06-05 07:56:36,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1293. [2021-06-05 07:56:36,736 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 07:56:36,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 3607 transitions. [2021-06-05 07:56:36,741 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 3607 transitions. Word has length 45 [2021-06-05 07:56:36,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:36,741 INFO L482 AbstractCegarLoop]: Abstraction has 1293 states and 3607 transitions. [2021-06-05 07:56:36,742 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 07:56:36,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 3607 transitions. [2021-06-05 07:56:36,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 07:56:36,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:36,743 INFO L521 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 07:56:36,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:36,967 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:36,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:36,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1711798279, now seen corresponding path program 3 times [2021-06-05 07:56:36,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:36,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062804036] [2021-06-05 07:56:36,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:36,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:37,028 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 07:56:37,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:37,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062804036] [2021-06-05 07:56:37,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062804036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:37,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319153732] [2021-06-05 07:56:37,029 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 07:56:37,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:56:37,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:37,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:56:37,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:37,221 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 07:56:37,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319153732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:37,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:37,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 07:56:37,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901835929] [2021-06-05 07:56:37,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:56:37,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:37,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:56:37,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:56:37,223 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 07:56:37,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:37,483 INFO L93 Difference]: Finished difference Result 2196 states and 5861 transitions. [2021-06-05 07:56:37,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:56:37,484 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 07:56:37,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:37,491 INFO L225 Difference]: With dead ends: 2196 [2021-06-05 07:56:37,491 INFO L226 Difference]: Without dead ends: 1621 [2021-06-05 07:56:37,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 210.9ms TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:56:37,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-06-05 07:56:37,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1328. [2021-06-05 07:56:37,521 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 07:56:37,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 3683 transitions. [2021-06-05 07:56:37,526 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 3683 transitions. Word has length 45 [2021-06-05 07:56:37,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:37,526 INFO L482 AbstractCegarLoop]: Abstraction has 1328 states and 3683 transitions. [2021-06-05 07:56:37,526 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 07:56:37,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 3683 transitions. [2021-06-05 07:56:37,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 07:56:37,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:37,528 INFO L521 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 07:56:37,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:37,752 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:37,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:37,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1229914011, now seen corresponding path program 1 times [2021-06-05 07:56:37,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:37,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113105146] [2021-06-05 07:56:37,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:37,846 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 07:56:37,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:37,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113105146] [2021-06-05 07:56:37,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113105146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:37,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241566240] [2021-06-05 07:56:37,847 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 07:56:37,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:37,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:56:37,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:38,036 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 07:56:38,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241566240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:38,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:38,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 07:56:38,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448300188] [2021-06-05 07:56:38,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:56:38,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:38,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:56:38,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:56:38,038 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 07:56:38,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:38,200 INFO L93 Difference]: Finished difference Result 2068 states and 5483 transitions. [2021-06-05 07:56:38,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 07:56:38,201 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 07:56:38,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:38,208 INFO L225 Difference]: With dead ends: 2068 [2021-06-05 07:56:38,208 INFO L226 Difference]: Without dead ends: 1734 [2021-06-05 07:56:38,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 136.9ms TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:56:38,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-06-05 07:56:38,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1413. [2021-06-05 07:56:38,238 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 07:56:38,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 3853 transitions. [2021-06-05 07:56:38,242 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 3853 transitions. Word has length 50 [2021-06-05 07:56:38,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:38,243 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 3853 transitions. [2021-06-05 07:56:38,243 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 07:56:38,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 3853 transitions. [2021-06-05 07:56:38,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 07:56:38,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:38,245 INFO L521 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 07:56:38,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:38,461 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:38,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:38,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1568318167, now seen corresponding path program 2 times [2021-06-05 07:56:38,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:38,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84444979] [2021-06-05 07:56:38,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:38,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:38,544 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 07:56:38,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:38,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84444979] [2021-06-05 07:56:38,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84444979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:38,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033859554] [2021-06-05 07:56:38,544 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 07:56:38,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:56:38,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:38,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:56:38,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:38,723 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 07:56:38,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033859554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:38,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:38,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 07:56:38,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026039448] [2021-06-05 07:56:38,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:56:38,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:38,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:56:38,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:56:38,726 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 07:56:38,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:38,831 INFO L93 Difference]: Finished difference Result 2061 states and 5277 transitions. [2021-06-05 07:56:38,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 07:56:38,831 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 07:56:38,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:38,856 INFO L225 Difference]: With dead ends: 2061 [2021-06-05 07:56:38,856 INFO L226 Difference]: Without dead ends: 1791 [2021-06-05 07:56:38,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:56:38,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2021-06-05 07:56:38,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 1428. [2021-06-05 07:56:38,892 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 07:56:38,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3883 transitions. [2021-06-05 07:56:38,898 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3883 transitions. Word has length 50 [2021-06-05 07:56:38,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:38,898 INFO L482 AbstractCegarLoop]: Abstraction has 1428 states and 3883 transitions. [2021-06-05 07:56:38,898 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 07:56:38,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3883 transitions. [2021-06-05 07:56:38,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 07:56:38,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:38,902 INFO L521 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 07:56:39,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 07:56:39,128 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:39,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:39,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1011406841, now seen corresponding path program 3 times [2021-06-05 07:56:39,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:39,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852418913] [2021-06-05 07:56:39,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:39,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:39,207 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 07:56:39,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:39,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852418913] [2021-06-05 07:56:39,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852418913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:39,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234251939] [2021-06-05 07:56:39,208 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 07:56:39,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:56:39,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:39,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:56:39,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:39,388 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 07:56:39,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234251939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:39,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:39,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 07:56:39,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947598866] [2021-06-05 07:56:39,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:56:39,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:39,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:56:39,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:56:39,391 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 07:56:39,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:39,568 INFO L93 Difference]: Finished difference Result 2006 states and 5197 transitions. [2021-06-05 07:56:39,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 07:56:39,569 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 07:56:39,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:39,573 INFO L225 Difference]: With dead ends: 2006 [2021-06-05 07:56:39,573 INFO L226 Difference]: Without dead ends: 1736 [2021-06-05 07:56:39,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 137.9ms TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:56:39,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2021-06-05 07:56:39,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1428. [2021-06-05 07:56:39,600 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 07:56:39,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3888 transitions. [2021-06-05 07:56:39,603 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3888 transitions. Word has length 50 [2021-06-05 07:56:39,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:39,604 INFO L482 AbstractCegarLoop]: Abstraction has 1428 states and 3888 transitions. [2021-06-05 07:56:39,604 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 07:56:39,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3888 transitions. [2021-06-05 07:56:39,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 07:56:39,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:39,606 INFO L521 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 07:56:39,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:39,821 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:39,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:39,821 INFO L82 PathProgramCache]: Analyzing trace with hash -21240761, now seen corresponding path program 4 times [2021-06-05 07:56:39,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:39,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174891549] [2021-06-05 07:56:39,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:39,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:39,881 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 07:56:39,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:39,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174891549] [2021-06-05 07:56:39,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174891549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:39,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825287381] [2021-06-05 07:56:39,882 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 07:56:39,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:56:39,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:39,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:56:39,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:40,011 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 07:56:40,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825287381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:40,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:40,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 07:56:40,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856185768] [2021-06-05 07:56:40,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:56:40,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:40,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:56:40,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:56:40,013 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 07:56:40,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:40,166 INFO L93 Difference]: Finished difference Result 2798 states and 7421 transitions. [2021-06-05 07:56:40,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:56:40,167 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 07:56:40,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:40,172 INFO L225 Difference]: With dead ends: 2798 [2021-06-05 07:56:40,172 INFO L226 Difference]: Without dead ends: 2528 [2021-06-05 07:56:40,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:56:40,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2021-06-05 07:56:40,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 1608. [2021-06-05 07:56:40,209 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 07:56:40,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 4447 transitions. [2021-06-05 07:56:40,214 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 4447 transitions. Word has length 50 [2021-06-05 07:56:40,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:40,214 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 4447 transitions. [2021-06-05 07:56:40,214 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 07:56:40,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 4447 transitions. [2021-06-05 07:56:40,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 07:56:40,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:40,217 INFO L521 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 07:56:40,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:40,433 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:40,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:40,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1102489, now seen corresponding path program 5 times [2021-06-05 07:56:40,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:40,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658582603] [2021-06-05 07:56:40,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:40,497 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 07:56:40,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:40,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658582603] [2021-06-05 07:56:40,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658582603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:40,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373297170] [2021-06-05 07:56:40,497 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 07:56:40,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:56:40,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:40,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:56:40,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:40,640 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 07:56:40,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373297170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:40,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:40,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 07:56:40,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433957430] [2021-06-05 07:56:40,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:56:40,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:40,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:56:40,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:56:40,642 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 07:56:40,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:40,858 INFO L93 Difference]: Finished difference Result 2285 states and 6121 transitions. [2021-06-05 07:56:40,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 07:56:40,859 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 07:56:40,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:40,861 INFO L225 Difference]: With dead ends: 2285 [2021-06-05 07:56:40,862 INFO L226 Difference]: Without dead ends: 1706 [2021-06-05 07:56:40,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 171.2ms TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:56:40,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2021-06-05 07:56:40,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1313. [2021-06-05 07:56:40,886 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 07:56:40,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 3578 transitions. [2021-06-05 07:56:40,890 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 3578 transitions. Word has length 50 [2021-06-05 07:56:40,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:40,890 INFO L482 AbstractCegarLoop]: Abstraction has 1313 states and 3578 transitions. [2021-06-05 07:56:40,890 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 07:56:40,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 3578 transitions. [2021-06-05 07:56:40,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 07:56:40,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:40,892 INFO L521 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 07:56:41,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 07:56:41,113 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:41,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:41,113 INFO L82 PathProgramCache]: Analyzing trace with hash 117785766, now seen corresponding path program 6 times [2021-06-05 07:56:41,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:41,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895736579] [2021-06-05 07:56:41,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:41,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:41,178 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 07:56:41,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:41,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895736579] [2021-06-05 07:56:41,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895736579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:41,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431014208] [2021-06-05 07:56:41,179 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 07:56:41,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:56:41,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:41,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:56:41,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:41,319 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 07:56:41,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431014208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:41,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:41,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 07:56:41,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580166089] [2021-06-05 07:56:41,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:56:41,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:41,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:56:41,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:56:41,321 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 07:56:41,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:41,469 INFO L93 Difference]: Finished difference Result 1931 states and 5017 transitions. [2021-06-05 07:56:41,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 07:56:41,470 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 07:56:41,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:41,472 INFO L225 Difference]: With dead ends: 1931 [2021-06-05 07:56:41,472 INFO L226 Difference]: Without dead ends: 1661 [2021-06-05 07:56:41,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:56:41,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-06-05 07:56:41,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1388. [2021-06-05 07:56:41,514 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 07:56:41,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 3803 transitions. [2021-06-05 07:56:41,518 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 3803 transitions. Word has length 55 [2021-06-05 07:56:41,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:41,518 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 3803 transitions. [2021-06-05 07:56:41,518 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 07:56:41,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 3803 transitions. [2021-06-05 07:56:41,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 07:56:41,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:41,521 INFO L521 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 07:56:41,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 07:56:41,737 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:41,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:41,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1597456522, now seen corresponding path program 7 times [2021-06-05 07:56:41,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:41,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810824409] [2021-06-05 07:56:41,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:41,837 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 07:56:41,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:41,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810824409] [2021-06-05 07:56:41,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810824409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:41,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374215998] [2021-06-05 07:56:41,838 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 07:56:41,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:41,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:56:41,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:42,022 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 07:56:42,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374215998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:42,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:42,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 07:56:42,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833107053] [2021-06-05 07:56:42,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:56:42,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:42,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:56:42,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:56:42,025 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 07:56:42,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:42,255 INFO L93 Difference]: Finished difference Result 2111 states and 5497 transitions. [2021-06-05 07:56:42,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:56:42,255 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 07:56:42,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:42,259 INFO L225 Difference]: With dead ends: 2111 [2021-06-05 07:56:42,259 INFO L226 Difference]: Without dead ends: 1841 [2021-06-05 07:56:42,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 193.5ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:56:42,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2021-06-05 07:56:42,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1463. [2021-06-05 07:56:42,284 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 07:56:42,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 4048 transitions. [2021-06-05 07:56:42,288 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 4048 transitions. Word has length 55 [2021-06-05 07:56:42,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:42,288 INFO L482 AbstractCegarLoop]: Abstraction has 1463 states and 4048 transitions. [2021-06-05 07:56:42,288 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 07:56:42,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 4048 transitions. [2021-06-05 07:56:42,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 07:56:42,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:42,291 INFO L521 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 07:56:42,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 07:56:42,505 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:42,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:42,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1664863172, now seen corresponding path program 8 times [2021-06-05 07:56:42,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:42,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042348235] [2021-06-05 07:56:42,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:42,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:42,577 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 07:56:42,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:42,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042348235] [2021-06-05 07:56:42,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042348235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:42,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853473972] [2021-06-05 07:56:42,578 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 07:56:42,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:56:42,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:42,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:56:42,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:42,742 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 07:56:42,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853473972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:42,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:42,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 07:56:42,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273005251] [2021-06-05 07:56:42,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:56:42,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:42,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:56:42,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:56:42,743 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 07:56:42,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:42,953 INFO L93 Difference]: Finished difference Result 2858 states and 7631 transitions. [2021-06-05 07:56:42,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:56:42,953 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 07:56:42,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:42,959 INFO L225 Difference]: With dead ends: 2858 [2021-06-05 07:56:42,959 INFO L226 Difference]: Without dead ends: 2588 [2021-06-05 07:56:42,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 153.2ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:56:42,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-06-05 07:56:42,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 1643. [2021-06-05 07:56:42,993 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 07:56:42,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 4607 transitions. [2021-06-05 07:56:42,997 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 4607 transitions. Word has length 55 [2021-06-05 07:56:42,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:42,997 INFO L482 AbstractCegarLoop]: Abstraction has 1643 states and 4607 transitions. [2021-06-05 07:56:42,997 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 07:56:42,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 4607 transitions. [2021-06-05 07:56:42,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 07:56:42,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:42,999 INFO L521 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 07:56:43,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 07:56:43,225 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:43,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:43,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1687206422, now seen corresponding path program 9 times [2021-06-05 07:56:43,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:43,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617803817] [2021-06-05 07:56:43,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:43,293 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 07:56:43,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:43,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617803817] [2021-06-05 07:56:43,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617803817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:43,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161100395] [2021-06-05 07:56:43,293 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 07:56:43,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:56:43,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:43,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:56:43,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:43,481 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 07:56:43,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161100395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:43,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:43,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 07:56:43,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807779045] [2021-06-05 07:56:43,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:56:43,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:43,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:56:43,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:56:43,483 INFO L87 Difference]: Start difference. First operand 1643 states and 4607 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 07:56:43,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:43,763 INFO L93 Difference]: Finished difference Result 2320 states and 6281 transitions. [2021-06-05 07:56:43,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:56:43,764 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 07:56:43,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:43,768 INFO L225 Difference]: With dead ends: 2320 [2021-06-05 07:56:43,768 INFO L226 Difference]: Without dead ends: 1831 [2021-06-05 07:56:43,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 208.9ms TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:56:43,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2021-06-05 07:56:43,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1234. [2021-06-05 07:56:43,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1233 states have (on average 2.72992700729927) internal successors, (3366), 1233 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:56:43,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 3366 transitions. [2021-06-05 07:56:43,795 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 3366 transitions. Word has length 55 [2021-06-05 07:56:43,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:43,795 INFO L482 AbstractCegarLoop]: Abstraction has 1234 states and 3366 transitions. [2021-06-05 07:56:43,795 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 07:56:43,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 3366 transitions. [2021-06-05 07:56:43,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 07:56:43,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:43,797 INFO L521 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 07:56:44,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 07:56:44,022 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:44,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:44,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1642632502, now seen corresponding path program 10 times [2021-06-05 07:56:44,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:44,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768455192] [2021-06-05 07:56:44,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:44,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:44,130 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 07:56:44,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:44,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768455192] [2021-06-05 07:56:44,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768455192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:44,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452026522] [2021-06-05 07:56:44,131 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 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 07:56:44,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:56:44,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:44,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:56:44,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:44,332 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 07:56:44,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452026522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:44,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:44,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-05 07:56:44,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408662300] [2021-06-05 07:56:44,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:56:44,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:44,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:56:44,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:56:44,334 INFO L87 Difference]: Start difference. First operand 1234 states and 3366 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 07:56:44,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:44,555 INFO L93 Difference]: Finished difference Result 2024 states and 5266 transitions. [2021-06-05 07:56:44,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:56:44,555 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 07:56:44,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:44,558 INFO L225 Difference]: With dead ends: 2024 [2021-06-05 07:56:44,559 INFO L226 Difference]: Without dead ends: 1690 [2021-06-05 07:56:44,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 202.0ms TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:56:44,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2021-06-05 07:56:44,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1319. [2021-06-05 07:56:44,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1319 states, 1318 states have (on average 2.6828528072837634) internal successors, (3536), 1318 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:56:44,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 3536 transitions. [2021-06-05 07:56:44,584 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 3536 transitions. Word has length 60 [2021-06-05 07:56:44,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:44,584 INFO L482 AbstractCegarLoop]: Abstraction has 1319 states and 3536 transitions. [2021-06-05 07:56:44,584 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 07:56:44,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 3536 transitions. [2021-06-05 07:56:44,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 07:56:44,586 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:44,586 INFO L521 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 07:56:44,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:44,801 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:44,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:44,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1005400838, now seen corresponding path program 11 times [2021-06-05 07:56:44,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:44,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081917845] [2021-06-05 07:56:44,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:44,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:44,879 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 07:56:44,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:44,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081917845] [2021-06-05 07:56:44,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081917845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:44,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891764003] [2021-06-05 07:56:44,879 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 07:56:44,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:56:44,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:44,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:56:44,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:45,044 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 07:56:45,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891764003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:45,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:45,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 07:56:45,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027434055] [2021-06-05 07:56:45,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:56:45,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:45,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:56:45,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:56:45,046 INFO L87 Difference]: Start difference. First operand 1319 states and 3536 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 07:56:45,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:45,211 INFO L93 Difference]: Finished difference Result 2246 states and 5647 transitions. [2021-06-05 07:56:45,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 07:56:45,211 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 07:56:45,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:45,215 INFO L225 Difference]: With dead ends: 2246 [2021-06-05 07:56:45,215 INFO L226 Difference]: Without dead ends: 1976 [2021-06-05 07:56:45,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 123.8ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:56:45,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2021-06-05 07:56:45,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1463. [2021-06-05 07:56:45,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1462 states have (on average 2.7038303693570453) internal successors, (3953), 1462 states have internal predecessors, (3953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:56:45,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 3953 transitions. [2021-06-05 07:56:45,244 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 3953 transitions. Word has length 60 [2021-06-05 07:56:45,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:45,244 INFO L482 AbstractCegarLoop]: Abstraction has 1463 states and 3953 transitions. [2021-06-05 07:56:45,244 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 07:56:45,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 3953 transitions. [2021-06-05 07:56:45,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 07:56:45,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:45,248 INFO L521 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 07:56:45,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:45,465 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:45,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:45,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1024918474, now seen corresponding path program 12 times [2021-06-05 07:56:45,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:45,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674405828] [2021-06-05 07:56:45,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:45,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:45,567 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 07:56:45,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:45,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674405828] [2021-06-05 07:56:45,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674405828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:45,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793119959] [2021-06-05 07:56:45,568 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 07:56:45,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:56:45,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:45,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:56:45,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:45,733 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 07:56:45,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793119959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:45,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:45,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 07:56:45,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230211498] [2021-06-05 07:56:45,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:56:45,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:45,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:56:45,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:56:45,735 INFO L87 Difference]: Start difference. First operand 1463 states and 3953 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 07:56:45,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:45,964 INFO L93 Difference]: Finished difference Result 2206 states and 5642 transitions. [2021-06-05 07:56:45,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:56:45,964 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 07:56:45,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:45,968 INFO L225 Difference]: With dead ends: 2206 [2021-06-05 07:56:45,968 INFO L226 Difference]: Without dead ends: 1936 [2021-06-05 07:56:45,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 204.5ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:56:45,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-06-05 07:56:45,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1538. [2021-06-05 07:56:45,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 2.718282368249837) internal successors, (4178), 1537 states have internal predecessors, (4178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:56:45,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 4178 transitions. [2021-06-05 07:56:45,993 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 4178 transitions. Word has length 60 [2021-06-05 07:56:45,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:45,993 INFO L482 AbstractCegarLoop]: Abstraction has 1538 states and 4178 transitions. [2021-06-05 07:56:45,993 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 07:56:45,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 4178 transitions. [2021-06-05 07:56:45,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 07:56:45,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:45,996 INFO L521 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 07:56:46,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 07:56:46,220 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:46,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:46,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1639157944, now seen corresponding path program 13 times [2021-06-05 07:56:46,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:46,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114844258] [2021-06-05 07:56:46,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:46,302 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 07:56:46,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:46,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114844258] [2021-06-05 07:56:46,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114844258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:46,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980196349] [2021-06-05 07:56:46,302 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 07:56:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:46,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:56:46,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:46,446 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 07:56:46,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980196349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:46,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:46,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 07:56:46,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193385203] [2021-06-05 07:56:46,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:56:46,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:46,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:56:46,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:56:46,447 INFO L87 Difference]: Start difference. First operand 1538 states and 4178 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 07:56:46,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:46,624 INFO L93 Difference]: Finished difference Result 2256 states and 5817 transitions. [2021-06-05 07:56:46,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 07:56:46,629 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 07:56:46,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:46,635 INFO L225 Difference]: With dead ends: 2256 [2021-06-05 07:56:46,635 INFO L226 Difference]: Without dead ends: 1986 [2021-06-05 07:56:46,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 150.6ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:56:46,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2021-06-05 07:56:46,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1613. [2021-06-05 07:56:46,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1612 states have (on average 2.7313895781637716) internal successors, (4403), 1612 states have internal predecessors, (4403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:56:46,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 4403 transitions. [2021-06-05 07:56:46,664 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 4403 transitions. Word has length 60 [2021-06-05 07:56:46,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:46,665 INFO L482 AbstractCegarLoop]: Abstraction has 1613 states and 4403 transitions. [2021-06-05 07:56:46,665 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 07:56:46,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 4403 transitions. [2021-06-05 07:56:46,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 07:56:46,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:46,667 INFO L521 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 07:56:46,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:46,891 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:46,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:46,892 INFO L82 PathProgramCache]: Analyzing trace with hash -76084344, now seen corresponding path program 14 times [2021-06-05 07:56:46,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:46,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95455113] [2021-06-05 07:56:46,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:46,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:46,965 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 07:56:46,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:46,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95455113] [2021-06-05 07:56:46,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95455113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:46,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823784346] [2021-06-05 07:56:46,965 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 07:56:47,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:56:47,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:47,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:56:47,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:47,137 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 07:56:47,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823784346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:47,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:47,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 07:56:47,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719051258] [2021-06-05 07:56:47,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:56:47,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:47,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:56:47,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:56:47,139 INFO L87 Difference]: Start difference. First operand 1613 states and 4403 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 07:56:47,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:47,414 INFO L93 Difference]: Finished difference Result 2341 states and 6107 transitions. [2021-06-05 07:56:47,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:56:47,414 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 07:56:47,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:47,417 INFO L225 Difference]: With dead ends: 2341 [2021-06-05 07:56:47,417 INFO L226 Difference]: Without dead ends: 2071 [2021-06-05 07:56:47,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 227.5ms TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:56:47,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-06-05 07:56:47,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1688. [2021-06-05 07:56:47,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1688 states, 1687 states have (on average 2.7551867219917012) internal successors, (4648), 1687 states have internal predecessors, (4648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:56:47,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 4648 transitions. [2021-06-05 07:56:47,446 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 4648 transitions. Word has length 60 [2021-06-05 07:56:47,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:47,447 INFO L482 AbstractCegarLoop]: Abstraction has 1688 states and 4648 transitions. [2021-06-05 07:56:47,447 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 07:56:47,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 4648 transitions. [2021-06-05 07:56:47,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 07:56:47,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:47,449 INFO L521 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 07:56:47,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 07:56:47,665 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:47,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:47,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1108731946, now seen corresponding path program 15 times [2021-06-05 07:56:47,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:47,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535452852] [2021-06-05 07:56:47,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:47,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:47,730 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 07:56:47,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:47,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535452852] [2021-06-05 07:56:47,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535452852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:47,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142406727] [2021-06-05 07:56:47,731 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 07:56:47,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:56:47,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:47,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:56:47,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:47,882 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 07:56:47,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142406727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:47,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:47,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 07:56:47,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074063801] [2021-06-05 07:56:47,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:56:47,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:47,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:56:47,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:56:47,884 INFO L87 Difference]: Start difference. First operand 1688 states and 4648 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 07:56:48,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:48,100 INFO L93 Difference]: Finished difference Result 3108 states and 8281 transitions. [2021-06-05 07:56:48,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:56:48,100 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 07:56:48,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:48,105 INFO L225 Difference]: With dead ends: 3108 [2021-06-05 07:56:48,105 INFO L226 Difference]: Without dead ends: 2838 [2021-06-05 07:56:48,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 164.4ms TimeCoverageRelationStatistics Valid=164, Invalid=436, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:56:48,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2838 states. [2021-06-05 07:56:48,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2838 to 1868. [2021-06-05 07:56:48,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 2.78896625602571) internal successors, (5207), 1867 states have internal predecessors, (5207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:56:48,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 5207 transitions. [2021-06-05 07:56:48,144 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 5207 transitions. Word has length 60 [2021-06-05 07:56:48,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:48,144 INFO L482 AbstractCegarLoop]: Abstraction has 1868 states and 5207 transitions. [2021-06-05 07:56:48,144 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 07:56:48,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 5207 transitions. [2021-06-05 07:56:48,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 07:56:48,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:48,147 INFO L521 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 07:56:48,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 07:56:48,361 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:48,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:48,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1086388696, now seen corresponding path program 16 times [2021-06-05 07:56:48,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:48,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914103593] [2021-06-05 07:56:48,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:48,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:48,431 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 07:56:48,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:48,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914103593] [2021-06-05 07:56:48,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914103593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:48,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631795772] [2021-06-05 07:56:48,431 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 07:56:48,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:56:48,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:48,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:56:48,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:48,587 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 07:56:48,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631795772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:48,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:48,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 07:56:48,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767268209] [2021-06-05 07:56:48,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:56:48,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:48,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:56:48,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:56:48,588 INFO L87 Difference]: Start difference. First operand 1868 states and 5207 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 07:56:48,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:48,892 INFO L93 Difference]: Finished difference Result 2595 states and 6981 transitions. [2021-06-05 07:56:48,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:56:48,893 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 07:56:48,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:48,896 INFO L225 Difference]: With dead ends: 2595 [2021-06-05 07:56:48,896 INFO L226 Difference]: Without dead ends: 2106 [2021-06-05 07:56:48,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 254.1ms TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:56:48,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-06-05 07:56:48,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 1513. [2021-06-05 07:56:48,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1512 states have (on average 2.7301587301587302) internal successors, (4128), 1512 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:56:48,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 4128 transitions. [2021-06-05 07:56:48,921 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 4128 transitions. Word has length 60 [2021-06-05 07:56:48,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:48,922 INFO L482 AbstractCegarLoop]: Abstraction has 1513 states and 4128 transitions. [2021-06-05 07:56:48,922 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 07:56:48,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 4128 transitions. [2021-06-05 07:56:48,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 07:56:48,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:48,925 INFO L521 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 07:56:49,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 07:56:49,149 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:49,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:49,149 INFO L82 PathProgramCache]: Analyzing trace with hash -423019465, now seen corresponding path program 17 times [2021-06-05 07:56:49,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:49,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522935536] [2021-06-05 07:56:49,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:49,237 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 07:56:49,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:49,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522935536] [2021-06-05 07:56:49,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522935536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:49,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589546537] [2021-06-05 07:56:49,237 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 07:56:49,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:56:49,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:49,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:56:49,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:49,389 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 07:56:49,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589546537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:49,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:49,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 07:56:49,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744468748] [2021-06-05 07:56:49,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:56:49,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:49,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:56:49,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:56:49,392 INFO L87 Difference]: Start difference. First operand 1513 states and 4128 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 07:56:49,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:49,597 INFO L93 Difference]: Finished difference Result 2231 states and 5767 transitions. [2021-06-05 07:56:49,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:56:49,598 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 07:56:49,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:49,600 INFO L225 Difference]: With dead ends: 2231 [2021-06-05 07:56:49,601 INFO L226 Difference]: Without dead ends: 1961 [2021-06-05 07:56:49,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 172.9ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:56:49,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-06-05 07:56:49,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1588. [2021-06-05 07:56:49,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1587 states have (on average 2.742911153119093) internal successors, (4353), 1587 states have internal predecessors, (4353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:56:49,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 4353 transitions. [2021-06-05 07:56:49,631 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 4353 transitions. Word has length 65 [2021-06-05 07:56:49,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:49,631 INFO L482 AbstractCegarLoop]: Abstraction has 1588 states and 4353 transitions. [2021-06-05 07:56:49,631 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 07:56:49,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 4353 transitions. [2021-06-05 07:56:49,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 07:56:49,633 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:49,633 INFO L521 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 07:56:49,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 07:56:49,849 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:49,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:49,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1607299847, now seen corresponding path program 18 times [2021-06-05 07:56:49,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:49,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169018994] [2021-06-05 07:56:49,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:49,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:49,940 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 07:56:49,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:49,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169018994] [2021-06-05 07:56:49,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169018994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:49,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116158276] [2021-06-05 07:56:49,940 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 07:56:49,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:56:49,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:49,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:56:49,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:50,116 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 07:56:50,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116158276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:50,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:50,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 07:56:50,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71624141] [2021-06-05 07:56:50,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:56:50,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:50,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:56:50,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:56:50,117 INFO L87 Difference]: Start difference. First operand 1588 states and 4353 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 07:56:50,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:50,361 INFO L93 Difference]: Finished difference Result 2401 states and 6182 transitions. [2021-06-05 07:56:50,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:56:50,361 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 07:56:50,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:50,365 INFO L225 Difference]: With dead ends: 2401 [2021-06-05 07:56:50,365 INFO L226 Difference]: Without dead ends: 2131 [2021-06-05 07:56:50,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 221.4ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:56:50,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2021-06-05 07:56:50,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 1663. [2021-06-05 07:56:50,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 2.7545126353790614) internal successors, (4578), 1662 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:56:50,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 4578 transitions. [2021-06-05 07:56:50,401 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 4578 transitions. Word has length 65 [2021-06-05 07:56:50,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:50,401 INFO L482 AbstractCegarLoop]: Abstraction has 1663 states and 4578 transitions. [2021-06-05 07:56:50,401 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 07:56:50,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 4578 transitions. [2021-06-05 07:56:50,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 07:56:50,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:50,404 INFO L521 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 07:56:50,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 07:56:50,625 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:50,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:50,625 INFO L82 PathProgramCache]: Analyzing trace with hash -2073427979, now seen corresponding path program 19 times [2021-06-05 07:56:50,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:50,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845123678] [2021-06-05 07:56:50,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:50,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:50,727 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 07:56:50,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:50,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845123678] [2021-06-05 07:56:50,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845123678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:50,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402122401] [2021-06-05 07:56:50,728 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 07:56:50,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:50,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:56:50,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:50,894 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 07:56:50,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402122401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:50,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:50,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 07:56:50,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423289536] [2021-06-05 07:56:50,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:56:50,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:50,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:56:50,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:56:50,896 INFO L87 Difference]: Start difference. First operand 1663 states and 4578 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 07:56:51,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:51,128 INFO L93 Difference]: Finished difference Result 2431 states and 6317 transitions. [2021-06-05 07:56:51,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:56:51,129 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 07:56:51,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:51,132 INFO L225 Difference]: With dead ends: 2431 [2021-06-05 07:56:51,132 INFO L226 Difference]: Without dead ends: 2161 [2021-06-05 07:56:51,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 204.7ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:56:51,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2021-06-05 07:56:51,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 1738. [2021-06-05 07:56:51,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1737 states have (on average 2.765112262521589) internal successors, (4803), 1737 states have internal predecessors, (4803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:56:51,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 4803 transitions. [2021-06-05 07:56:51,161 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 4803 transitions. Word has length 65 [2021-06-05 07:56:51,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:51,162 INFO L482 AbstractCegarLoop]: Abstraction has 1738 states and 4803 transitions. [2021-06-05 07:56:51,162 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 07:56:51,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 4803 transitions. [2021-06-05 07:56:51,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 07:56:51,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:51,164 INFO L521 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 07:56:51,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:51,389 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:51,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:51,390 INFO L82 PathProgramCache]: Analyzing trace with hash 506297029, now seen corresponding path program 20 times [2021-06-05 07:56:51,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:51,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509182218] [2021-06-05 07:56:51,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:51,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:51,471 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 07:56:51,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:51,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509182218] [2021-06-05 07:56:51,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509182218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:51,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396974123] [2021-06-05 07:56:51,472 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 07:56:51,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:56:51,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:51,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:56:51,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:51,660 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 07:56:51,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396974123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:51,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:51,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 07:56:51,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746192427] [2021-06-05 07:56:51,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:56:51,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:51,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:56:51,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:56:51,661 INFO L87 Difference]: Start difference. First operand 1738 states and 4803 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 07:56:51,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:51,969 INFO L93 Difference]: Finished difference Result 2516 states and 6607 transitions. [2021-06-05 07:56:51,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:56:51,969 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 07:56:51,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:51,972 INFO L225 Difference]: With dead ends: 2516 [2021-06-05 07:56:51,972 INFO L226 Difference]: Without dead ends: 2246 [2021-06-05 07:56:51,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 253.0ms TimeCoverageRelationStatistics Valid=218, Invalid=652, Unknown=0, NotChecked=0, Total=870 [2021-06-05 07:56:51,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2021-06-05 07:56:51,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 1813. [2021-06-05 07:56:51,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 2.7858719646799117) internal successors, (5048), 1812 states have internal predecessors, (5048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:56:51,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 5048 transitions. [2021-06-05 07:56:51,998 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 5048 transitions. Word has length 65 [2021-06-05 07:56:51,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:51,998 INFO L482 AbstractCegarLoop]: Abstraction has 1813 states and 5048 transitions. [2021-06-05 07:56:51,998 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 07:56:51,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 5048 transitions. [2021-06-05 07:56:52,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 07:56:52,000 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:52,001 INFO L521 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 07:56:52,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 07:56:52,223 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:52,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:52,224 INFO L82 PathProgramCache]: Analyzing trace with hash -526350573, now seen corresponding path program 21 times [2021-06-05 07:56:52,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:52,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329761606] [2021-06-05 07:56:52,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:52,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:52,295 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 07:56:52,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:52,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329761606] [2021-06-05 07:56:52,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329761606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:52,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654894792] [2021-06-05 07:56:52,295 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 07:56:52,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:56:52,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:52,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:56:52,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:52,481 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 07:56:52,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654894792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:52,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:52,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 07:56:52,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215395118] [2021-06-05 07:56:52,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:56:52,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:52,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:56:52,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:56:52,484 INFO L87 Difference]: Start difference. First operand 1813 states and 5048 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 07:56:52,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:52,739 INFO L93 Difference]: Finished difference Result 3258 states and 8731 transitions. [2021-06-05 07:56:52,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:56:52,739 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 07:56:52,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:52,742 INFO L225 Difference]: With dead ends: 3258 [2021-06-05 07:56:52,742 INFO L226 Difference]: Without dead ends: 2988 [2021-06-05 07:56:52,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 215.4ms TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2021-06-05 07:56:52,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2988 states. [2021-06-05 07:56:52,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2988 to 1993. [2021-06-05 07:56:52,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1993 states, 1992 states have (on average 2.8147590361445785) internal successors, (5607), 1992 states have internal predecessors, (5607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:56:52,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1993 states to 1993 states and 5607 transitions. [2021-06-05 07:56:52,776 INFO L78 Accepts]: Start accepts. Automaton has 1993 states and 5607 transitions. Word has length 65 [2021-06-05 07:56:52,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:52,777 INFO L482 AbstractCegarLoop]: Abstraction has 1993 states and 5607 transitions. [2021-06-05 07:56:52,777 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 07:56:52,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1993 states and 5607 transitions. [2021-06-05 07:56:52,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 07:56:52,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:52,779 INFO L521 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 07:56:53,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:53,000 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:53,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:53,000 INFO L82 PathProgramCache]: Analyzing trace with hash -504007323, now seen corresponding path program 22 times [2021-06-05 07:56:53,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:53,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142711444] [2021-06-05 07:56:53,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:53,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:53,083 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 07:56:53,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:53,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142711444] [2021-06-05 07:56:53,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142711444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:53,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214461824] [2021-06-05 07:56:53,084 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 07:56:53,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:56:53,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:53,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:56:53,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:53,221 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 07:56:53,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214461824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:53,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:53,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 07:56:53,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603575089] [2021-06-05 07:56:53,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:56:53,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:53,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:56:53,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:56:53,223 INFO L87 Difference]: Start difference. First operand 1993 states and 5607 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 07:56:53,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:53,522 INFO L93 Difference]: Finished difference Result 2720 states and 7381 transitions. [2021-06-05 07:56:53,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:56:53,522 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 07:56:53,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:53,525 INFO L225 Difference]: With dead ends: 2720 [2021-06-05 07:56:53,525 INFO L226 Difference]: Without dead ends: 2231 [2021-06-05 07:56:53,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 263.4ms TimeCoverageRelationStatistics Valid=256, Invalid=674, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:56:53,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2021-06-05 07:56:53,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 1434. [2021-06-05 07:56:53,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1433 states have (on average 2.732728541521284) internal successors, (3916), 1433 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:56:53,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 3916 transitions. [2021-06-05 07:56:53,546 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 3916 transitions. Word has length 65 [2021-06-05 07:56:53,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:53,546 INFO L482 AbstractCegarLoop]: Abstraction has 1434 states and 3916 transitions. [2021-06-05 07:56:53,546 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 07:56:53,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 3916 transitions. [2021-06-05 07:56:53,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 07:56:53,548 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:53,548 INFO L521 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 07:56:53,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 07:56:53,770 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:53,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:53,770 INFO L82 PathProgramCache]: Analyzing trace with hash 2053970119, now seen corresponding path program 23 times [2021-06-05 07:56:53,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:53,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552307521] [2021-06-05 07:56:53,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:53,874 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 07:56:53,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:53,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552307521] [2021-06-05 07:56:53,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552307521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:53,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55342663] [2021-06-05 07:56:53,875 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 07:56:53,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 07:56:53,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:53,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:56:53,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:54,070 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 07:56:54,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55342663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:54,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:54,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2021-06-05 07:56:54,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840439486] [2021-06-05 07:56:54,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:56:54,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:54,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:56:54,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:56:54,072 INFO L87 Difference]: Start difference. First operand 1434 states and 3916 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 07:56:54,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:54,313 INFO L93 Difference]: Finished difference Result 2274 states and 5916 transitions. [2021-06-05 07:56:54,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:56:54,314 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 07:56:54,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:54,316 INFO L225 Difference]: With dead ends: 2274 [2021-06-05 07:56:54,316 INFO L226 Difference]: Without dead ends: 1940 [2021-06-05 07:56:54,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 249.2ms TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:56:54,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-06-05 07:56:54,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1519. [2021-06-05 07:56:54,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 2.691699604743083) internal successors, (4086), 1518 states have internal predecessors, (4086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:56:54,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 4086 transitions. [2021-06-05 07:56:54,338 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 4086 transitions. Word has length 70 [2021-06-05 07:56:54,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:54,338 INFO L482 AbstractCegarLoop]: Abstraction has 1519 states and 4086 transitions. [2021-06-05 07:56:54,338 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 07:56:54,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 4086 transitions. [2021-06-05 07:56:54,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 07:56:54,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:54,340 INFO L521 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 07:56:54,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:54,540 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:54,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:54,541 INFO L82 PathProgramCache]: Analyzing trace with hash -778605685, now seen corresponding path program 24 times [2021-06-05 07:56:54,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:54,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113619526] [2021-06-05 07:56:54,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:54,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:54,631 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 07:56:54,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:54,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113619526] [2021-06-05 07:56:54,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113619526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:54,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883840206] [2021-06-05 07:56:54,631 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 07:56:54,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:56:54,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:54,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 07:56:54,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:54,828 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 07:56:54,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883840206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:54,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:54,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 07:56:54,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531706268] [2021-06-05 07:56:54,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:56:54,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:54,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:56:54,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:56:54,829 INFO L87 Difference]: Start difference. First operand 1519 states and 4086 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 07:56:54,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:54,988 INFO L93 Difference]: Finished difference Result 2596 states and 6497 transitions. [2021-06-05 07:56:54,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 07:56:54,988 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 07:56:54,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:54,991 INFO L225 Difference]: With dead ends: 2596 [2021-06-05 07:56:54,991 INFO L226 Difference]: Without dead ends: 2326 [2021-06-05 07:56:54,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 153.7ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:56:54,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2326 states. [2021-06-05 07:56:55,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2326 to 1663. [2021-06-05 07:56:55,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 2.7093862815884475) internal successors, (4503), 1662 states have internal predecessors, (4503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:56:55,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 4503 transitions. [2021-06-05 07:56:55,018 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 4503 transitions. Word has length 70 [2021-06-05 07:56:55,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:55,018 INFO L482 AbstractCegarLoop]: Abstraction has 1663 states and 4503 transitions. [2021-06-05 07:56:55,018 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 07:56:55,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 4503 transitions. [2021-06-05 07:56:55,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 07:56:55,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:55,020 INFO L521 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 07:56:55,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 07:56:55,242 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:55,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:55,243 INFO L82 PathProgramCache]: Analyzing trace with hash 220290651, now seen corresponding path program 25 times [2021-06-05 07:56:55,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:55,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519075276] [2021-06-05 07:56:55,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:55,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:55,354 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 07:56:55,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:55,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519075276] [2021-06-05 07:56:55,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519075276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:55,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103607959] [2021-06-05 07:56:55,354 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 07:56:55,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:55,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 07:56:55,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:55,529 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 07:56:55,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103607959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:55,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:55,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 07:56:55,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955252288] [2021-06-05 07:56:55,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:56:55,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:55,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:56:55,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:56:55,531 INFO L87 Difference]: Start difference. First operand 1663 states and 4503 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 07:56:55,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:55,783 INFO L93 Difference]: Finished difference Result 2556 states and 6492 transitions. [2021-06-05 07:56:55,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:56:55,784 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 07:56:55,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:55,786 INFO L225 Difference]: With dead ends: 2556 [2021-06-05 07:56:55,786 INFO L226 Difference]: Without dead ends: 2286 [2021-06-05 07:56:55,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 241.8ms TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:56:55,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2021-06-05 07:56:55,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 1738. [2021-06-05 07:56:55,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1737 states have (on average 2.7219343696027636) internal successors, (4728), 1737 states have internal predecessors, (4728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:56:55,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 4728 transitions. [2021-06-05 07:56:55,812 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 4728 transitions. Word has length 70 [2021-06-05 07:56:55,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:55,812 INFO L482 AbstractCegarLoop]: Abstraction has 1738 states and 4728 transitions. [2021-06-05 07:56:55,813 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 07:56:55,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 4728 transitions. [2021-06-05 07:56:55,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 07:56:55,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:55,815 INFO L521 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 07:56:56,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:56,032 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:56,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:56,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1659037239, now seen corresponding path program 26 times [2021-06-05 07:56:56,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:56,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412067474] [2021-06-05 07:56:56,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:56,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:56,141 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 07:56:56,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:56,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412067474] [2021-06-05 07:56:56,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412067474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:56,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674889777] [2021-06-05 07:56:56,141 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 07:56:56,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:56:56,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:56,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 07:56:56,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:56,342 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 07:56:56,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674889777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:56,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:56,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 07:56:56,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024046143] [2021-06-05 07:56:56,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:56:56,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:56,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:56:56,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:56:56,343 INFO L87 Difference]: Start difference. First operand 1738 states and 4728 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 07:56:56,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:56,534 INFO L93 Difference]: Finished difference Result 2606 states and 6667 transitions. [2021-06-05 07:56:56,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:56:56,534 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 07:56:56,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:56,537 INFO L225 Difference]: With dead ends: 2606 [2021-06-05 07:56:56,537 INFO L226 Difference]: Without dead ends: 2336 [2021-06-05 07:56:56,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 199.7ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:56:56,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-06-05 07:56:56,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 1813. [2021-06-05 07:56:56,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 2.7334437086092715) internal successors, (4953), 1812 states have internal predecessors, (4953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:56:56,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 4953 transitions. [2021-06-05 07:56:56,565 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 4953 transitions. Word has length 70 [2021-06-05 07:56:56,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:56,565 INFO L482 AbstractCegarLoop]: Abstraction has 1813 states and 4953 transitions. [2021-06-05 07:56:56,565 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 07:56:56,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 4953 transitions. [2021-06-05 07:56:56,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 07:56:56,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:56,568 INFO L521 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 07:56:56,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 07:56:56,791 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:56,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:56,791 INFO L82 PathProgramCache]: Analyzing trace with hash 371282073, now seen corresponding path program 27 times [2021-06-05 07:56:56,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:56,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532407227] [2021-06-05 07:56:56,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:56,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:56,887 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 07:56:56,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:56,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532407227] [2021-06-05 07:56:56,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532407227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:56,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127779234] [2021-06-05 07:56:56,887 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 07:56:56,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 07:56:56,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:56,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 07:56:56,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:57,054 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 07:56:57,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127779234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:57,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:57,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 07:56:57,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211785343] [2021-06-05 07:56:57,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:56:57,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:57,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:56:57,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:56:57,056 INFO L87 Difference]: Start difference. First operand 1813 states and 4953 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 07:56:57,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:57,349 INFO L93 Difference]: Finished difference Result 2631 states and 6792 transitions. [2021-06-05 07:56:57,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:56:57,350 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 07:56:57,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:57,353 INFO L225 Difference]: With dead ends: 2631 [2021-06-05 07:56:57,353 INFO L226 Difference]: Without dead ends: 2361 [2021-06-05 07:56:57,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 254.8ms TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:56:57,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-06-05 07:56:57,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 1888. [2021-06-05 07:56:57,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1887 states have (on average 2.7440381558028615) internal successors, (5178), 1887 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:56:57,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 5178 transitions. [2021-06-05 07:56:57,384 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 5178 transitions. Word has length 70 [2021-06-05 07:56:57,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:57,385 INFO L482 AbstractCegarLoop]: Abstraction has 1888 states and 5178 transitions. [2021-06-05 07:56:57,385 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 07:56:57,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 5178 transitions. [2021-06-05 07:56:57,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 07:56:57,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:57,388 INFO L521 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 07:56:57,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:57,611 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:57,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:57,611 INFO L82 PathProgramCache]: Analyzing trace with hash 985521543, now seen corresponding path program 28 times [2021-06-05 07:56:57,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:57,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589897249] [2021-06-05 07:56:57,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:57,695 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 07:56:57,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:57,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589897249] [2021-06-05 07:56:57,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589897249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:57,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899600707] [2021-06-05 07:56:57,696 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 07:56:57,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:56:57,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:57,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 07:56:57,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:57,846 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 07:56:57,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899600707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:57,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:57,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 07:56:57,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730993126] [2021-06-05 07:56:57,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:56:57,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:57,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:56:57,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:56:57,847 INFO L87 Difference]: Start difference. First operand 1888 states and 5178 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 07:56:58,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:58,088 INFO L93 Difference]: Finished difference Result 2656 states and 6917 transitions. [2021-06-05 07:56:58,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:56:58,088 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 07:56:58,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:58,091 INFO L225 Difference]: With dead ends: 2656 [2021-06-05 07:56:58,091 INFO L226 Difference]: Without dead ends: 2386 [2021-06-05 07:56:58,091 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 213.2ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:56:58,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2386 states. [2021-06-05 07:56:58,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2386 to 1963. [2021-06-05 07:56:58,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 2.753822629969419) internal successors, (5403), 1962 states have internal predecessors, (5403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:56:58,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 5403 transitions. [2021-06-05 07:56:58,119 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 5403 transitions. Word has length 70 [2021-06-05 07:56:58,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:58,119 INFO L482 AbstractCegarLoop]: Abstraction has 1963 states and 5403 transitions. [2021-06-05 07:56:58,119 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 07:56:58,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 5403 transitions. [2021-06-05 07:56:58,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 07:56:58,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:58,122 INFO L521 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 07:56:58,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 07:56:58,322 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:58,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:58,323 INFO L82 PathProgramCache]: Analyzing trace with hash -729720745, now seen corresponding path program 29 times [2021-06-05 07:56:58,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:58,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126616769] [2021-06-05 07:56:58,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:58,408 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 07:56:58,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:58,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126616769] [2021-06-05 07:56:58,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126616769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:58,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877797940] [2021-06-05 07:56:58,408 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 07:56:58,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 07:56:58,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:58,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 07:56:58,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:58,554 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 07:56:58,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877797940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:58,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:58,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 07:56:58,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128994013] [2021-06-05 07:56:58,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:56:58,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:58,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:56:58,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:56:58,555 INFO L87 Difference]: Start difference. First operand 1963 states and 5403 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 07:56:58,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:58,868 INFO L93 Difference]: Finished difference Result 2741 states and 7207 transitions. [2021-06-05 07:56:58,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:56:58,869 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 07:56:58,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:58,871 INFO L225 Difference]: With dead ends: 2741 [2021-06-05 07:56:58,872 INFO L226 Difference]: Without dead ends: 2471 [2021-06-05 07:56:58,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 279.6ms TimeCoverageRelationStatistics Valid=267, Invalid=789, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:56:58,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2021-06-05 07:56:58,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2038. [2021-06-05 07:56:58,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2038 states, 2037 states have (on average 2.7727049582719685) internal successors, (5648), 2037 states have internal predecessors, (5648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:56:58,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2038 states to 2038 states and 5648 transitions. [2021-06-05 07:56:58,894 INFO L78 Accepts]: Start accepts. Automaton has 2038 states and 5648 transitions. Word has length 70 [2021-06-05 07:56:58,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:58,894 INFO L482 AbstractCegarLoop]: Abstraction has 2038 states and 5648 transitions. [2021-06-05 07:56:58,894 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 07:56:58,894 INFO L276 IsEmpty]: Start isEmpty. Operand 2038 states and 5648 transitions. [2021-06-05 07:56:58,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 07:56:58,896 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:58,896 INFO L521 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 07:56:59,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 07:56:59,109 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:59,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:59,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1762368347, now seen corresponding path program 30 times [2021-06-05 07:56:59,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:59,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084450207] [2021-06-05 07:56:59,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:59,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:59,181 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 07:56:59,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:59,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084450207] [2021-06-05 07:56:59,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084450207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:59,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606554854] [2021-06-05 07:56:59,181 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 07:56:59,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:56:59,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:59,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 07:56:59,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:59,350 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 07:56:59,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606554854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:59,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:59,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 07:56:59,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479207086] [2021-06-05 07:56:59,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:56:59,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:59,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:56:59,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:56:59,351 INFO L87 Difference]: Start difference. First operand 2038 states and 5648 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 07:56:59,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:59,636 INFO L93 Difference]: Finished difference Result 3508 states and 9381 transitions. [2021-06-05 07:56:59,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:56:59,636 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 07:56:59,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:59,640 INFO L225 Difference]: With dead ends: 3508 [2021-06-05 07:56:59,640 INFO L226 Difference]: Without dead ends: 3238 [2021-06-05 07:56:59,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 198.2ms TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:56:59,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3238 states. [2021-06-05 07:56:59,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3238 to 2218. [2021-06-05 07:56:59,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 2.7997293640054126) internal successors, (6207), 2217 states have internal predecessors, (6207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:56:59,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 6207 transitions. [2021-06-05 07:56:59,673 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 6207 transitions. Word has length 70 [2021-06-05 07:56:59,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:59,673 INFO L482 AbstractCegarLoop]: Abstraction has 2218 states and 6207 transitions. [2021-06-05 07:56:59,673 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 07:56:59,673 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 6207 transitions. [2021-06-05 07:56:59,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 07:56:59,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:59,676 INFO L521 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 07:56:59,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 07:56:59,897 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:59,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:59,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1740025097, now seen corresponding path program 31 times [2021-06-05 07:56:59,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:59,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214589027] [2021-06-05 07:56:59,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:59,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:59,980 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 07:56:59,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:59,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214589027] [2021-06-05 07:56:59,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214589027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:59,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574514876] [2021-06-05 07:56:59,981 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 07:57:00,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:00,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 07:57:00,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:00,155 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 07:57:00,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574514876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:00,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:00,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 07:57:00,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202593102] [2021-06-05 07:57:00,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:57:00,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:00,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:57:00,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:57:00,157 INFO L87 Difference]: Start difference. First operand 2218 states and 6207 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 07:57:00,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:00,580 INFO L93 Difference]: Finished difference Result 3451 states and 9241 transitions. [2021-06-05 07:57:00,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:57:00,580 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 07:57:00,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:00,584 INFO L225 Difference]: With dead ends: 3451 [2021-06-05 07:57:00,584 INFO L226 Difference]: Without dead ends: 2876 [2021-06-05 07:57:00,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 368.2ms TimeCoverageRelationStatistics Valid=357, Invalid=1049, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 07:57:00,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-06-05 07:57:00,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2253. [2021-06-05 07:57:00,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7899644760213143) internal successors, (6283), 2252 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:00,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6283 transitions. [2021-06-05 07:57:00,617 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6283 transitions. Word has length 70 [2021-06-05 07:57:00,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:00,617 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6283 transitions. [2021-06-05 07:57:00,618 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 07:57:00,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6283 transitions. [2021-06-05 07:57:00,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 07:57:00,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:00,621 INFO L521 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 07:57:00,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 07:57:00,827 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:00,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:00,827 INFO L82 PathProgramCache]: Analyzing trace with hash 751678088, now seen corresponding path program 32 times [2021-06-05 07:57:00,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:00,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111170943] [2021-06-05 07:57:00,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:00,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:00,922 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 07:57:00,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:00,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111170943] [2021-06-05 07:57:00,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111170943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:00,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754461391] [2021-06-05 07:57:00,923 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 07:57:00,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:57:00,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:00,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:57:00,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:01,080 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 07:57:01,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754461391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:01,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:01,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 07:57:01,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717744605] [2021-06-05 07:57:01,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:57:01,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:01,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:57:01,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:57:01,081 INFO L87 Difference]: Start difference. First operand 2253 states and 6283 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 07:57:01,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:01,264 INFO L93 Difference]: Finished difference Result 2996 states and 7897 transitions. [2021-06-05 07:57:01,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:57:01,264 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 07:57:01,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:01,267 INFO L225 Difference]: With dead ends: 2996 [2021-06-05 07:57:01,267 INFO L226 Difference]: Without dead ends: 2726 [2021-06-05 07:57:01,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 170.3ms TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:57:01,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2021-06-05 07:57:01,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 2253. [2021-06-05 07:57:01,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7899644760213143) internal successors, (6283), 2252 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:01,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6283 transitions. [2021-06-05 07:57:01,291 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6283 transitions. Word has length 75 [2021-06-05 07:57:01,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:01,291 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6283 transitions. [2021-06-05 07:57:01,292 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 07:57:01,292 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6283 transitions. [2021-06-05 07:57:01,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 07:57:01,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:01,294 INFO L521 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 07:57:01,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:01,494 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:01,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:01,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1750574424, now seen corresponding path program 33 times [2021-06-05 07:57:01,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:01,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847156518] [2021-06-05 07:57:01,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:01,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:01,590 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 07:57:01,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:01,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847156518] [2021-06-05 07:57:01,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847156518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:01,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746422758] [2021-06-05 07:57:01,590 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 07:57:01,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 07:57:01,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:01,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:57:01,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:01,778 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 07:57:01,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746422758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:01,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:01,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 07:57:01,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542222508] [2021-06-05 07:57:01,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:57:01,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:01,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:57:01,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:57:01,782 INFO L87 Difference]: Start difference. First operand 2253 states and 6283 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 07:57:02,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:02,019 INFO L93 Difference]: Finished difference Result 3141 states and 8187 transitions. [2021-06-05 07:57:02,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:57:02,019 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 07:57:02,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:02,022 INFO L225 Difference]: With dead ends: 3141 [2021-06-05 07:57:02,022 INFO L226 Difference]: Without dead ends: 2871 [2021-06-05 07:57:02,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 222.6ms TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:57:02,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2021-06-05 07:57:02,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 2253. [2021-06-05 07:57:02,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7899644760213143) internal successors, (6283), 2252 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:02,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6283 transitions. [2021-06-05 07:57:02,046 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6283 transitions. Word has length 75 [2021-06-05 07:57:02,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:02,046 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6283 transitions. [2021-06-05 07:57:02,046 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 07:57:02,047 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6283 transitions. [2021-06-05 07:57:02,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 07:57:02,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:02,049 INFO L521 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 07:57:02,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 07:57:02,249 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:02,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:02,250 INFO L82 PathProgramCache]: Analyzing trace with hash -128753466, now seen corresponding path program 34 times [2021-06-05 07:57:02,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:02,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192885383] [2021-06-05 07:57:02,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:02,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:02,333 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 07:57:02,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:02,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192885383] [2021-06-05 07:57:02,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192885383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:02,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292930917] [2021-06-05 07:57:02,334 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 07:57:02,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:57:02,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:02,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:57:02,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:02,468 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 07:57:02,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292930917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:02,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:02,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 07:57:02,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014392342] [2021-06-05 07:57:02,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:57:02,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:02,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:57:02,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:57:02,469 INFO L87 Difference]: Start difference. First operand 2253 states and 6283 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 07:57:02,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:02,686 INFO L93 Difference]: Finished difference Result 3096 states and 8097 transitions. [2021-06-05 07:57:02,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:57:02,686 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 07:57:02,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:02,689 INFO L225 Difference]: With dead ends: 3096 [2021-06-05 07:57:02,690 INFO L226 Difference]: Without dead ends: 2826 [2021-06-05 07:57:02,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 191.4ms TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:57:02,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2021-06-05 07:57:02,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 2253. [2021-06-05 07:57:02,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7899644760213143) internal successors, (6283), 2252 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:02,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6283 transitions. [2021-06-05 07:57:02,719 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6283 transitions. Word has length 75 [2021-06-05 07:57:02,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:02,719 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6283 transitions. [2021-06-05 07:57:02,720 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 07:57:02,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6283 transitions. [2021-06-05 07:57:02,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 07:57:02,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:02,723 INFO L521 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 07:57:02,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 07:57:02,939 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:02,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:02,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1901565846, now seen corresponding path program 35 times [2021-06-05 07:57:02,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:02,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584555103] [2021-06-05 07:57:02,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:02,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:03,034 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 07:57:03,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:03,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584555103] [2021-06-05 07:57:03,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584555103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:03,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473275913] [2021-06-05 07:57:03,035 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 07:57:03,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 07:57:03,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:03,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:57:03,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:03,197 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 07:57:03,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473275913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:03,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:03,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 07:57:03,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925951830] [2021-06-05 07:57:03,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:57:03,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:03,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:57:03,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:57:03,198 INFO L87 Difference]: Start difference. First operand 2253 states and 6283 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 07:57:03,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:03,490 INFO L93 Difference]: Finished difference Result 3046 states and 7997 transitions. [2021-06-05 07:57:03,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:57:03,491 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 07:57:03,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:03,494 INFO L225 Difference]: With dead ends: 3046 [2021-06-05 07:57:03,494 INFO L226 Difference]: Without dead ends: 2776 [2021-06-05 07:57:03,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 260.0ms TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:57:03,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-06-05 07:57:03,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2253. [2021-06-05 07:57:03,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7899644760213143) internal successors, (6283), 2252 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:03,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6283 transitions. [2021-06-05 07:57:03,529 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6283 transitions. Word has length 75 [2021-06-05 07:57:03,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:03,530 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6283 transitions. [2021-06-05 07:57:03,530 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 07:57:03,530 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6283 transitions. [2021-06-05 07:57:03,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 07:57:03,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:03,533 INFO L521 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 07:57:03,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:03,751 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:03,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:03,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1779161980, now seen corresponding path program 36 times [2021-06-05 07:57:03,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:03,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495244178] [2021-06-05 07:57:03,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:03,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:03,860 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 07:57:03,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:03,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495244178] [2021-06-05 07:57:03,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495244178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:03,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595222610] [2021-06-05 07:57:03,862 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 07:57:03,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:57:03,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:03,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:57:03,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:04,016 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 07:57:04,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595222610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:04,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:04,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 07:57:04,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769878240] [2021-06-05 07:57:04,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:57:04,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:04,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:57:04,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:57:04,017 INFO L87 Difference]: Start difference. First operand 2253 states and 6283 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 07:57:04,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:04,258 INFO L93 Difference]: Finished difference Result 2996 states and 7897 transitions. [2021-06-05 07:57:04,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:57:04,258 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 07:57:04,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:04,261 INFO L225 Difference]: With dead ends: 2996 [2021-06-05 07:57:04,261 INFO L226 Difference]: Without dead ends: 2726 [2021-06-05 07:57:04,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 231.1ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:57:04,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2021-06-05 07:57:04,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 2253. [2021-06-05 07:57:04,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7899644760213143) internal successors, (6283), 2252 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:04,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6283 transitions. [2021-06-05 07:57:04,291 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6283 transitions. Word has length 75 [2021-06-05 07:57:04,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:04,291 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6283 transitions. [2021-06-05 07:57:04,291 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 07:57:04,291 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6283 transitions. [2021-06-05 07:57:04,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 07:57:04,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:04,294 INFO L521 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 07:57:04,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 07:57:04,494 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:04,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:04,495 INFO L82 PathProgramCache]: Analyzing trace with hash 800563028, now seen corresponding path program 37 times [2021-06-05 07:57:04,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:04,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857180765] [2021-06-05 07:57:04,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:04,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:04,583 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 07:57:04,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:04,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857180765] [2021-06-05 07:57:04,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857180765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:04,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132794453] [2021-06-05 07:57:04,584 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 07:57:04,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:04,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:57:04,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:04,763 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 07:57:04,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132794453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:04,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:04,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 07:57:04,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178102531] [2021-06-05 07:57:04,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:57:04,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:04,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:57:04,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:57:04,765 INFO L87 Difference]: Start difference. First operand 2253 states and 6283 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 07:57:05,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:05,082 INFO L93 Difference]: Finished difference Result 3006 states and 7947 transitions. [2021-06-05 07:57:05,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:57:05,082 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 07:57:05,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:05,085 INFO L225 Difference]: With dead ends: 3006 [2021-06-05 07:57:05,085 INFO L226 Difference]: Without dead ends: 2736 [2021-06-05 07:57:05,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 288.8ms TimeCoverageRelationStatistics Valid=301, Invalid=889, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:57:05,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-06-05 07:57:05,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2253. [2021-06-05 07:57:05,109 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 07:57:05,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6288 transitions. [2021-06-05 07:57:05,112 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6288 transitions. Word has length 75 [2021-06-05 07:57:05,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:05,112 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6288 transitions. [2021-06-05 07:57:05,112 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 07:57:05,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6288 transitions. [2021-06-05 07:57:05,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 07:57:05,115 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:05,115 INFO L521 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 07:57:05,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:05,316 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:05,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:05,316 INFO L82 PathProgramCache]: Analyzing trace with hash -232084574, now seen corresponding path program 38 times [2021-06-05 07:57:05,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:05,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371180936] [2021-06-05 07:57:05,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:05,393 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 07:57:05,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:05,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371180936] [2021-06-05 07:57:05,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371180936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:05,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460328176] [2021-06-05 07:57:05,394 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 07:57:05,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:57:05,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:05,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:57:05,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:05,547 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 07:57:05,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460328176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:05,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:05,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 07:57:05,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054146474] [2021-06-05 07:57:05,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:57:05,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:05,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:57:05,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:57:05,549 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 07:57:05,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:05,818 INFO L93 Difference]: Finished difference Result 3748 states and 10071 transitions. [2021-06-05 07:57:05,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:57:05,818 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 07:57:05,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:05,821 INFO L225 Difference]: With dead ends: 3748 [2021-06-05 07:57:05,821 INFO L226 Difference]: Without dead ends: 3478 [2021-06-05 07:57:05,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 233.4ms TimeCoverageRelationStatistics Valid=340, Invalid=850, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:57:05,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2021-06-05 07:57:05,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 2433. [2021-06-05 07:57:05,853 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 07:57:05,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 6847 transitions. [2021-06-05 07:57:05,857 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 6847 transitions. Word has length 75 [2021-06-05 07:57:05,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:05,857 INFO L482 AbstractCegarLoop]: Abstraction has 2433 states and 6847 transitions. [2021-06-05 07:57:05,857 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 07:57:05,857 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 6847 transitions. [2021-06-05 07:57:05,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 07:57:05,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:05,860 INFO L521 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 07:57:06,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 07:57:06,083 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:06,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:06,083 INFO L82 PathProgramCache]: Analyzing trace with hash -209741324, now seen corresponding path program 39 times [2021-06-05 07:57:06,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:06,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658234427] [2021-06-05 07:57:06,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:06,169 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 07:57:06,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:06,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658234427] [2021-06-05 07:57:06,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658234427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:06,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550002681] [2021-06-05 07:57:06,169 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 07:57:06,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 07:57:06,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:06,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:57:06,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:06,336 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 07:57:06,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550002681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:06,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:06,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 07:57:06,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574627527] [2021-06-05 07:57:06,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:57:06,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:06,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:57:06,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:57:06,338 INFO L87 Difference]: Start difference. First operand 2433 states and 6847 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 07:57:06,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:06,673 INFO L93 Difference]: Finished difference Result 3210 states and 8721 transitions. [2021-06-05 07:57:06,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:57:06,673 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 07:57:06,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:06,676 INFO L225 Difference]: With dead ends: 3210 [2021-06-05 07:57:06,676 INFO L226 Difference]: Without dead ends: 2721 [2021-06-05 07:57:06,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 297.4ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:57:06,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2021-06-05 07:57:06,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2378. [2021-06-05 07:57:06,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.8115271350441735) internal successors, (6683), 2377 states have internal predecessors, (6683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:06,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6683 transitions. [2021-06-05 07:57:06,698 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6683 transitions. Word has length 75 [2021-06-05 07:57:06,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:06,698 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6683 transitions. [2021-06-05 07:57:06,698 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 07:57:06,698 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6683 transitions. [2021-06-05 07:57:06,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 07:57:06,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:06,701 INFO L521 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 07:57:06,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:06,901 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:06,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:06,901 INFO L82 PathProgramCache]: Analyzing trace with hash 452139800, now seen corresponding path program 40 times [2021-06-05 07:57:06,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:06,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934293810] [2021-06-05 07:57:06,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:06,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:07,034 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 07:57:07,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:07,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934293810] [2021-06-05 07:57:07,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934293810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:07,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045837744] [2021-06-05 07:57:07,034 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 07:57:07,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:57:07,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:07,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 07:57:07,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:07,237 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 07:57:07,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045837744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:07,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:07,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2021-06-05 07:57:07,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026014889] [2021-06-05 07:57:07,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:57:07,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:07,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:57:07,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:57:07,239 INFO L87 Difference]: Start difference. First operand 2378 states and 6683 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 07:57:07,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:07,487 INFO L93 Difference]: Finished difference Result 3268 states and 8783 transitions. [2021-06-05 07:57:07,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:57:07,487 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 07:57:07,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:07,491 INFO L225 Difference]: With dead ends: 3268 [2021-06-05 07:57:07,491 INFO L226 Difference]: Without dead ends: 2934 [2021-06-05 07:57:07,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 286.0ms TimeCoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:57:07,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-06-05 07:57:07,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 2463. [2021-06-05 07:57:07,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 2462 states have (on average 2.7835093419983754) internal successors, (6853), 2462 states have internal predecessors, (6853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:07,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 6853 transitions. [2021-06-05 07:57:07,524 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 6853 transitions. Word has length 80 [2021-06-05 07:57:07,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:07,524 INFO L482 AbstractCegarLoop]: Abstraction has 2463 states and 6853 transitions. [2021-06-05 07:57:07,524 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 07:57:07,524 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 6853 transitions. [2021-06-05 07:57:07,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 07:57:07,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:07,527 INFO L521 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 07:57:07,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 07:57:07,728 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:07,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:07,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1173866716, now seen corresponding path program 41 times [2021-06-05 07:57:07,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:07,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243589060] [2021-06-05 07:57:07,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:07,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:07,855 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 07:57:07,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:07,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243589060] [2021-06-05 07:57:07,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243589060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:07,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933381936] [2021-06-05 07:57:07,855 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 07:57:07,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:57:07,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:07,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:57:07,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:08,010 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 07:57:08,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933381936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:08,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:08,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 07:57:08,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493014212] [2021-06-05 07:57:08,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:57:08,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:08,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:57:08,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:57:08,011 INFO L87 Difference]: Start difference. First operand 2463 states and 6853 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 07:57:08,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:08,174 INFO L93 Difference]: Finished difference Result 3561 states and 9177 transitions. [2021-06-05 07:57:08,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:57:08,175 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 07:57:08,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:08,178 INFO L225 Difference]: With dead ends: 3561 [2021-06-05 07:57:08,178 INFO L226 Difference]: Without dead ends: 3291 [2021-06-05 07:57:08,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 184.0ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:57:08,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3291 states. [2021-06-05 07:57:08,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3291 to 2478. [2021-06-05 07:57:08,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:08,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-05 07:57:08,202 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-05 07:57:08,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:08,202 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-05 07:57:08,202 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 07:57:08,202 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-05 07:57:08,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 07:57:08,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:08,205 INFO L521 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 07:57:08,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 07:57:08,405 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:08,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:08,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1794345044, now seen corresponding path program 42 times [2021-06-05 07:57:08,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:08,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732161110] [2021-06-05 07:57:08,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:08,531 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 07:57:08,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:08,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732161110] [2021-06-05 07:57:08,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732161110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:08,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470156715] [2021-06-05 07:57:08,531 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 07:57:08,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:57:08,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:08,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:57:08,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:08,718 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 07:57:08,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470156715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:08,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:08,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 07:57:08,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237820285] [2021-06-05 07:57:08,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:57:08,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:08,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:57:08,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:57:08,720 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 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 07:57:09,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:09,009 INFO L93 Difference]: Finished difference Result 3446 states and 8947 transitions. [2021-06-05 07:57:09,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:57:09,010 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 07:57:09,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:09,014 INFO L225 Difference]: With dead ends: 3446 [2021-06-05 07:57:09,014 INFO L226 Difference]: Without dead ends: 3176 [2021-06-05 07:57:09,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 295.1ms TimeCoverageRelationStatistics Valid=264, Invalid=792, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:57:09,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-06-05 07:57:09,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2478. [2021-06-05 07:57:09,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:09,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-05 07:57:09,046 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-05 07:57:09,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:09,047 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-05 07:57:09,047 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 07:57:09,047 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-05 07:57:09,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 07:57:09,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:09,051 INFO L521 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 07:57:09,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:09,267 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:09,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:09,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1340128870, now seen corresponding path program 43 times [2021-06-05 07:57:09,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:09,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792772569] [2021-06-05 07:57:09,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:09,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:09,391 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 07:57:09,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:09,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792772569] [2021-06-05 07:57:09,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792772569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:09,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212918804] [2021-06-05 07:57:09,392 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 07:57:09,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:09,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:57:09,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:09,560 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 07:57:09,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212918804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:09,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:09,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 07:57:09,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830626737] [2021-06-05 07:57:09,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:57:09,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:09,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:57:09,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:57:09,561 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 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 07:57:09,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:09,771 INFO L93 Difference]: Finished difference Result 3421 states and 8897 transitions. [2021-06-05 07:57:09,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:57:09,771 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 07:57:09,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:09,774 INFO L225 Difference]: With dead ends: 3421 [2021-06-05 07:57:09,774 INFO L226 Difference]: Without dead ends: 3151 [2021-06-05 07:57:09,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 210.1ms TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:57:09,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-06-05 07:57:09,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2478. [2021-06-05 07:57:09,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:09,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-05 07:57:09,800 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-05 07:57:09,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:09,800 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-05 07:57:09,800 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 07:57:09,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-05 07:57:09,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 07:57:09,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:09,802 INFO L521 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 07:57:10,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 07:57:10,003 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:10,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:10,003 INFO L82 PathProgramCache]: Analyzing trace with hash -341232534, now seen corresponding path program 44 times [2021-06-05 07:57:10,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:10,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139037315] [2021-06-05 07:57:10,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:10,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:10,118 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 07:57:10,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:10,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139037315] [2021-06-05 07:57:10,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139037315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:10,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938026883] [2021-06-05 07:57:10,118 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 07:57:10,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:57:10,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:10,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:57:10,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:10,297 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 07:57:10,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938026883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:10,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:10,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 07:57:10,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771392806] [2021-06-05 07:57:10,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:57:10,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:10,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:57:10,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:57:10,299 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 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 07:57:10,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:10,664 INFO L93 Difference]: Finished difference Result 3371 states and 8797 transitions. [2021-06-05 07:57:10,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:57:10,665 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 07:57:10,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:10,668 INFO L225 Difference]: With dead ends: 3371 [2021-06-05 07:57:10,669 INFO L226 Difference]: Without dead ends: 3101 [2021-06-05 07:57:10,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 341.4ms TimeCoverageRelationStatistics Valid=286, Invalid=904, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:57:10,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3101 states. [2021-06-05 07:57:10,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3101 to 2478. [2021-06-05 07:57:10,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:10,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-05 07:57:10,698 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-05 07:57:10,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:10,698 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-05 07:57:10,698 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 07:57:10,698 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-05 07:57:10,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 07:57:10,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:10,700 INFO L521 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 07:57:10,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:10,916 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:10,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:10,916 INFO L82 PathProgramCache]: Analyzing trace with hash 2074406872, now seen corresponding path program 45 times [2021-06-05 07:57:10,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:10,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525540814] [2021-06-05 07:57:10,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:10,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:11,008 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 07:57:11,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:11,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525540814] [2021-06-05 07:57:11,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525540814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:11,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648052546] [2021-06-05 07:57:11,008 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 07:57:11,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:57:11,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:11,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:57:11,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:11,172 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 07:57:11,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648052546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:11,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:11,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 07:57:11,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28708333] [2021-06-05 07:57:11,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:57:11,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:11,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:57:11,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:57:11,174 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 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 07:57:11,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:11,448 INFO L93 Difference]: Finished difference Result 3321 states and 8697 transitions. [2021-06-05 07:57:11,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:57:11,449 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 07:57:11,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:11,451 INFO L225 Difference]: With dead ends: 3321 [2021-06-05 07:57:11,451 INFO L226 Difference]: Without dead ends: 3051 [2021-06-05 07:57:11,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 247.9ms TimeCoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:57:11,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2021-06-05 07:57:11,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 2478. [2021-06-05 07:57:11,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:11,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-05 07:57:11,473 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-05 07:57:11,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:11,473 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-05 07:57:11,473 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 07:57:11,473 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-05 07:57:11,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 07:57:11,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:11,475 INFO L521 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 07:57:11,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:11,676 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:11,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:11,676 INFO L82 PathProgramCache]: Analyzing trace with hash -190241112, now seen corresponding path program 46 times [2021-06-05 07:57:11,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:11,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383894081] [2021-06-05 07:57:11,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:11,786 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 07:57:11,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:11,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383894081] [2021-06-05 07:57:11,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383894081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:11,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711908374] [2021-06-05 07:57:11,787 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 07:57:11,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:57:11,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:11,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:57:11,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:11,941 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 07:57:11,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711908374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:11,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:11,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 07:57:11,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661256657] [2021-06-05 07:57:11,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:57:11,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:11,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:57:11,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:57:11,942 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 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 07:57:12,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:12,247 INFO L93 Difference]: Finished difference Result 3271 states and 8597 transitions. [2021-06-05 07:57:12,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:57:12,247 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 07:57:12,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:12,250 INFO L225 Difference]: With dead ends: 3271 [2021-06-05 07:57:12,250 INFO L226 Difference]: Without dead ends: 3001 [2021-06-05 07:57:12,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 310.5ms TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:57:12,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-06-05 07:57:12,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 2478. [2021-06-05 07:57:12,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:12,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-05 07:57:12,272 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-05 07:57:12,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:12,272 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-05 07:57:12,272 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 07:57:12,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-05 07:57:12,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 07:57:12,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:12,274 INFO L521 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 07:57:12,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 07:57:12,475 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:12,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:12,475 INFO L82 PathProgramCache]: Analyzing trace with hash 423998358, now seen corresponding path program 47 times [2021-06-05 07:57:12,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:12,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942172322] [2021-06-05 07:57:12,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:12,571 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 07:57:12,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:12,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942172322] [2021-06-05 07:57:12,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942172322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:12,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703843198] [2021-06-05 07:57:12,572 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 07:57:12,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:57:12,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:12,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:57:12,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:12,720 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 07:57:12,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703843198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:12,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:12,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 07:57:12,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586370918] [2021-06-05 07:57:12,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:57:12,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:12,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:57:12,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:57:12,721 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 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 07:57:12,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:12,968 INFO L93 Difference]: Finished difference Result 3221 states and 8497 transitions. [2021-06-05 07:57:12,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:57:12,968 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 07:57:12,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:12,971 INFO L225 Difference]: With dead ends: 3221 [2021-06-05 07:57:12,971 INFO L226 Difference]: Without dead ends: 2951 [2021-06-05 07:57:12,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 237.6ms TimeCoverageRelationStatistics Valid=305, Invalid=885, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:57:12,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-06-05 07:57:12,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2478. [2021-06-05 07:57:12,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:12,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-05 07:57:12,995 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-05 07:57:12,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:12,995 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-05 07:57:12,995 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 07:57:12,995 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-05 07:57:12,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 07:57:12,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:12,997 INFO L521 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 07:57:13,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:13,198 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:13,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:13,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1291243930, now seen corresponding path program 48 times [2021-06-05 07:57:13,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:13,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175213372] [2021-06-05 07:57:13,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:13,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:13,290 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 07:57:13,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:13,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175213372] [2021-06-05 07:57:13,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175213372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:13,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447212297] [2021-06-05 07:57:13,291 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 07:57:13,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:57:13,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:13,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:57:13,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:13,457 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 07:57:13,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447212297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:13,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:13,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 07:57:13,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892838539] [2021-06-05 07:57:13,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:57:13,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:13,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:57:13,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:57:13,459 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 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 07:57:13,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:13,879 INFO L93 Difference]: Finished difference Result 3679 states and 9763 transitions. [2021-06-05 07:57:13,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:57:13,879 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 07:57:13,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:13,882 INFO L225 Difference]: With dead ends: 3679 [2021-06-05 07:57:13,882 INFO L226 Difference]: Without dead ends: 3056 [2021-06-05 07:57:13,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 372.9ms TimeCoverageRelationStatistics Valid=401, Invalid=1239, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:57:13,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2021-06-05 07:57:13,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 2388. [2021-06-05 07:57:13,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 2.785085881860075) internal successors, (6648), 2387 states have internal predecessors, (6648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:13,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 6648 transitions. [2021-06-05 07:57:13,908 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 6648 transitions. Word has length 80 [2021-06-05 07:57:13,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:13,908 INFO L482 AbstractCegarLoop]: Abstraction has 2388 states and 6648 transitions. [2021-06-05 07:57:13,908 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 07:57:13,908 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 6648 transitions. [2021-06-05 07:57:13,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 07:57:13,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:13,910 INFO L521 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 07:57:14,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 07:57:14,110 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:14,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:14,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1971075764, now seen corresponding path program 49 times [2021-06-05 07:57:14,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:14,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976864481] [2021-06-05 07:57:14,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:14,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:14,191 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 07:57:14,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:14,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976864481] [2021-06-05 07:57:14,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976864481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:14,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763289867] [2021-06-05 07:57:14,192 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 07:57:14,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:14,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:57:14,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:14,332 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 07:57:14,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763289867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:14,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:14,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 07:57:14,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129297484] [2021-06-05 07:57:14,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:57:14,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:14,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:57:14,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:57:14,333 INFO L87 Difference]: Start difference. First operand 2388 states and 6648 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 07:57:14,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:14,623 INFO L93 Difference]: Finished difference Result 3908 states and 10481 transitions. [2021-06-05 07:57:14,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:57:14,623 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 07:57:14,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:14,628 INFO L225 Difference]: With dead ends: 3908 [2021-06-05 07:57:14,628 INFO L226 Difference]: Without dead ends: 3638 [2021-06-05 07:57:14,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 252.2ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:57:14,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3638 states. [2021-06-05 07:57:14,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3638 to 2568. [2021-06-05 07:57:14,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 2567 states have (on average 2.8075574600701207) internal successors, (7207), 2567 states have internal predecessors, (7207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:14,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 7207 transitions. [2021-06-05 07:57:14,673 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 7207 transitions. Word has length 80 [2021-06-05 07:57:14,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:14,674 INFO L482 AbstractCegarLoop]: Abstraction has 2568 states and 7207 transitions. [2021-06-05 07:57:14,674 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 07:57:14,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 7207 transitions. [2021-06-05 07:57:14,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 07:57:14,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:14,676 INFO L521 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 07:57:14,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 07:57:14,893 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:14,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:14,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1993419014, now seen corresponding path program 50 times [2021-06-05 07:57:14,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:14,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67701099] [2021-06-05 07:57:14,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:14,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:14,984 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 07:57:14,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:14,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67701099] [2021-06-05 07:57:14,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67701099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:14,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873728296] [2021-06-05 07:57:14,984 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 07:57:15,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:57:15,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:15,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:57:15,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:15,141 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 07:57:15,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873728296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:15,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:15,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 07:57:15,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785562410] [2021-06-05 07:57:15,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:57:15,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:15,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:57:15,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:57:15,143 INFO L87 Difference]: Start difference. First operand 2568 states and 7207 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 07:57:15,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:15,624 INFO L93 Difference]: Finished difference Result 3851 states and 10341 transitions. [2021-06-05 07:57:15,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:57:15,624 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 07:57:15,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:15,628 INFO L225 Difference]: With dead ends: 3851 [2021-06-05 07:57:15,628 INFO L226 Difference]: Without dead ends: 3276 [2021-06-05 07:57:15,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 422.0ms TimeCoverageRelationStatistics Valid=484, Invalid=1408, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:57:15,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2021-06-05 07:57:15,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2603. [2021-06-05 07:57:15,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:15,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-05 07:57:15,654 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 80 [2021-06-05 07:57:15,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:15,654 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-05 07:57:15,655 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 07:57:15,655 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-05 07:57:15,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 07:57:15,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:15,657 INFO L521 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 07:57:15,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 07:57:15,857 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:15,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:15,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1150498713, now seen corresponding path program 51 times [2021-06-05 07:57:15,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:15,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655150745] [2021-06-05 07:57:15,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:15,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:15,968 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 07:57:15,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:15,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655150745] [2021-06-05 07:57:15,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655150745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:15,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591384138] [2021-06-05 07:57:15,969 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 07:57:16,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:57:16,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:16,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 07:57:16,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:16,168 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 07:57:16,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591384138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:16,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:16,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 07:57:16,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958579315] [2021-06-05 07:57:16,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:57:16,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:16,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:57:16,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:57:16,170 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 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 07:57:16,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:16,434 INFO L93 Difference]: Finished difference Result 3446 states and 9097 transitions. [2021-06-05 07:57:16,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:57:16,434 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 07:57:16,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:16,438 INFO L225 Difference]: With dead ends: 3446 [2021-06-05 07:57:16,438 INFO L226 Difference]: Without dead ends: 3176 [2021-06-05 07:57:16,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 250.4ms TimeCoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:57:16,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-06-05 07:57:16,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2603. [2021-06-05 07:57:16,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:16,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-05 07:57:16,462 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-05 07:57:16,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:16,462 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-05 07:57:16,462 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 07:57:16,462 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-05 07:57:16,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 07:57:16,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:16,464 INFO L521 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 07:57:16,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 07:57:16,665 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:16,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:16,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1817713047, now seen corresponding path program 52 times [2021-06-05 07:57:16,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:16,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600084060] [2021-06-05 07:57:16,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:16,782 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 07:57:16,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:16,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600084060] [2021-06-05 07:57:16,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600084060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:16,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506539593] [2021-06-05 07:57:16,783 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 07:57:16,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:57:16,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:16,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 07:57:16,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:16,982 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 07:57:16,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506539593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:16,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:16,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 07:57:16,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130566352] [2021-06-05 07:57:16,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:57:16,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:16,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:57:16,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:57:16,984 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 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 07:57:17,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:17,246 INFO L93 Difference]: Finished difference Result 3641 states and 9487 transitions. [2021-06-05 07:57:17,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:57:17,247 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 07:57:17,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:17,250 INFO L225 Difference]: With dead ends: 3641 [2021-06-05 07:57:17,250 INFO L226 Difference]: Without dead ends: 3371 [2021-06-05 07:57:17,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 278.4ms TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:57:17,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3371 states. [2021-06-05 07:57:17,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3371 to 2603. [2021-06-05 07:57:17,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:17,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-05 07:57:17,307 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-05 07:57:17,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:17,307 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-05 07:57:17,307 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 07:57:17,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-05 07:57:17,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 07:57:17,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:17,310 INFO L521 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 07:57:17,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:17,521 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:17,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:17,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1363496873, now seen corresponding path program 53 times [2021-06-05 07:57:17,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:17,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725870629] [2021-06-05 07:57:17,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:17,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:17,619 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 07:57:17,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:17,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725870629] [2021-06-05 07:57:17,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725870629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:17,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549775028] [2021-06-05 07:57:17,620 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 07:57:17,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:57:17,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:17,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 07:57:17,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:17,792 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 07:57:17,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549775028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:17,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:17,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 07:57:17,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068879424] [2021-06-05 07:57:17,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:57:17,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:17,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:57:17,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:57:17,793 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 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 07:57:18,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:18,074 INFO L93 Difference]: Finished difference Result 3596 states and 9397 transitions. [2021-06-05 07:57:18,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:57:18,074 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 07:57:18,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:18,078 INFO L225 Difference]: With dead ends: 3596 [2021-06-05 07:57:18,078 INFO L226 Difference]: Without dead ends: 3326 [2021-06-05 07:57:18,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 259.9ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:57:18,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2021-06-05 07:57:18,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 2603. [2021-06-05 07:57:18,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:18,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-05 07:57:18,106 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-05 07:57:18,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:18,106 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-05 07:57:18,106 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 07:57:18,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-05 07:57:18,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 07:57:18,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:18,108 INFO L521 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 07:57:18,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:18,331 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:18,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:18,331 INFO L82 PathProgramCache]: Analyzing trace with hash -364600537, now seen corresponding path program 54 times [2021-06-05 07:57:18,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:18,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276151233] [2021-06-05 07:57:18,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:18,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:18,481 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 07:57:18,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:18,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276151233] [2021-06-05 07:57:18,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276151233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:18,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755350739] [2021-06-05 07:57:18,481 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 07:57:18,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:57:18,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:18,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 07:57:18,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:18,671 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 07:57:18,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755350739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:18,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:18,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 07:57:18,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614097970] [2021-06-05 07:57:18,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:57:18,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:18,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:57:18,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:57:18,672 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 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 07:57:18,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:18,994 INFO L93 Difference]: Finished difference Result 3546 states and 9297 transitions. [2021-06-05 07:57:18,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:57:18,994 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 07:57:18,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:18,998 INFO L225 Difference]: With dead ends: 3546 [2021-06-05 07:57:18,998 INFO L226 Difference]: Without dead ends: 3276 [2021-06-05 07:57:18,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 332.7ms TimeCoverageRelationStatistics Valid=334, Invalid=1072, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 07:57:19,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2021-06-05 07:57:19,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2603. [2021-06-05 07:57:19,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:19,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-05 07:57:19,026 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-05 07:57:19,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:19,026 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-05 07:57:19,026 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 07:57:19,026 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-05 07:57:19,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 07:57:19,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:19,028 INFO L521 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 07:57:19,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:19,229 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:19,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:19,229 INFO L82 PathProgramCache]: Analyzing trace with hash 2051038869, now seen corresponding path program 55 times [2021-06-05 07:57:19,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:19,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780411029] [2021-06-05 07:57:19,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:19,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:19,355 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 07:57:19,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:19,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780411029] [2021-06-05 07:57:19,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780411029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:19,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820071580] [2021-06-05 07:57:19,355 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 07:57:19,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:19,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 07:57:19,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:19,524 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 07:57:19,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820071580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:19,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:19,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 07:57:19,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931913237] [2021-06-05 07:57:19,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:57:19,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:19,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:57:19,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:57:19,525 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 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 07:57:19,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:19,791 INFO L93 Difference]: Finished difference Result 3496 states and 9197 transitions. [2021-06-05 07:57:19,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:57:19,791 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 07:57:19,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:19,795 INFO L225 Difference]: With dead ends: 3496 [2021-06-05 07:57:19,795 INFO L226 Difference]: Without dead ends: 3226 [2021-06-05 07:57:19,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 279.8ms TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 07:57:19,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-06-05 07:57:19,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 2603. [2021-06-05 07:57:19,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:19,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-05 07:57:19,826 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-05 07:57:19,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:19,826 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-05 07:57:19,826 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 07:57:19,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-05 07:57:19,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 07:57:19,829 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:19,829 INFO L521 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 07:57:20,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 07:57:20,043 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:20,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:20,043 INFO L82 PathProgramCache]: Analyzing trace with hash -213609115, now seen corresponding path program 56 times [2021-06-05 07:57:20,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:20,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992505466] [2021-06-05 07:57:20,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:20,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:20,148 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 07:57:20,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:20,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992505466] [2021-06-05 07:57:20,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992505466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:20,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330870188] [2021-06-05 07:57:20,148 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 07:57:20,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:57:20,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:20,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 07:57:20,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:20,338 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 07:57:20,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330870188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:20,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:20,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 07:57:20,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715982884] [2021-06-05 07:57:20,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:57:20,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:20,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:57:20,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:57:20,340 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 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 07:57:20,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:20,683 INFO L93 Difference]: Finished difference Result 3446 states and 9097 transitions. [2021-06-05 07:57:20,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:57:20,683 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 07:57:20,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:20,686 INFO L225 Difference]: With dead ends: 3446 [2021-06-05 07:57:20,686 INFO L226 Difference]: Without dead ends: 3176 [2021-06-05 07:57:20,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 326.2ms TimeCoverageRelationStatistics Valid=379, Invalid=1181, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 07:57:20,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-06-05 07:57:20,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2603. [2021-06-05 07:57:20,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:20,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-05 07:57:20,713 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-05 07:57:20,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:20,713 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-05 07:57:20,713 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 07:57:20,714 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-05 07:57:20,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 07:57:20,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:20,716 INFO L521 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 07:57:20,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:20,916 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:20,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:20,917 INFO L82 PathProgramCache]: Analyzing trace with hash 400630355, now seen corresponding path program 57 times [2021-06-05 07:57:20,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:20,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462808694] [2021-06-05 07:57:20,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:20,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:21,011 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 07:57:21,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:21,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462808694] [2021-06-05 07:57:21,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462808694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:21,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142495664] [2021-06-05 07:57:21,011 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 07:57:21,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:57:21,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:21,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 07:57:21,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:21,184 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 07:57:21,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142495664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:21,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:21,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 07:57:21,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119699051] [2021-06-05 07:57:21,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:57:21,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:21,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:57:21,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:57:21,185 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 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 07:57:21,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:21,492 INFO L93 Difference]: Finished difference Result 3396 states and 8997 transitions. [2021-06-05 07:57:21,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:57:21,492 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 07:57:21,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:21,496 INFO L225 Difference]: With dead ends: 3396 [2021-06-05 07:57:21,496 INFO L226 Difference]: Without dead ends: 3126 [2021-06-05 07:57:21,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 281.3ms TimeCoverageRelationStatistics Valid=413, Invalid=1147, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 07:57:21,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-06-05 07:57:21,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2603. [2021-06-05 07:57:21,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:21,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-05 07:57:21,524 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-05 07:57:21,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:21,524 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-05 07:57:21,524 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 07:57:21,524 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-05 07:57:21,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 07:57:21,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:21,526 INFO L521 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 07:57:21,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 07:57:21,727 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:21,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:21,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1314611933, now seen corresponding path program 58 times [2021-06-05 07:57:21,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:21,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206771022] [2021-06-05 07:57:21,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:21,823 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 07:57:21,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:21,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206771022] [2021-06-05 07:57:21,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206771022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:21,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902544385] [2021-06-05 07:57:21,823 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 07:57:21,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:57:21,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:21,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 07:57:21,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:22,005 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 07:57:22,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902544385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:22,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:22,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 07:57:22,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229561874] [2021-06-05 07:57:22,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:57:22,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:22,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:57:22,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:57:22,007 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 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 07:57:22,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:22,483 INFO L93 Difference]: Finished difference Result 3406 states and 9047 transitions. [2021-06-05 07:57:22,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:57:22,483 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 07:57:22,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:22,486 INFO L225 Difference]: With dead ends: 3406 [2021-06-05 07:57:22,487 INFO L226 Difference]: Without dead ends: 3136 [2021-06-05 07:57:22,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 425.0ms TimeCoverageRelationStatistics Valid=440, Invalid=1282, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 07:57:22,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3136 states. [2021-06-05 07:57:22,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3136 to 2603. [2021-06-05 07:57:22,509 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 07:57:22,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7288 transitions. [2021-06-05 07:57:22,512 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7288 transitions. Word has length 85 [2021-06-05 07:57:22,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:22,512 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7288 transitions. [2021-06-05 07:57:22,512 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 07:57:22,512 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7288 transitions. [2021-06-05 07:57:22,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 07:57:22,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:22,515 INFO L521 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 07:57:22,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:22,718 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:22,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:22,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1947707761, now seen corresponding path program 59 times [2021-06-05 07:57:22,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:22,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474245763] [2021-06-05 07:57:22,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:22,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:22,815 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 07:57:22,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:22,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474245763] [2021-06-05 07:57:22,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474245763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:22,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732140228] [2021-06-05 07:57:22,816 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 07:57:22,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:57:22,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:22,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 07:57:22,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:22,984 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 07:57:22,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732140228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:22,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:22,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 07:57:22,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927350532] [2021-06-05 07:57:22,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:57:22,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:22,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:57:22,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:57:22,985 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 07:57:23,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:23,321 INFO L93 Difference]: Finished difference Result 4148 states and 11171 transitions. [2021-06-05 07:57:23,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:57:23,322 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 07:57:23,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:23,326 INFO L225 Difference]: With dead ends: 4148 [2021-06-05 07:57:23,326 INFO L226 Difference]: Without dead ends: 3878 [2021-06-05 07:57:23,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 303.6ms TimeCoverageRelationStatistics Valid=489, Invalid=1233, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 07:57:23,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3878 states. [2021-06-05 07:57:23,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3878 to 2783. [2021-06-05 07:57:23,354 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 07:57:23,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 7847 transitions. [2021-06-05 07:57:23,357 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 7847 transitions. Word has length 85 [2021-06-05 07:57:23,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:23,357 INFO L482 AbstractCegarLoop]: Abstraction has 2783 states and 7847 transitions. [2021-06-05 07:57:23,358 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 07:57:23,358 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 7847 transitions. [2021-06-05 07:57:23,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 07:57:23,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:23,360 INFO L521 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 07:57:23,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 07:57:23,560 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:23,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:23,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1970051011, now seen corresponding path program 60 times [2021-06-05 07:57:23,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:23,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348241224] [2021-06-05 07:57:23,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:23,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:23,645 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 07:57:23,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:23,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348241224] [2021-06-05 07:57:23,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348241224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:23,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56222248] [2021-06-05 07:57:23,646 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 07:57:23,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:57:23,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:23,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 07:57:23,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:23,817 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 07:57:23,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56222248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:23,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:23,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 07:57:23,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158753323] [2021-06-05 07:57:23,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:57:23,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:23,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:57:23,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:57:23,818 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 07:57:24,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:24,310 INFO L93 Difference]: Finished difference Result 4016 states and 10836 transitions. [2021-06-05 07:57:24,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:57:24,310 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 07:57:24,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:24,314 INFO L225 Difference]: With dead ends: 4016 [2021-06-05 07:57:24,314 INFO L226 Difference]: Without dead ends: 3441 [2021-06-05 07:57:24,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 436.1ms TimeCoverageRelationStatistics Valid=554, Invalid=1608, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:57:24,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3441 states. [2021-06-05 07:57:24,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3441 to 1924. [2021-06-05 07:57:24,335 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 07:57:24,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 5256 transitions. [2021-06-05 07:57:24,338 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 5256 transitions. Word has length 85 [2021-06-05 07:57:24,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:24,338 INFO L482 AbstractCegarLoop]: Abstraction has 1924 states and 5256 transitions. [2021-06-05 07:57:24,338 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 07:57:24,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 5256 transitions. [2021-06-05 07:57:24,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 07:57:24,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:24,340 INFO L521 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 07:57:24,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:24,541 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:24,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:24,541 INFO L82 PathProgramCache]: Analyzing trace with hash 834350121, now seen corresponding path program 61 times [2021-06-05 07:57:24,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:24,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925172433] [2021-06-05 07:57:24,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:24,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:24,676 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 07:57:24,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:24,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925172433] [2021-06-05 07:57:24,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925172433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:24,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490901392] [2021-06-05 07:57:24,677 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 07:57:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:24,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:57:24,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:24,914 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 07:57:24,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490901392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:24,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:24,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 07:57:24,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204277092] [2021-06-05 07:57:24,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:57:24,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:24,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:57:24,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:57:24,916 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 07:57:25,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:25,244 INFO L93 Difference]: Finished difference Result 2864 states and 7456 transitions. [2021-06-05 07:57:25,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:57:25,244 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 07:57:25,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:25,247 INFO L225 Difference]: With dead ends: 2864 [2021-06-05 07:57:25,247 INFO L226 Difference]: Without dead ends: 2530 [2021-06-05 07:57:25,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 335.3ms TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 07:57:25,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-06-05 07:57:25,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2009. [2021-06-05 07:57:25,267 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 07:57:25,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 5426 transitions. [2021-06-05 07:57:25,269 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 5426 transitions. Word has length 90 [2021-06-05 07:57:25,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:25,270 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 5426 transitions. [2021-06-05 07:57:25,270 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 07:57:25,270 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 5426 transitions. [2021-06-05 07:57:25,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 07:57:25,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:25,274 INFO L521 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 07:57:25,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 07:57:25,489 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:25,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:25,489 INFO L82 PathProgramCache]: Analyzing trace with hash -207325971, now seen corresponding path program 62 times [2021-06-05 07:57:25,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:25,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909259078] [2021-06-05 07:57:25,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:25,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:25,619 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 07:57:25,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:25,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909259078] [2021-06-05 07:57:25,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909259078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:25,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048637305] [2021-06-05 07:57:25,619 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 07:57:25,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:57:25,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:25,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 07:57:25,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:25,783 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 07:57:25,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048637305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:25,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:25,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 07:57:25,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866499746] [2021-06-05 07:57:25,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:57:25,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:25,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:57:25,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:57:25,784 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 07:57:26,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:26,005 INFO L93 Difference]: Finished difference Result 3386 states and 8437 transitions. [2021-06-05 07:57:26,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:57:26,005 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 07:57:26,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:26,008 INFO L225 Difference]: With dead ends: 3386 [2021-06-05 07:57:26,008 INFO L226 Difference]: Without dead ends: 3116 [2021-06-05 07:57:26,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 234.7ms TimeCoverageRelationStatistics Valid=260, Invalid=732, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:57:26,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2021-06-05 07:57:26,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 2153. [2021-06-05 07:57:26,029 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 07:57:26,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 5843 transitions. [2021-06-05 07:57:26,031 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 5843 transitions. Word has length 90 [2021-06-05 07:57:26,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:26,032 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 5843 transitions. [2021-06-05 07:57:26,032 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 07:57:26,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 5843 transitions. [2021-06-05 07:57:26,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 07:57:26,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:26,033 INFO L521 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 07:57:26,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-06-05 07:57:26,234 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:26,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:26,234 INFO L82 PathProgramCache]: Analyzing trace with hash -452403267, now seen corresponding path program 63 times [2021-06-05 07:57:26,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:26,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775207492] [2021-06-05 07:57:26,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:26,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:26,359 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 07:57:26,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:26,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775207492] [2021-06-05 07:57:26,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775207492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:26,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647443481] [2021-06-05 07:57:26,359 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 07:57:26,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 07:57:26,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:26,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 07:57:26,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:26,585 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 07:57:26,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647443481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:26,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:26,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 07:57:26,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994720336] [2021-06-05 07:57:26,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:57:26,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:26,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:57:26,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:57:26,586 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 07:57:26,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:26,872 INFO L93 Difference]: Finished difference Result 3346 states and 8432 transitions. [2021-06-05 07:57:26,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:57:26,872 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 07:57:26,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:26,875 INFO L225 Difference]: With dead ends: 3346 [2021-06-05 07:57:26,875 INFO L226 Difference]: Without dead ends: 3076 [2021-06-05 07:57:26,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 285.5ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:57:26,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2021-06-05 07:57:26,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 2228. [2021-06-05 07:57:26,895 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 07:57:26,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 6068 transitions. [2021-06-05 07:57:26,897 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 6068 transitions. Word has length 90 [2021-06-05 07:57:26,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:26,897 INFO L482 AbstractCegarLoop]: Abstraction has 2228 states and 6068 transitions. [2021-06-05 07:57:26,897 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 07:57:26,898 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 6068 transitions. [2021-06-05 07:57:26,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 07:57:26,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:26,899 INFO L521 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 07:57:27,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:27,100 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:27,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:27,100 INFO L82 PathProgramCache]: Analyzing trace with hash -829253589, now seen corresponding path program 64 times [2021-06-05 07:57:27,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:27,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346365615] [2021-06-05 07:57:27,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:27,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:27,217 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 07:57:27,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:27,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346365615] [2021-06-05 07:57:27,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346365615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:27,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068366275] [2021-06-05 07:57:27,218 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 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 07:57:27,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:57:27,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:27,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 07:57:27,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:27,396 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 07:57:27,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068366275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:27,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:27,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 07:57:27,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145138237] [2021-06-05 07:57:27,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:57:27,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:27,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:57:27,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:57:27,398 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 07:57:27,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:27,639 INFO L93 Difference]: Finished difference Result 3396 states and 8607 transitions. [2021-06-05 07:57:27,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:57:27,639 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 07:57:27,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:27,643 INFO L225 Difference]: With dead ends: 3396 [2021-06-05 07:57:27,643 INFO L226 Difference]: Without dead ends: 3126 [2021-06-05 07:57:27,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 241.6ms TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 07:57:27,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-06-05 07:57:27,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2303. [2021-06-05 07:57:27,666 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 07:57:27,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 6293 transitions. [2021-06-05 07:57:27,669 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 6293 transitions. Word has length 90 [2021-06-05 07:57:27,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:27,669 INFO L482 AbstractCegarLoop]: Abstraction has 2303 states and 6293 transitions. [2021-06-05 07:57:27,669 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 07:57:27,669 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 6293 transitions. [2021-06-05 07:57:27,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 07:57:27,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:27,671 INFO L521 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 07:57:27,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:27,872 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:27,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:27,872 INFO L82 PathProgramCache]: Analyzing trace with hash 497501947, now seen corresponding path program 65 times [2021-06-05 07:57:27,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:27,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270398153] [2021-06-05 07:57:27,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:28,002 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 07:57:28,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:28,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270398153] [2021-06-05 07:57:28,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270398153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:28,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096146582] [2021-06-05 07:57:28,002 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 07:57:28,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 07:57:28,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:28,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 07:57:28,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:28,171 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 07:57:28,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096146582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:28,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:28,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 07:57:28,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701149288] [2021-06-05 07:57:28,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:57:28,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:28,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:57:28,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:57:28,172 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 07:57:28,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:28,513 INFO L93 Difference]: Finished difference Result 3421 states and 8732 transitions. [2021-06-05 07:57:28,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:57:28,513 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 07:57:28,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:28,517 INFO L225 Difference]: With dead ends: 3421 [2021-06-05 07:57:28,517 INFO L226 Difference]: Without dead ends: 3151 [2021-06-05 07:57:28,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 323.7ms TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 07:57:28,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-06-05 07:57:28,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2378. [2021-06-05 07:57:28,540 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 07:57:28,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6518 transitions. [2021-06-05 07:57:28,543 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6518 transitions. Word has length 90 [2021-06-05 07:57:28,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:28,543 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6518 transitions. [2021-06-05 07:57:28,544 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 07:57:28,544 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6518 transitions. [2021-06-05 07:57:28,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 07:57:28,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:28,546 INFO L521 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 07:57:28,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 07:57:28,761 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:28,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:28,761 INFO L82 PathProgramCache]: Analyzing trace with hash 951718121, now seen corresponding path program 66 times [2021-06-05 07:57:28,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:28,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485259310] [2021-06-05 07:57:28,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:28,887 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 07:57:28,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:28,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485259310] [2021-06-05 07:57:28,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485259310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:28,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030015195] [2021-06-05 07:57:28,887 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 07:57:28,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 07:57:28,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:28,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 07:57:28,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:29,043 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 07:57:29,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030015195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:29,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:29,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 07:57:29,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649631895] [2021-06-05 07:57:29,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:57:29,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:29,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:57:29,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:57:29,045 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 07:57:29,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:29,330 INFO L93 Difference]: Finished difference Result 3446 states and 8857 transitions. [2021-06-05 07:57:29,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:57:29,331 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 07:57:29,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:29,334 INFO L225 Difference]: With dead ends: 3446 [2021-06-05 07:57:29,334 INFO L226 Difference]: Without dead ends: 3176 [2021-06-05 07:57:29,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 257.5ms TimeCoverageRelationStatistics Valid=302, Invalid=958, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:57:29,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-06-05 07:57:29,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2453. [2021-06-05 07:57:29,361 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 07:57:29,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 6743 transitions. [2021-06-05 07:57:29,365 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 6743 transitions. Word has length 90 [2021-06-05 07:57:29,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:29,365 INFO L482 AbstractCegarLoop]: Abstraction has 2453 states and 6743 transitions. [2021-06-05 07:57:29,365 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 07:57:29,365 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 6743 transitions. [2021-06-05 07:57:29,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 07:57:29,367 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:29,367 INFO L521 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 07:57:29,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:29,568 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:29,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:29,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1950614457, now seen corresponding path program 67 times [2021-06-05 07:57:29,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:29,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664162334] [2021-06-05 07:57:29,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:29,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:29,702 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 07:57:29,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:29,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664162334] [2021-06-05 07:57:29,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664162334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:29,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221610084] [2021-06-05 07:57:29,702 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 07:57:29,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:29,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 07:57:29,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:29,862 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 07:57:29,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221610084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:29,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:29,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 07:57:29,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444350768] [2021-06-05 07:57:29,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:57:29,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:29,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:57:29,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:57:29,864 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 07:57:30,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:30,246 INFO L93 Difference]: Finished difference Result 3471 states and 8982 transitions. [2021-06-05 07:57:30,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:57:30,247 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 07:57:30,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:30,250 INFO L225 Difference]: With dead ends: 3471 [2021-06-05 07:57:30,250 INFO L226 Difference]: Without dead ends: 3201 [2021-06-05 07:57:30,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 376.8ms TimeCoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 07:57:30,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2021-06-05 07:57:30,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 2528. [2021-06-05 07:57:30,272 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 07:57:30,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 6968 transitions. [2021-06-05 07:57:30,275 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 6968 transitions. Word has length 90 [2021-06-05 07:57:30,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:30,276 INFO L482 AbstractCegarLoop]: Abstraction has 2528 states and 6968 transitions. [2021-06-05 07:57:30,276 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 07:57:30,276 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 6968 transitions. [2021-06-05 07:57:30,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 07:57:30,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:30,278 INFO L521 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 07:57:30,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 07:57:30,478 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:30,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:30,479 INFO L82 PathProgramCache]: Analyzing trace with hash 71286567, now seen corresponding path program 68 times [2021-06-05 07:57:30,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:30,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243938322] [2021-06-05 07:57:30,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:30,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:30,585 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 07:57:30,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:30,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243938322] [2021-06-05 07:57:30,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243938322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:30,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019371467] [2021-06-05 07:57:30,613 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 07:57:30,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:57:30,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:30,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 07:57:30,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:30,777 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 07:57:30,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019371467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:30,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:30,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 07:57:30,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773687919] [2021-06-05 07:57:30,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:57:30,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:30,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:57:30,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:57:30,778 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 07:57:31,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:31,096 INFO L93 Difference]: Finished difference Result 3496 states and 9107 transitions. [2021-06-05 07:57:31,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:57:31,096 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 07:57:31,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:31,100 INFO L225 Difference]: With dead ends: 3496 [2021-06-05 07:57:31,100 INFO L226 Difference]: Without dead ends: 3226 [2021-06-05 07:57:31,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 275.7ms TimeCoverageRelationStatistics Valid=347, Invalid=1059, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 07:57:31,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-06-05 07:57:31,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 2603. [2021-06-05 07:57:31,125 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 07:57:31,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7193 transitions. [2021-06-05 07:57:31,128 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7193 transitions. Word has length 90 [2021-06-05 07:57:31,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:31,129 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7193 transitions. [2021-06-05 07:57:31,129 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 07:57:31,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7193 transitions. [2021-06-05 07:57:31,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 07:57:31,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:31,131 INFO L521 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 07:57:31,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:31,332 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:31,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:31,332 INFO L82 PathProgramCache]: Analyzing trace with hash 2101605879, now seen corresponding path program 69 times [2021-06-05 07:57:31,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:31,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272239351] [2021-06-05 07:57:31,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:31,434 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 07:57:31,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:31,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272239351] [2021-06-05 07:57:31,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272239351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:31,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066009578] [2021-06-05 07:57:31,435 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 07:57:31,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 07:57:31,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:31,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 07:57:31,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:31,620 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 07:57:31,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066009578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:31,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:31,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 07:57:31,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547906561] [2021-06-05 07:57:31,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:57:31,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:31,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:57:31,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:57:31,622 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 07:57:32,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:32,042 INFO L93 Difference]: Finished difference Result 3521 states and 9232 transitions. [2021-06-05 07:57:32,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:57:32,042 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 07:57:32,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:32,046 INFO L225 Difference]: With dead ends: 3521 [2021-06-05 07:57:32,046 INFO L226 Difference]: Without dead ends: 3251 [2021-06-05 07:57:32,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 389.3ms TimeCoverageRelationStatistics Valid=422, Invalid=1300, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 07:57:32,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3251 states. [2021-06-05 07:57:32,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3251 to 2678. [2021-06-05 07:57:32,072 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 07:57:32,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 7418 transitions. [2021-06-05 07:57:32,075 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 7418 transitions. Word has length 90 [2021-06-05 07:57:32,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:32,076 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 7418 transitions. [2021-06-05 07:57:32,076 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 07:57:32,076 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 7418 transitions. [2021-06-05 07:57:32,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 07:57:32,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:32,078 INFO L521 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 07:57:32,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 07:57:32,281 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:32,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:32,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1579121947, now seen corresponding path program 70 times [2021-06-05 07:57:32,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:32,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260425972] [2021-06-05 07:57:32,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:32,374 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 07:57:32,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:32,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260425972] [2021-06-05 07:57:32,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260425972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:32,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276062884] [2021-06-05 07:57:32,374 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 07:57:32,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:57:32,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:32,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 07:57:32,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:32,548 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 07:57:32,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276062884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:32,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:32,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 07:57:32,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051605242] [2021-06-05 07:57:32,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:57:32,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:32,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:57:32,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:57:32,549 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 07:57:32,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:32,860 INFO L93 Difference]: Finished difference Result 3591 states and 9477 transitions. [2021-06-05 07:57:32,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:57:32,860 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 07:57:32,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:32,864 INFO L225 Difference]: With dead ends: 3591 [2021-06-05 07:57:32,864 INFO L226 Difference]: Without dead ends: 3321 [2021-06-05 07:57:32,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 283.9ms TimeCoverageRelationStatistics Valid=408, Invalid=1152, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 07:57:32,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3321 states. [2021-06-05 07:57:32,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3321 to 2753. [2021-06-05 07:57:32,890 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 07:57:32,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7658 transitions. [2021-06-05 07:57:32,893 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7658 transitions. Word has length 90 [2021-06-05 07:57:32,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:32,894 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7658 transitions. [2021-06-05 07:57:32,894 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 07:57:32,894 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7658 transitions. [2021-06-05 07:57:32,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 07:57:32,896 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:32,896 INFO L521 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 07:57:33,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:33,096 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:33,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:33,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1000603061, now seen corresponding path program 71 times [2021-06-05 07:57:33,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:33,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942416578] [2021-06-05 07:57:33,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:33,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:33,197 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 07:57:33,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:33,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942416578] [2021-06-05 07:57:33,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942416578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:33,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536036470] [2021-06-05 07:57:33,197 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 07:57:33,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 07:57:33,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:33,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 07:57:33,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:33,357 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 07:57:33,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536036470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:33,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:33,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 07:57:33,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862429602] [2021-06-05 07:57:33,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:57:33,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:33,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:57:33,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:57:33,358 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 07:57:33,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:33,840 INFO L93 Difference]: Finished difference Result 4169 states and 11103 transitions. [2021-06-05 07:57:33,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:57:33,840 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 07:57:33,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:33,844 INFO L225 Difference]: With dead ends: 4169 [2021-06-05 07:57:33,844 INFO L226 Difference]: Without dead ends: 3546 [2021-06-05 07:57:33,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 423.9ms TimeCoverageRelationStatistics Valid=512, Invalid=1558, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:57:33,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3546 states. [2021-06-05 07:57:33,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3546 to 2828. [2021-06-05 07:57:33,873 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 07:57:33,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7888 transitions. [2021-06-05 07:57:33,877 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7888 transitions. Word has length 90 [2021-06-05 07:57:33,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:33,877 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7888 transitions. [2021-06-05 07:57:33,877 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 07:57:33,877 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7888 transitions. [2021-06-05 07:57:33,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 07:57:33,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:33,880 INFO L521 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 07:57:34,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 07:57:34,081 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:34,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:34,081 INFO L82 PathProgramCache]: Analyzing trace with hash -32044541, now seen corresponding path program 72 times [2021-06-05 07:57:34,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:34,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878613864] [2021-06-05 07:57:34,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:34,198 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 07:57:34,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:34,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878613864] [2021-06-05 07:57:34,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878613864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:34,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209579088] [2021-06-05 07:57:34,198 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 07:57:34,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 07:57:34,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:34,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 07:57:34,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:34,358 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 07:57:34,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209579088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:34,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:34,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 07:57:34,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414438512] [2021-06-05 07:57:34,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:57:34,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:34,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:57:34,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:57:34,360 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 07:57:34,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:34,707 INFO L93 Difference]: Finished difference Result 4398 states and 11821 transitions. [2021-06-05 07:57:34,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:57:34,707 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 07:57:34,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:34,711 INFO L225 Difference]: With dead ends: 4398 [2021-06-05 07:57:34,711 INFO L226 Difference]: Without dead ends: 4128 [2021-06-05 07:57:34,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 334.6ms TimeCoverageRelationStatistics Valid=486, Invalid=1236, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 07:57:34,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4128 states. [2021-06-05 07:57:34,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4128 to 3008. [2021-06-05 07:57:34,741 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 07:57:34,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 8447 transitions. [2021-06-05 07:57:34,745 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 8447 transitions. Word has length 90 [2021-06-05 07:57:34,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:34,745 INFO L482 AbstractCegarLoop]: Abstraction has 3008 states and 8447 transitions. [2021-06-05 07:57:34,745 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 07:57:34,745 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 8447 transitions. [2021-06-05 07:57:34,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 07:57:34,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:34,748 INFO L521 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 07:57:34,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:34,953 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:34,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:34,953 INFO L82 PathProgramCache]: Analyzing trace with hash -9701291, now seen corresponding path program 73 times [2021-06-05 07:57:34,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:34,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478636306] [2021-06-05 07:57:34,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:34,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:35,046 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 07:57:35,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:35,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478636306] [2021-06-05 07:57:35,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478636306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:35,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868749225] [2021-06-05 07:57:35,046 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 07:57:35,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:35,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 07:57:35,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:35,216 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 07:57:35,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868749225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:35,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:35,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 07:57:35,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844698769] [2021-06-05 07:57:35,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:57:35,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:35,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:57:35,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:57:35,217 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 07:57:35,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:35,733 INFO L93 Difference]: Finished difference Result 3885 states and 10521 transitions. [2021-06-05 07:57:35,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:57:35,733 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 07:57:35,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:35,737 INFO L225 Difference]: With dead ends: 3885 [2021-06-05 07:57:35,737 INFO L226 Difference]: Without dead ends: 3306 [2021-06-05 07:57:35,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 462.4ms TimeCoverageRelationStatistics Valid=579, Invalid=1491, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:57:35,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2021-06-05 07:57:35,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 2113. [2021-06-05 07:57:35,757 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 07:57:35,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 5778 transitions. [2021-06-05 07:57:35,760 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 5778 transitions. Word has length 90 [2021-06-05 07:57:35,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:35,760 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 5778 transitions. [2021-06-05 07:57:35,760 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 07:57:35,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 5778 transitions. [2021-06-05 07:57:35,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 07:57:35,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:35,762 INFO L521 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 07:57:35,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:35,962 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:35,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:35,963 INFO L82 PathProgramCache]: Analyzing trace with hash -567911574, now seen corresponding path program 74 times [2021-06-05 07:57:35,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:35,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789677556] [2021-06-05 07:57:35,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:35,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:36,113 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 07:57:36,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:36,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789677556] [2021-06-05 07:57:36,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789677556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:36,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501440471] [2021-06-05 07:57:36,114 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 07:57:36,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:57:36,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:36,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:57:36,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:36,301 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 07:57:36,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501440471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:36,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:36,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 07:57:36,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792275918] [2021-06-05 07:57:36,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:57:36,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:36,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:57:36,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:57:36,302 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 07:57:36,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:36,574 INFO L93 Difference]: Finished difference Result 3131 states and 8017 transitions. [2021-06-05 07:57:36,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:57:36,574 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 07:57:36,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:36,577 INFO L225 Difference]: With dead ends: 3131 [2021-06-05 07:57:36,578 INFO L226 Difference]: Without dead ends: 2861 [2021-06-05 07:57:36,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 285.1ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:57:36,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2021-06-05 07:57:36,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2188. [2021-06-05 07:57:36,602 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 07:57:36,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 6003 transitions. [2021-06-05 07:57:36,604 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 6003 transitions. Word has length 95 [2021-06-05 07:57:36,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:36,605 INFO L482 AbstractCegarLoop]: Abstraction has 2188 states and 6003 transitions. [2021-06-05 07:57:36,605 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 07:57:36,605 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 6003 transitions. [2021-06-05 07:57:36,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 07:57:36,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:36,606 INFO L521 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 07:57:36,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:36,807 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:36,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:36,807 INFO L82 PathProgramCache]: Analyzing trace with hash -812988870, now seen corresponding path program 75 times [2021-06-05 07:57:36,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:36,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429006150] [2021-06-05 07:57:36,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:36,939 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 07:57:36,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:36,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429006150] [2021-06-05 07:57:36,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429006150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:36,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597236941] [2021-06-05 07:57:36,940 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 07:57:37,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 07:57:37,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:37,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:57:37,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:37,124 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 07:57:37,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597236941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:37,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:37,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 07:57:37,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721623504] [2021-06-05 07:57:37,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:57:37,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:37,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:57:37,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:57:37,125 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 07:57:37,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:37,442 INFO L93 Difference]: Finished difference Result 3451 states and 8732 transitions. [2021-06-05 07:57:37,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:57:37,442 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 07:57:37,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:37,445 INFO L225 Difference]: With dead ends: 3451 [2021-06-05 07:57:37,445 INFO L226 Difference]: Without dead ends: 3181 [2021-06-05 07:57:37,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 317.8ms TimeCoverageRelationStatistics Valid=355, Invalid=1127, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:57:37,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3181 states. [2021-06-05 07:57:37,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3181 to 2263. [2021-06-05 07:57:37,465 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 07:57:37,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6228 transitions. [2021-06-05 07:57:37,468 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6228 transitions. Word has length 95 [2021-06-05 07:57:37,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:37,468 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6228 transitions. [2021-06-05 07:57:37,468 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 07:57:37,468 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6228 transitions. [2021-06-05 07:57:37,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 07:57:37,470 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:37,470 INFO L521 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 07:57:37,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:37,671 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:37,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:37,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1189839192, now seen corresponding path program 76 times [2021-06-05 07:57:37,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:37,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525595085] [2021-06-05 07:57:37,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:37,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:37,794 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 07:57:37,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:37,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525595085] [2021-06-05 07:57:37,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525595085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:37,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129516335] [2021-06-05 07:57:37,795 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 07:57:37,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:57:37,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:37,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:57:37,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:37,974 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 07:57:37,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129516335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:37,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:37,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 07:57:37,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552293767] [2021-06-05 07:57:37,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:57:37,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:37,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:57:37,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:57:37,975 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 07:57:38,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:38,247 INFO L93 Difference]: Finished difference Result 3481 states and 8867 transitions. [2021-06-05 07:57:38,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:57:38,248 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 07:57:38,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:38,251 INFO L225 Difference]: With dead ends: 3481 [2021-06-05 07:57:38,251 INFO L226 Difference]: Without dead ends: 3211 [2021-06-05 07:57:38,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 271.2ms TimeCoverageRelationStatistics Valid=361, Invalid=1121, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:57:38,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2021-06-05 07:57:38,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 2338. [2021-06-05 07:57:38,276 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 07:57:38,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 6453 transitions. [2021-06-05 07:57:38,279 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 6453 transitions. Word has length 95 [2021-06-05 07:57:38,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:38,279 INFO L482 AbstractCegarLoop]: Abstraction has 2338 states and 6453 transitions. [2021-06-05 07:57:38,279 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 07:57:38,279 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 6453 transitions. [2021-06-05 07:57:38,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 07:57:38,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:38,281 INFO L521 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 07:57:38,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:38,482 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:38,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:38,482 INFO L82 PathProgramCache]: Analyzing trace with hash 136916344, now seen corresponding path program 77 times [2021-06-05 07:57:38,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:38,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085618732] [2021-06-05 07:57:38,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:38,603 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 07:57:38,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:38,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085618732] [2021-06-05 07:57:38,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085618732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:38,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141517274] [2021-06-05 07:57:38,604 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 07:57:38,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 07:57:38,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:38,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:57:38,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:38,771 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 07:57:38,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141517274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:38,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:38,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 07:57:38,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816140876] [2021-06-05 07:57:38,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:57:38,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:38,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:57:38,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:57:38,773 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 07:57:39,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:39,110 INFO L93 Difference]: Finished difference Result 3506 states and 8992 transitions. [2021-06-05 07:57:39,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:57:39,111 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 07:57:39,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:39,114 INFO L225 Difference]: With dead ends: 3506 [2021-06-05 07:57:39,114 INFO L226 Difference]: Without dead ends: 3236 [2021-06-05 07:57:39,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 334.7ms TimeCoverageRelationStatistics Valid=383, Invalid=1257, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:57:39,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-06-05 07:57:39,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 2413. [2021-06-05 07:57:39,137 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 07:57:39,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 6678 transitions. [2021-06-05 07:57:39,140 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 6678 transitions. Word has length 95 [2021-06-05 07:57:39,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:39,141 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 6678 transitions. [2021-06-05 07:57:39,141 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 07:57:39,141 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 6678 transitions. [2021-06-05 07:57:39,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 07:57:39,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:39,143 INFO L521 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 07:57:39,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:39,343 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:39,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:39,344 INFO L82 PathProgramCache]: Analyzing trace with hash 591132518, now seen corresponding path program 78 times [2021-06-05 07:57:39,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:39,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222259891] [2021-06-05 07:57:39,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:39,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:39,458 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 07:57:39,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:39,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222259891] [2021-06-05 07:57:39,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222259891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:39,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632545238] [2021-06-05 07:57:39,458 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 07:57:39,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 07:57:39,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:39,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:57:39,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:39,630 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 07:57:39,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632545238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:39,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:39,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 07:57:39,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269811706] [2021-06-05 07:57:39,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:57:39,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:39,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:57:39,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:57:39,631 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 07:57:39,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:39,937 INFO L93 Difference]: Finished difference Result 3531 states and 9117 transitions. [2021-06-05 07:57:39,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:57:39,938 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 07:57:39,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:39,941 INFO L225 Difference]: With dead ends: 3531 [2021-06-05 07:57:39,941 INFO L226 Difference]: Without dead ends: 3261 [2021-06-05 07:57:39,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 289.1ms TimeCoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:57:39,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3261 states. [2021-06-05 07:57:39,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3261 to 2488. [2021-06-05 07:57:39,965 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 07:57:39,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6903 transitions. [2021-06-05 07:57:39,968 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6903 transitions. Word has length 95 [2021-06-05 07:57:39,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:39,968 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6903 transitions. [2021-06-05 07:57:39,968 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 07:57:39,968 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6903 transitions. [2021-06-05 07:57:39,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 07:57:39,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:39,970 INFO L521 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 07:57:40,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:40,171 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:40,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:40,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1590028854, now seen corresponding path program 79 times [2021-06-05 07:57:40,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:40,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276622498] [2021-06-05 07:57:40,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:40,290 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 07:57:40,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:40,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276622498] [2021-06-05 07:57:40,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276622498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:40,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434329037] [2021-06-05 07:57:40,291 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 07:57:40,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:40,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:57:40,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:40,473 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 07:57:40,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434329037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:40,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:40,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 07:57:40,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334435244] [2021-06-05 07:57:40,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:57:40,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:40,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:57:40,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:57:40,475 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 07:57:40,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:40,884 INFO L93 Difference]: Finished difference Result 3556 states and 9242 transitions. [2021-06-05 07:57:40,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:57:40,884 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 07:57:40,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:40,888 INFO L225 Difference]: With dead ends: 3556 [2021-06-05 07:57:40,888 INFO L226 Difference]: Without dead ends: 3286 [2021-06-05 07:57:40,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 387.3ms TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:57:40,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2021-06-05 07:57:40,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 2563. [2021-06-05 07:57:40,912 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 07:57:40,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7128 transitions. [2021-06-05 07:57:40,915 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7128 transitions. Word has length 95 [2021-06-05 07:57:40,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:40,916 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7128 transitions. [2021-06-05 07:57:40,916 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 07:57:40,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7128 transitions. [2021-06-05 07:57:40,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 07:57:40,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:40,918 INFO L521 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 07:57:41,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 07:57:41,118 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:41,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:41,118 INFO L82 PathProgramCache]: Analyzing trace with hash -289299036, now seen corresponding path program 80 times [2021-06-05 07:57:41,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:41,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374794725] [2021-06-05 07:57:41,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:41,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:41,228 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 07:57:41,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:41,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374794725] [2021-06-05 07:57:41,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374794725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:41,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033158827] [2021-06-05 07:57:41,229 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 07:57:41,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:57:41,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:41,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:57:41,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:41,418 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 07:57:41,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033158827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:41,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:41,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 07:57:41,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927068130] [2021-06-05 07:57:41,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:57:41,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:41,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:57:41,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:57:41,419 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 07:57:41,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:41,767 INFO L93 Difference]: Finished difference Result 3581 states and 9367 transitions. [2021-06-05 07:57:41,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:57:41,767 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 07:57:41,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:41,770 INFO L225 Difference]: With dead ends: 3581 [2021-06-05 07:57:41,770 INFO L226 Difference]: Without dead ends: 3311 [2021-06-05 07:57:41,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 316.6ms TimeCoverageRelationStatistics Valid=461, Invalid=1345, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:57:41,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3311 states. [2021-06-05 07:57:41,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3311 to 2638. [2021-06-05 07:57:41,796 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 07:57:41,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 7353 transitions. [2021-06-05 07:57:41,799 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 7353 transitions. Word has length 95 [2021-06-05 07:57:41,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:41,799 INFO L482 AbstractCegarLoop]: Abstraction has 2638 states and 7353 transitions. [2021-06-05 07:57:41,800 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 07:57:41,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 7353 transitions. [2021-06-05 07:57:41,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 07:57:41,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:41,802 INFO L521 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 07:57:42,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:42,002 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:42,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:42,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1741020276, now seen corresponding path program 81 times [2021-06-05 07:57:42,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:42,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244896147] [2021-06-05 07:57:42,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:42,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:42,118 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 07:57:42,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:42,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244896147] [2021-06-05 07:57:42,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244896147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:42,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924010213] [2021-06-05 07:57:42,118 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 07:57:42,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 07:57:42,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:42,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:57:42,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:42,290 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 07:57:42,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924010213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:42,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:42,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 07:57:42,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203384960] [2021-06-05 07:57:42,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:57:42,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:42,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:57:42,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:57:42,291 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 07:57:42,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:42,712 INFO L93 Difference]: Finished difference Result 3606 states and 9492 transitions. [2021-06-05 07:57:42,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:57:42,712 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 07:57:42,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:42,716 INFO L225 Difference]: With dead ends: 3606 [2021-06-05 07:57:42,716 INFO L226 Difference]: Without dead ends: 3336 [2021-06-05 07:57:42,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 390.4ms TimeCoverageRelationStatistics Valid=487, Invalid=1493, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:57:42,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-06-05 07:57:42,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2713. [2021-06-05 07:57:42,739 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 07:57:42,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7578 transitions. [2021-06-05 07:57:42,742 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7578 transitions. Word has length 95 [2021-06-05 07:57:42,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:42,743 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7578 transitions. [2021-06-05 07:57:42,743 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 07:57:42,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7578 transitions. [2021-06-05 07:57:42,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 07:57:42,745 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:42,745 INFO L521 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 07:57:42,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 07:57:42,946 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:42,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:42,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1939707550, now seen corresponding path program 82 times [2021-06-05 07:57:42,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:42,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317375772] [2021-06-05 07:57:42,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:43,071 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 07:57:43,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:43,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317375772] [2021-06-05 07:57:43,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317375772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:43,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673902087] [2021-06-05 07:57:43,071 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 07:57:43,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:57:43,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:43,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:57:43,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:43,245 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 07:57:43,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673902087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:43,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:43,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 07:57:43,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66477080] [2021-06-05 07:57:43,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:57:43,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:43,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:57:43,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:57:43,246 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 07:57:43,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:43,609 INFO L93 Difference]: Finished difference Result 3631 states and 9617 transitions. [2021-06-05 07:57:43,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:57:43,609 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 07:57:43,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:43,613 INFO L225 Difference]: With dead ends: 3631 [2021-06-05 07:57:43,613 INFO L226 Difference]: Without dead ends: 3361 [2021-06-05 07:57:43,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 349.3ms TimeCoverageRelationStatistics Valid=535, Invalid=1445, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:57:43,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3361 states. [2021-06-05 07:57:43,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3361 to 2788. [2021-06-05 07:57:43,641 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 07:57:43,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7803 transitions. [2021-06-05 07:57:43,645 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7803 transitions. Word has length 95 [2021-06-05 07:57:43,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:43,645 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7803 transitions. [2021-06-05 07:57:43,645 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 07:57:43,646 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7803 transitions. [2021-06-05 07:57:43,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 07:57:43,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:43,648 INFO L521 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 07:57:43,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:43,848 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:43,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:43,848 INFO L82 PathProgramCache]: Analyzing trace with hash 640017458, now seen corresponding path program 83 times [2021-06-05 07:57:43,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:43,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890525746] [2021-06-05 07:57:43,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:43,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:43,961 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 07:57:43,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:43,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890525746] [2021-06-05 07:57:43,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890525746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:43,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524663760] [2021-06-05 07:57:43,962 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 07:57:44,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 07:57:44,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:44,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:57:44,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:44,153 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 07:57:44,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524663760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:44,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:44,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 07:57:44,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627426090] [2021-06-05 07:57:44,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:57:44,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:44,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:57:44,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:57:44,154 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 07:57:44,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:44,673 INFO L93 Difference]: Finished difference Result 3716 states and 9907 transitions. [2021-06-05 07:57:44,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:57:44,673 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 07:57:44,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:44,676 INFO L225 Difference]: With dead ends: 3716 [2021-06-05 07:57:44,676 INFO L226 Difference]: Without dead ends: 3446 [2021-06-05 07:57:44,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 471.7ms TimeCoverageRelationStatistics Valid=563, Invalid=1599, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:57:44,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2021-06-05 07:57:44,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2863. [2021-06-05 07:57:44,701 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 07:57:44,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 8048 transitions. [2021-06-05 07:57:44,724 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 8048 transitions. Word has length 95 [2021-06-05 07:57:44,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:44,724 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 8048 transitions. [2021-06-05 07:57:44,724 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 07:57:44,724 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 8048 transitions. [2021-06-05 07:57:44,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 07:57:44,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:44,726 INFO L521 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 07:57:44,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:44,929 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:44,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:44,930 INFO L82 PathProgramCache]: Analyzing trace with hash -392630144, now seen corresponding path program 84 times [2021-06-05 07:57:44,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:44,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203771067] [2021-06-05 07:57:44,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:44,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:45,028 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 07:57:45,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:45,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203771067] [2021-06-05 07:57:45,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203771067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:45,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578740402] [2021-06-05 07:57:45,029 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 07:57:45,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 07:57:45,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:45,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:57:45,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:45,193 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 07:57:45,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578740402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:45,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:45,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 07:57:45,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775749609] [2021-06-05 07:57:45,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:57:45,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:45,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:57:45,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:57:45,195 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 07:57:45,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:45,619 INFO L93 Difference]: Finished difference Result 4458 states and 12031 transitions. [2021-06-05 07:57:45,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:57:45,619 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 07:57:45,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:45,623 INFO L225 Difference]: With dead ends: 4458 [2021-06-05 07:57:45,623 INFO L226 Difference]: Without dead ends: 4188 [2021-06-05 07:57:45,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 372.7ms TimeCoverageRelationStatistics Valid=626, Invalid=1536, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:57:45,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2021-06-05 07:57:45,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 3043. [2021-06-05 07:57:45,649 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 07:57:45,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 8607 transitions. [2021-06-05 07:57:45,652 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 8607 transitions. Word has length 95 [2021-06-05 07:57:45,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:45,653 INFO L482 AbstractCegarLoop]: Abstraction has 3043 states and 8607 transitions. [2021-06-05 07:57:45,653 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 07:57:45,653 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 8607 transitions. [2021-06-05 07:57:45,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 07:57:45,655 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:45,655 INFO L521 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 07:57:45,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:45,855 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:45,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:45,855 INFO L82 PathProgramCache]: Analyzing trace with hash -370286894, now seen corresponding path program 85 times [2021-06-05 07:57:45,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:45,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697565255] [2021-06-05 07:57:45,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:45,959 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 07:57:45,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:45,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697565255] [2021-06-05 07:57:45,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697565255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:45,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931437972] [2021-06-05 07:57:45,959 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 07:57:46,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:46,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:57:46,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:46,120 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 07:57:46,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931437972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:46,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:46,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 07:57:46,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722230110] [2021-06-05 07:57:46,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:57:46,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:46,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:57:46,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:57:46,121 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 07:57:46,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:46,633 INFO L93 Difference]: Finished difference Result 3920 states and 10681 transitions. [2021-06-05 07:57:46,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:57:46,633 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 07:57:46,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:46,636 INFO L225 Difference]: With dead ends: 3920 [2021-06-05 07:57:46,636 INFO L226 Difference]: Without dead ends: 3431 [2021-06-05 07:57:46,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 474.7ms TimeCoverageRelationStatistics Valid=658, Invalid=1694, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:57:46,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3431 states. [2021-06-05 07:57:46,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3431 to 2034. [2021-06-05 07:57:46,655 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 07:57:46,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 5566 transitions. [2021-06-05 07:57:46,658 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 5566 transitions. Word has length 95 [2021-06-05 07:57:46,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:46,658 INFO L482 AbstractCegarLoop]: Abstraction has 2034 states and 5566 transitions. [2021-06-05 07:57:46,658 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 07:57:46,658 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 5566 transitions. [2021-06-05 07:57:46,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 07:57:46,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:46,659 INFO L521 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 07:57:46,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:46,860 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:46,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:46,860 INFO L82 PathProgramCache]: Analyzing trace with hash -2121147398, now seen corresponding path program 86 times [2021-06-05 07:57:46,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:46,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890003571] [2021-06-05 07:57:46,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:46,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:47,003 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 07:57:47,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:47,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890003571] [2021-06-05 07:57:47,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890003571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:47,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090745319] [2021-06-05 07:57:47,004 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 07:57:47,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:57:47,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:47,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:57:47,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:47,202 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 07:57:47,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090745319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:47,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:47,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 23 [2021-06-05 07:57:47,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681693946] [2021-06-05 07:57:47,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:57:47,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:47,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:57:47,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:57:47,203 INFO L87 Difference]: Start difference. First operand 2034 states and 5566 transitions. Second operand has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 23 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 07:57:47,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:47,512 INFO L93 Difference]: Finished difference Result 3024 states and 7866 transitions. [2021-06-05 07:57:47,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:57:47,512 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 23 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 100 [2021-06-05 07:57:47,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:47,515 INFO L225 Difference]: With dead ends: 3024 [2021-06-05 07:57:47,515 INFO L226 Difference]: Without dead ends: 2690 [2021-06-05 07:57:47,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 346.7ms TimeCoverageRelationStatistics Valid=474, Invalid=1332, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:57:47,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2021-06-05 07:57:47,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 2119. [2021-06-05 07:57:47,533 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 07:57:47,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 5736 transitions. [2021-06-05 07:57:47,535 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 5736 transitions. Word has length 100 [2021-06-05 07:57:47,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:47,535 INFO L482 AbstractCegarLoop]: Abstraction has 2119 states and 5736 transitions. [2021-06-05 07:57:47,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 23 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 07:57:47,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 5736 transitions. [2021-06-05 07:57:47,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 07:57:47,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:47,537 INFO L521 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 07:57:47,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:47,738 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:47,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:47,738 INFO L82 PathProgramCache]: Analyzing trace with hash 93978558, now seen corresponding path program 87 times [2021-06-05 07:57:47,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:47,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830810886] [2021-06-05 07:57:47,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:47,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:47,874 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 07:57:47,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:47,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830810886] [2021-06-05 07:57:47,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830810886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:47,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429667973] [2021-06-05 07:57:47,875 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 07:57:47,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 07:57:47,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:47,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:57:47,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:48,056 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 07:57:48,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429667973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:48,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:48,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 07:57:48,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641062788] [2021-06-05 07:57:48,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:57:48,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:48,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:57:48,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:57:48,057 INFO L87 Difference]: Start difference. First operand 2119 states and 5736 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 07:57:48,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:48,311 INFO L93 Difference]: Finished difference Result 3646 states and 9047 transitions. [2021-06-05 07:57:48,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:57:48,312 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 07:57:48,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:48,315 INFO L225 Difference]: With dead ends: 3646 [2021-06-05 07:57:48,315 INFO L226 Difference]: Without dead ends: 3376 [2021-06-05 07:57:48,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 291.2ms TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:57:48,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2021-06-05 07:57:48,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 2263. [2021-06-05 07:57:48,336 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 07:57:48,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6153 transitions. [2021-06-05 07:57:48,339 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6153 transitions. Word has length 100 [2021-06-05 07:57:48,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:48,339 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6153 transitions. [2021-06-05 07:57:48,339 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 07:57:48,339 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6153 transitions. [2021-06-05 07:57:48,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 07:57:48,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:48,341 INFO L521 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 07:57:48,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:48,551 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:48,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:48,552 INFO L82 PathProgramCache]: Analyzing trace with hash 903030414, now seen corresponding path program 88 times [2021-06-05 07:57:48,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:48,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069414043] [2021-06-05 07:57:48,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:48,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:48,702 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 07:57:48,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:48,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069414043] [2021-06-05 07:57:48,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069414043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:48,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364429732] [2021-06-05 07:57:48,702 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 07:57:48,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:57:48,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:48,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:57:48,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:48,904 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 07:57:48,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364429732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:48,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:48,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 07:57:48,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781185878] [2021-06-05 07:57:48,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:57:48,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:48,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:57:48,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:57:48,905 INFO L87 Difference]: Start difference. First operand 2263 states and 6153 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:49,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:49,209 INFO L93 Difference]: Finished difference Result 3606 states and 9042 transitions. [2021-06-05 07:57:49,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:57:49,209 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have 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 07:57:49,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:49,213 INFO L225 Difference]: With dead ends: 3606 [2021-06-05 07:57:49,213 INFO L226 Difference]: Without dead ends: 3336 [2021-06-05 07:57:49,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 344.5ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:57:49,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-06-05 07:57:49,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2338. [2021-06-05 07:57:49,234 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 07:57:49,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 6378 transitions. [2021-06-05 07:57:49,237 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 6378 transitions. Word has length 100 [2021-06-05 07:57:49,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:49,237 INFO L482 AbstractCegarLoop]: Abstraction has 2338 states and 6378 transitions. [2021-06-05 07:57:49,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:49,237 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 6378 transitions. [2021-06-05 07:57:49,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 07:57:49,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:49,239 INFO L521 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 07:57:49,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 07:57:49,439 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:49,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:49,440 INFO L82 PathProgramCache]: Analyzing trace with hash -488919684, now seen corresponding path program 89 times [2021-06-05 07:57:49,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:49,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102813241] [2021-06-05 07:57:49,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:49,586 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 07:57:49,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:49,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102813241] [2021-06-05 07:57:49,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102813241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:49,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148685983] [2021-06-05 07:57:49,586 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 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 07:57:49,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 07:57:49,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:49,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:57:49,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:49,761 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 07:57:49,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148685983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:49,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:49,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 07:57:49,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708251447] [2021-06-05 07:57:49,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:57:49,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:49,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:57:49,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:57:49,762 INFO L87 Difference]: Start difference. First operand 2338 states and 6378 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 07:57:50,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:50,055 INFO L93 Difference]: Finished difference Result 3656 states and 9217 transitions. [2021-06-05 07:57:50,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:57:50,055 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 07:57:50,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:50,059 INFO L225 Difference]: With dead ends: 3656 [2021-06-05 07:57:50,059 INFO L226 Difference]: Without dead ends: 3386 [2021-06-05 07:57:50,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 312.8ms TimeCoverageRelationStatistics Valid=369, Invalid=1113, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:57:50,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2021-06-05 07:57:50,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 2413. [2021-06-05 07:57:50,088 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 07:57:50,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 6603 transitions. [2021-06-05 07:57:50,091 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 6603 transitions. Word has length 100 [2021-06-05 07:57:50,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:50,091 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 6603 transitions. [2021-06-05 07:57:50,091 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 07:57:50,091 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 6603 transitions. [2021-06-05 07:57:50,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 07:57:50,093 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:50,093 INFO L521 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 07:57:50,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:50,293 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:50,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:50,293 INFO L82 PathProgramCache]: Analyzing trace with hash -733996980, now seen corresponding path program 90 times [2021-06-05 07:57:50,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:50,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959527942] [2021-06-05 07:57:50,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:50,427 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 07:57:50,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:50,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959527942] [2021-06-05 07:57:50,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959527942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:50,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260755382] [2021-06-05 07:57:50,428 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 07:57:50,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 07:57:50,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:50,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:57:50,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:50,638 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 07:57:50,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260755382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:50,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:50,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 07:57:50,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083447731] [2021-06-05 07:57:50,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:57:50,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:50,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:57:50,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:57:50,639 INFO L87 Difference]: Start difference. First operand 2413 states and 6603 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:51,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:51,024 INFO L93 Difference]: Finished difference Result 3681 states and 9342 transitions. [2021-06-05 07:57:51,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:57:51,025 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have 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 07:57:51,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:51,028 INFO L225 Difference]: With dead ends: 3681 [2021-06-05 07:57:51,028 INFO L226 Difference]: Without dead ends: 3411 [2021-06-05 07:57:51,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 385.3ms TimeCoverageRelationStatistics Valid=434, Invalid=1372, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:57:51,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2021-06-05 07:57:51,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 2488. [2021-06-05 07:57:51,051 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 07:57:51,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6828 transitions. [2021-06-05 07:57:51,054 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6828 transitions. Word has length 100 [2021-06-05 07:57:51,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:51,054 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6828 transitions. [2021-06-05 07:57:51,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:51,054 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6828 transitions. [2021-06-05 07:57:51,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 07:57:51,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:51,056 INFO L521 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 07:57:51,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 07:57:51,257 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:51,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:51,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1110847302, now seen corresponding path program 91 times [2021-06-05 07:57:51,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:51,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196239491] [2021-06-05 07:57:51,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:51,387 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 07:57:51,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:51,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196239491] [2021-06-05 07:57:51,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196239491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:51,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130083427] [2021-06-05 07:57:51,388 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 07:57:51,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:51,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:57:51,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:51,570 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 07:57:51,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130083427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:51,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:51,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 07:57:51,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173686930] [2021-06-05 07:57:51,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:57:51,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:51,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:57:51,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:57:51,571 INFO L87 Difference]: Start difference. First operand 2488 states and 6828 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 07:57:51,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:51,901 INFO L93 Difference]: Finished difference Result 3706 states and 9467 transitions. [2021-06-05 07:57:51,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:57:51,901 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 07:57:51,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:51,905 INFO L225 Difference]: With dead ends: 3706 [2021-06-05 07:57:51,905 INFO L226 Difference]: Without dead ends: 3436 [2021-06-05 07:57:51,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 334.4ms TimeCoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:57:51,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3436 states. [2021-06-05 07:57:51,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3436 to 2563. [2021-06-05 07:57:51,929 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 07:57:51,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7053 transitions. [2021-06-05 07:57:51,932 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7053 transitions. Word has length 100 [2021-06-05 07:57:51,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:51,933 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7053 transitions. [2021-06-05 07:57:51,933 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 07:57:51,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7053 transitions. [2021-06-05 07:57:51,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 07:57:51,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:51,935 INFO L521 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 07:57:52,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:52,135 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:52,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:52,135 INFO L82 PathProgramCache]: Analyzing trace with hash 215908234, now seen corresponding path program 92 times [2021-06-05 07:57:52,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:52,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125968192] [2021-06-05 07:57:52,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:52,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:52,259 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 07:57:52,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:52,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125968192] [2021-06-05 07:57:52,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125968192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:52,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579739725] [2021-06-05 07:57:52,260 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 07:57:52,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:57:52,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:52,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:57:52,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:52,461 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 07:57:52,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579739725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:52,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:52,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 07:57:52,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346124218] [2021-06-05 07:57:52,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:57:52,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:52,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:57:52,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:57:52,463 INFO L87 Difference]: Start difference. First operand 2563 states and 7053 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:52,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:52,899 INFO L93 Difference]: Finished difference Result 3731 states and 9592 transitions. [2021-06-05 07:57:52,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:57:52,899 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have 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 07:57:52,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:52,903 INFO L225 Difference]: With dead ends: 3731 [2021-06-05 07:57:52,903 INFO L226 Difference]: Without dead ends: 3461 [2021-06-05 07:57:52,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 422.3ms TimeCoverageRelationStatistics Valid=468, Invalid=1512, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:57:52,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3461 states. [2021-06-05 07:57:52,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3461 to 2638. [2021-06-05 07:57:52,933 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 07:57:52,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 7278 transitions. [2021-06-05 07:57:52,937 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 7278 transitions. Word has length 100 [2021-06-05 07:57:52,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:52,937 INFO L482 AbstractCegarLoop]: Abstraction has 2638 states and 7278 transitions. [2021-06-05 07:57:52,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:52,937 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 7278 transitions. [2021-06-05 07:57:52,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 07:57:52,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:52,939 INFO L521 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 07:57:53,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 07:57:53,141 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:53,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:53,141 INFO L82 PathProgramCache]: Analyzing trace with hash 670124408, now seen corresponding path program 93 times [2021-06-05 07:57:53,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:53,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297464964] [2021-06-05 07:57:53,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:53,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:53,259 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 07:57:53,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:53,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297464964] [2021-06-05 07:57:53,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297464964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:53,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836981714] [2021-06-05 07:57:53,260 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 07:57:53,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 07:57:53,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:53,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:57:53,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:53,444 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 07:57:53,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836981714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:53,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:53,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 07:57:53,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715413712] [2021-06-05 07:57:53,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:57:53,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:53,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:57:53,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:57:53,446 INFO L87 Difference]: Start difference. First operand 2638 states and 7278 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 07:57:53,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:53,828 INFO L93 Difference]: Finished difference Result 3756 states and 9717 transitions. [2021-06-05 07:57:53,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:57:53,829 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 07:57:53,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:53,832 INFO L225 Difference]: With dead ends: 3756 [2021-06-05 07:57:53,832 INFO L226 Difference]: Without dead ends: 3486 [2021-06-05 07:57:53,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 356.5ms TimeCoverageRelationStatistics Valid=437, Invalid=1369, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:57:53,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3486 states. [2021-06-05 07:57:53,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3486 to 2713. [2021-06-05 07:57:53,866 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 07:57:53,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7503 transitions. [2021-06-05 07:57:53,870 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7503 transitions. Word has length 100 [2021-06-05 07:57:53,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:53,870 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7503 transitions. [2021-06-05 07:57:53,870 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 07:57:53,871 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7503 transitions. [2021-06-05 07:57:53,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 07:57:53,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:53,873 INFO L521 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 07:57:54,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 07:57:54,073 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:54,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:54,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1669020744, now seen corresponding path program 94 times [2021-06-05 07:57:54,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:54,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472359684] [2021-06-05 07:57:54,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:54,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:54,230 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 07:57:54,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:54,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472359684] [2021-06-05 07:57:54,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472359684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:54,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882285571] [2021-06-05 07:57:54,231 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 07:57:54,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:57:54,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:54,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:57:54,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:54,427 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 07:57:54,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882285571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:54,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:54,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 07:57:54,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373885285] [2021-06-05 07:57:54,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:57:54,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:54,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:57:54,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:57:54,428 INFO L87 Difference]: Start difference. First operand 2713 states and 7503 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:54,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:54,866 INFO L93 Difference]: Finished difference Result 3781 states and 9842 transitions. [2021-06-05 07:57:54,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:57:54,867 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have 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 07:57:54,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:54,870 INFO L225 Difference]: With dead ends: 3781 [2021-06-05 07:57:54,870 INFO L226 Difference]: Without dead ends: 3511 [2021-06-05 07:57:54,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 457.0ms TimeCoverageRelationStatistics Valid=518, Invalid=1644, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:57:54,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3511 states. [2021-06-05 07:57:54,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3511 to 2788. [2021-06-05 07:57:54,896 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 07:57:54,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7728 transitions. [2021-06-05 07:57:54,900 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7728 transitions. Word has length 100 [2021-06-05 07:57:54,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:54,900 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7728 transitions. [2021-06-05 07:57:54,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:54,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7728 transitions. [2021-06-05 07:57:54,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 07:57:54,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:54,902 INFO L521 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 07:57:55,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 07:57:55,103 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:55,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:55,103 INFO L82 PathProgramCache]: Analyzing trace with hash -210307146, now seen corresponding path program 95 times [2021-06-05 07:57:55,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:55,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960051704] [2021-06-05 07:57:55,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:55,218 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 07:57:55,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:55,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960051704] [2021-06-05 07:57:55,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960051704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:55,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338185881] [2021-06-05 07:57:55,219 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 07:57:55,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 07:57:55,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:55,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:57:55,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:55,385 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 07:57:55,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338185881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:55,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:55,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 07:57:55,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720124624] [2021-06-05 07:57:55,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:57:55,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:55,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:57:55,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:57:55,386 INFO L87 Difference]: Start difference. First operand 2788 states and 7728 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 07:57:55,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:55,761 INFO L93 Difference]: Finished difference Result 3806 states and 9967 transitions. [2021-06-05 07:57:55,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:57:55,761 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 07:57:55,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:55,764 INFO L225 Difference]: With dead ends: 3806 [2021-06-05 07:57:55,764 INFO L226 Difference]: Without dead ends: 3536 [2021-06-05 07:57:55,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 360.4ms TimeCoverageRelationStatistics Valid=495, Invalid=1485, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:57:55,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3536 states. [2021-06-05 07:57:55,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3536 to 2863. [2021-06-05 07:57:55,791 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 07:57:55,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7953 transitions. [2021-06-05 07:57:55,795 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7953 transitions. Word has length 100 [2021-06-05 07:57:55,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:55,795 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 7953 transitions. [2021-06-05 07:57:55,795 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 07:57:55,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7953 transitions. [2021-06-05 07:57:55,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 07:57:55,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:55,797 INFO L521 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 07:57:55,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:55,998 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:55,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:55,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1820012166, now seen corresponding path program 96 times [2021-06-05 07:57:55,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:55,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393260102] [2021-06-05 07:57:55,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:56,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:56,115 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 07:57:56,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:56,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393260102] [2021-06-05 07:57:56,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393260102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:56,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877033755] [2021-06-05 07:57:56,116 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 07:57:56,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 07:57:56,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:56,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:57:56,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:56,297 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 07:57:56,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877033755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:56,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:56,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 07:57:56,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646128572] [2021-06-05 07:57:56,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:57:56,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:56,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:57:56,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:57:56,298 INFO L87 Difference]: Start difference. First operand 2863 states and 7953 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:56,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:56,788 INFO L93 Difference]: Finished difference Result 3831 states and 10092 transitions. [2021-06-05 07:57:56,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:57:56,788 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have 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 07:57:56,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:56,792 INFO L225 Difference]: With dead ends: 3831 [2021-06-05 07:57:56,792 INFO L226 Difference]: Without dead ends: 3561 [2021-06-05 07:57:56,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 464.1ms TimeCoverageRelationStatistics Valid=584, Invalid=1768, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:57:56,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2021-06-05 07:57:56,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 2938. [2021-06-05 07:57:56,822 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 07:57:56,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 8178 transitions. [2021-06-05 07:57:56,826 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 8178 transitions. Word has length 100 [2021-06-05 07:57:56,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:56,826 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 8178 transitions. [2021-06-05 07:57:56,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:56,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 8178 transitions. [2021-06-05 07:57:56,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 07:57:56,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:56,828 INFO L521 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 07:57:57,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 07:57:57,029 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:57,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:57,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1860715660, now seen corresponding path program 97 times [2021-06-05 07:57:57,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:57,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801984149] [2021-06-05 07:57:57,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:57,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:57,159 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 07:57:57,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:57,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801984149] [2021-06-05 07:57:57,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801984149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:57,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375284203] [2021-06-05 07:57:57,159 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 07:57:57,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:57,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:57:57,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:57,325 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 07:57:57,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375284203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:57,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:57,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 07:57:57,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505444211] [2021-06-05 07:57:57,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:57:57,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:57,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:57:57,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:57:57,326 INFO L87 Difference]: Start difference. First operand 2938 states and 8178 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 07:57:57,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:57,744 INFO L93 Difference]: Finished difference Result 3856 states and 10217 transitions. [2021-06-05 07:57:57,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:57:57,744 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 07:57:57,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:57,747 INFO L225 Difference]: With dead ends: 3856 [2021-06-05 07:57:57,747 INFO L226 Difference]: Without dead ends: 3586 [2021-06-05 07:57:57,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 387.8ms TimeCoverageRelationStatistics Valid=569, Invalid=1593, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:57:57,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2021-06-05 07:57:57,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 3013. [2021-06-05 07:57:57,774 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 07:57:57,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 8403 transitions. [2021-06-05 07:57:57,777 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 8403 transitions. Word has length 100 [2021-06-05 07:57:57,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:57,777 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 8403 transitions. [2021-06-05 07:57:57,777 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 07:57:57,777 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 8403 transitions. [2021-06-05 07:57:57,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 07:57:57,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:57,780 INFO L521 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 07:57:57,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:57,985 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:57,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:57,985 INFO L82 PathProgramCache]: Analyzing trace with hash 719009348, now seen corresponding path program 98 times [2021-06-05 07:57:57,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:57,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297195004] [2021-06-05 07:57:57,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:57,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:58,106 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 07:57:58,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:58,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297195004] [2021-06-05 07:57:58,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297195004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:58,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221292500] [2021-06-05 07:57:58,106 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 07:57:58,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:57:58,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:58,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:57:58,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:58,304 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 07:57:58,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221292500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:58,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:58,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 07:57:58,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13789206] [2021-06-05 07:57:58,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:57:58,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:58,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:57:58,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:57:58,305 INFO L87 Difference]: Start difference. First operand 3013 states and 8403 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:58,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:58,852 INFO L93 Difference]: Finished difference Result 3941 states and 10507 transitions. [2021-06-05 07:57:58,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 07:57:58,852 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have 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 07:57:58,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:58,856 INFO L225 Difference]: With dead ends: 3941 [2021-06-05 07:57:58,856 INFO L226 Difference]: Without dead ends: 3671 [2021-06-05 07:57:58,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 514.1ms TimeCoverageRelationStatistics Valid=666, Invalid=1884, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:57:58,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3671 states. [2021-06-05 07:57:58,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3671 to 3088. [2021-06-05 07:57:58,883 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 07:57:58,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 8648 transitions. [2021-06-05 07:57:58,887 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 8648 transitions. Word has length 100 [2021-06-05 07:57:58,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:58,887 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 8648 transitions. [2021-06-05 07:57:58,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:58,887 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 8648 transitions. [2021-06-05 07:57:58,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 07:57:58,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:58,889 INFO L521 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 07:57:59,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 07:57:59,091 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:59,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:59,091 INFO L82 PathProgramCache]: Analyzing trace with hash -313638254, now seen corresponding path program 99 times [2021-06-05 07:57:59,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:59,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051591354] [2021-06-05 07:57:59,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:59,199 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 07:57:59,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:59,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051591354] [2021-06-05 07:57:59,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051591354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:59,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411912782] [2021-06-05 07:57:59,199 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 07:57:59,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 07:57:59,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:59,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:57:59,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:59,365 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 07:57:59,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411912782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:59,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:59,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 07:57:59,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593201432] [2021-06-05 07:57:59,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:57:59,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:59,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:57:59,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:57:59,366 INFO L87 Difference]: Start difference. First operand 3088 states and 8648 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 07:57:59,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:59,808 INFO L93 Difference]: Finished difference Result 4708 states and 12681 transitions. [2021-06-05 07:57:59,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:57:59,808 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 07:57:59,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:59,812 INFO L225 Difference]: With dead ends: 4708 [2021-06-05 07:57:59,812 INFO L226 Difference]: Without dead ends: 4438 [2021-06-05 07:57:59,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 407.4ms TimeCoverageRelationStatistics Valid=660, Invalid=1692, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:57:59,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2021-06-05 07:57:59,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 3268. [2021-06-05 07:57:59,842 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 07:57:59,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3268 states to 3268 states and 9207 transitions. [2021-06-05 07:57:59,846 INFO L78 Accepts]: Start accepts. Automaton has 3268 states and 9207 transitions. Word has length 100 [2021-06-05 07:57:59,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:59,847 INFO L482 AbstractCegarLoop]: Abstraction has 3268 states and 9207 transitions. [2021-06-05 07:57:59,847 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 07:57:59,847 INFO L276 IsEmpty]: Start isEmpty. Operand 3268 states and 9207 transitions. [2021-06-05 07:57:59,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 07:57:59,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:59,849 INFO L521 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 07:58:00,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:00,049 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:00,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:00,050 INFO L82 PathProgramCache]: Analyzing trace with hash -291295004, now seen corresponding path program 100 times [2021-06-05 07:58:00,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:00,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484438656] [2021-06-05 07:58:00,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:00,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:00,157 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 07:58:00,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:00,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484438656] [2021-06-05 07:58:00,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484438656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:00,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449783657] [2021-06-05 07:58:00,157 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 07:58:00,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:58:00,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:00,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:58:00,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:00,322 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 07:58:00,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449783657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:00,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:00,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 07:58:00,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407258382] [2021-06-05 07:58:00,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:58:00,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:00,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:58:00,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:58:00,323 INFO L87 Difference]: Start difference. First operand 3268 states and 9207 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 07:58:00,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:00,871 INFO L93 Difference]: Finished difference Result 4195 states and 11381 transitions. [2021-06-05 07:58:00,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 07:58:00,871 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 07:58:00,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:00,875 INFO L225 Difference]: With dead ends: 4195 [2021-06-05 07:58:00,875 INFO L226 Difference]: Without dead ends: 3706 [2021-06-05 07:58:00,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 507.5ms TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:58:00,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3706 states. [2021-06-05 07:58:00,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3706 to 2313. [2021-06-05 07:58:00,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2312 states have (on average 2.737024221453287) internal successors, (6328), 2312 states have internal predecessors, (6328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:00,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 6328 transitions. [2021-06-05 07:58:00,899 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 6328 transitions. Word has length 100 [2021-06-05 07:58:00,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:00,900 INFO L482 AbstractCegarLoop]: Abstraction has 2313 states and 6328 transitions. [2021-06-05 07:58:00,900 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 07:58:00,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 6328 transitions. [2021-06-05 07:58:00,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 07:58:00,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:00,901 INFO L521 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 07:58:01,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:01,102 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:01,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:01,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1356878341, now seen corresponding path program 101 times [2021-06-05 07:58:01,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:01,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651539585] [2021-06-05 07:58:01,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:01,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:01,244 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 07:58:01,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:01,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651539585] [2021-06-05 07:58:01,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651539585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:01,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433129642] [2021-06-05 07:58:01,244 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 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 07:58:01,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 07:58:01,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:01,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:58:01,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:01,429 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 07:58:01,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433129642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:01,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:01,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 07:58:01,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360250706] [2021-06-05 07:58:01,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:58:01,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:01,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:58:01,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:58:01,430 INFO L87 Difference]: Start difference. First operand 2313 states and 6328 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 07:58:01,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:01,712 INFO L93 Difference]: Finished difference Result 3431 states and 8767 transitions. [2021-06-05 07:58:01,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:58:01,712 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 07:58:01,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:01,715 INFO L225 Difference]: With dead ends: 3431 [2021-06-05 07:58:01,715 INFO L226 Difference]: Without dead ends: 3161 [2021-06-05 07:58:01,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 315.4ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:58:01,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3161 states. [2021-06-05 07:58:01,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3161 to 2388. [2021-06-05 07:58:01,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 2.7452869710934227) internal successors, (6553), 2387 states have internal predecessors, (6553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:01,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 6553 transitions. [2021-06-05 07:58:01,751 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 6553 transitions. Word has length 105 [2021-06-05 07:58:01,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:01,751 INFO L482 AbstractCegarLoop]: Abstraction has 2388 states and 6553 transitions. [2021-06-05 07:58:01,751 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 07:58:01,751 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 6553 transitions. [2021-06-05 07:58:01,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 07:58:01,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:01,753 INFO L521 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 07:58:01,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-05 07:58:01,954 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:01,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:01,954 INFO L82 PathProgramCache]: Analyzing trace with hash -547826485, now seen corresponding path program 102 times [2021-06-05 07:58:01,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:01,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216593916] [2021-06-05 07:58:01,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:02,102 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 07:58:02,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:02,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216593916] [2021-06-05 07:58:02,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216593916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:02,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106681013] [2021-06-05 07:58:02,103 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 07:58:02,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 07:58:02,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:02,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:58:02,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:02,305 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 07:58:02,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106681013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:02,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:02,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 07:58:02,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702875897] [2021-06-05 07:58:02,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:58:02,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:02,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:58:02,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:58:02,306 INFO L87 Difference]: Start difference. First operand 2388 states and 6553 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 07:58:02,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:02,635 INFO L93 Difference]: Finished difference Result 3801 states and 9582 transitions. [2021-06-05 07:58:02,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:58:02,635 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 07:58:02,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:02,639 INFO L225 Difference]: With dead ends: 3801 [2021-06-05 07:58:02,639 INFO L226 Difference]: Without dead ends: 3531 [2021-06-05 07:58:02,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 368.2ms TimeCoverageRelationStatistics Valid=465, Invalid=1427, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:58:02,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3531 states. [2021-06-05 07:58:02,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3531 to 2463. [2021-06-05 07:58:02,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 2462 states have (on average 2.753046303818034) internal successors, (6778), 2462 states have internal predecessors, (6778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:02,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 6778 transitions. [2021-06-05 07:58:02,664 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 6778 transitions. Word has length 105 [2021-06-05 07:58:02,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:02,664 INFO L482 AbstractCegarLoop]: Abstraction has 2463 states and 6778 transitions. [2021-06-05 07:58:02,664 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 07:58:02,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 6778 transitions. [2021-06-05 07:58:02,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 07:58:02,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:02,666 INFO L521 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 07:58:02,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:02,866 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:02,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:02,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1939776583, now seen corresponding path program 103 times [2021-06-05 07:58:02,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:02,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612022942] [2021-06-05 07:58:02,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:02,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:03,018 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 07:58:03,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:03,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612022942] [2021-06-05 07:58:03,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612022942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:03,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339540958] [2021-06-05 07:58:03,019 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 07:58:03,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:03,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:58:03,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:03,197 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 07:58:03,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339540958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:03,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:03,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 07:58:03,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81635232] [2021-06-05 07:58:03,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:58:03,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:03,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:58:03,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:58:03,198 INFO L87 Difference]: Start difference. First operand 2463 states and 6778 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 07:58:03,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:03,518 INFO L93 Difference]: Finished difference Result 3831 states and 9717 transitions. [2021-06-05 07:58:03,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:58:03,519 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 07:58:03,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:03,522 INFO L225 Difference]: With dead ends: 3831 [2021-06-05 07:58:03,522 INFO L226 Difference]: Without dead ends: 3561 [2021-06-05 07:58:03,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 347.9ms TimeCoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:58:03,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2021-06-05 07:58:03,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 2538. [2021-06-05 07:58:03,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2538 states, 2537 states have (on average 2.760346866377611) internal successors, (7003), 2537 states have internal predecessors, (7003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:03,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2538 states to 2538 states and 7003 transitions. [2021-06-05 07:58:03,548 INFO L78 Accepts]: Start accepts. Automaton has 2538 states and 7003 transitions. Word has length 105 [2021-06-05 07:58:03,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:03,548 INFO L482 AbstractCegarLoop]: Abstraction has 2538 states and 7003 transitions. [2021-06-05 07:58:03,548 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 07:58:03,548 INFO L276 IsEmpty]: Start isEmpty. Operand 2538 states and 7003 transitions. [2021-06-05 07:58:03,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 07:58:03,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:03,550 INFO L521 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 07:58:03,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:03,750 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:03,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:03,751 INFO L82 PathProgramCache]: Analyzing trace with hash 2110113417, now seen corresponding path program 104 times [2021-06-05 07:58:03,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:03,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019355165] [2021-06-05 07:58:03,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:03,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:03,913 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 07:58:03,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:03,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019355165] [2021-06-05 07:58:03,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019355165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:03,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051692849] [2021-06-05 07:58:03,913 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 07:58:03,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:58:03,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:03,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:58:03,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:04,104 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 07:58:04,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051692849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:04,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:04,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 07:58:04,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128646804] [2021-06-05 07:58:04,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:58:04,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:04,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:58:04,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:58:04,105 INFO L87 Difference]: Start difference. First operand 2538 states and 7003 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 07:58:04,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:04,483 INFO L93 Difference]: Finished difference Result 3856 states and 9842 transitions. [2021-06-05 07:58:04,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:58:04,483 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 07:58:04,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:04,487 INFO L225 Difference]: With dead ends: 3856 [2021-06-05 07:58:04,487 INFO L226 Difference]: Without dead ends: 3586 [2021-06-05 07:58:04,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 413.9ms TimeCoverageRelationStatistics Valid=490, Invalid=1580, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:58:04,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2021-06-05 07:58:04,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 2613. [2021-06-05 07:58:04,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2613 states, 2612 states have (on average 2.767228177641654) internal successors, (7228), 2612 states have internal predecessors, (7228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:04,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2613 states to 2613 states and 7228 transitions. [2021-06-05 07:58:04,515 INFO L78 Accepts]: Start accepts. Automaton has 2613 states and 7228 transitions. Word has length 105 [2021-06-05 07:58:04,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:04,515 INFO L482 AbstractCegarLoop]: Abstraction has 2613 states and 7228 transitions. [2021-06-05 07:58:04,515 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 07:58:04,515 INFO L276 IsEmpty]: Start isEmpty. Operand 2613 states and 7228 transitions. [2021-06-05 07:58:04,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 07:58:04,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:04,517 INFO L521 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 07:58:04,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 07:58:04,717 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:04,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:04,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1733263095, now seen corresponding path program 105 times [2021-06-05 07:58:04,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:04,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888475436] [2021-06-05 07:58:04,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:04,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:04,847 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 07:58:04,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:04,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888475436] [2021-06-05 07:58:04,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888475436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:04,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121053648] [2021-06-05 07:58:04,848 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 07:58:04,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 07:58:04,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:04,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:58:04,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:05,030 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 07:58:05,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121053648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:05,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:05,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 07:58:05,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127869199] [2021-06-05 07:58:05,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:58:05,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:05,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:58:05,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:58:05,031 INFO L87 Difference]: Start difference. First operand 2613 states and 7228 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 07:58:05,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:05,373 INFO L93 Difference]: Finished difference Result 3881 states and 9967 transitions. [2021-06-05 07:58:05,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:58:05,373 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 07:58:05,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:05,377 INFO L225 Difference]: With dead ends: 3881 [2021-06-05 07:58:05,377 INFO L226 Difference]: Without dead ends: 3611 [2021-06-05 07:58:05,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 350.4ms TimeCoverageRelationStatistics Valid=506, Invalid=1564, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:58:05,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3611 states. [2021-06-05 07:58:05,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3611 to 2688. [2021-06-05 07:58:05,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2688 states, 2687 states have (on average 2.773725344250093) internal successors, (7453), 2687 states have internal predecessors, (7453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:05,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 7453 transitions. [2021-06-05 07:58:05,407 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 7453 transitions. Word has length 105 [2021-06-05 07:58:05,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:05,407 INFO L482 AbstractCegarLoop]: Abstraction has 2688 states and 7453 transitions. [2021-06-05 07:58:05,407 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 07:58:05,407 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 7453 transitions. [2021-06-05 07:58:05,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 07:58:05,409 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:05,409 INFO L521 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 07:58:05,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 07:58:05,610 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:05,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:05,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1234948665, now seen corresponding path program 106 times [2021-06-05 07:58:05,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:05,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391996422] [2021-06-05 07:58:05,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:05,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:05,764 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 07:58:05,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:05,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391996422] [2021-06-05 07:58:05,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391996422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:05,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113438599] [2021-06-05 07:58:05,764 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 07:58:05,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:58:05,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:05,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:58:05,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:05,979 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 07:58:05,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113438599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:05,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:05,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 07:58:05,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138119985] [2021-06-05 07:58:05,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:58:05,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:05,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:58:05,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:58:05,981 INFO L87 Difference]: Start difference. First operand 2688 states and 7453 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 07:58:06,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:06,402 INFO L93 Difference]: Finished difference Result 3906 states and 10092 transitions. [2021-06-05 07:58:06,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:58:06,402 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 07:58:06,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:06,405 INFO L225 Difference]: With dead ends: 3906 [2021-06-05 07:58:06,406 INFO L226 Difference]: Without dead ends: 3636 [2021-06-05 07:58:06,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 438.9ms TimeCoverageRelationStatistics Valid=531, Invalid=1725, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:58:06,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3636 states. [2021-06-05 07:58:06,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3636 to 2763. [2021-06-05 07:58:06,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2763 states, 2762 states have (on average 2.779869659666908) internal successors, (7678), 2762 states have internal predecessors, (7678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:06,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2763 states to 2763 states and 7678 transitions. [2021-06-05 07:58:06,433 INFO L78 Accepts]: Start accepts. Automaton has 2763 states and 7678 transitions. Word has length 105 [2021-06-05 07:58:06,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:06,433 INFO L482 AbstractCegarLoop]: Abstraction has 2763 states and 7678 transitions. [2021-06-05 07:58:06,434 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 07:58:06,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2763 states and 7678 transitions. [2021-06-05 07:58:06,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 07:58:06,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:06,436 INFO L521 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 07:58:06,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 07:58:06,637 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:06,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:06,637 INFO L82 PathProgramCache]: Analyzing trace with hash -780732491, now seen corresponding path program 107 times [2021-06-05 07:58:06,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:06,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685082398] [2021-06-05 07:58:06,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:06,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:06,772 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 07:58:06,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:06,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685082398] [2021-06-05 07:58:06,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685082398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:06,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831904551] [2021-06-05 07:58:06,773 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 07:58:06,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 07:58:06,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:06,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:58:06,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:06,957 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 07:58:06,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831904551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:06,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:06,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 07:58:06,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386421680] [2021-06-05 07:58:06,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:58:06,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:06,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:58:06,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:58:06,958 INFO L87 Difference]: Start difference. First operand 2763 states and 7678 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 07:58:07,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:07,337 INFO L93 Difference]: Finished difference Result 3931 states and 10217 transitions. [2021-06-05 07:58:07,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:58:07,338 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 07:58:07,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:07,341 INFO L225 Difference]: With dead ends: 3931 [2021-06-05 07:58:07,341 INFO L226 Difference]: Without dead ends: 3661 [2021-06-05 07:58:07,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 369.8ms TimeCoverageRelationStatistics Valid=561, Invalid=1695, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:58:07,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3661 states. [2021-06-05 07:58:07,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3661 to 2838. [2021-06-05 07:58:07,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2838 states, 2837 states have (on average 2.785689108212901) internal successors, (7903), 2837 states have internal predecessors, (7903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:07,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2838 states to 2838 states and 7903 transitions. [2021-06-05 07:58:07,370 INFO L78 Accepts]: Start accepts. Automaton has 2838 states and 7903 transitions. Word has length 105 [2021-06-05 07:58:07,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:07,370 INFO L482 AbstractCegarLoop]: Abstraction has 2838 states and 7903 transitions. [2021-06-05 07:58:07,370 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 07:58:07,370 INFO L276 IsEmpty]: Start isEmpty. Operand 2838 states and 7903 transitions. [2021-06-05 07:58:07,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 07:58:07,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:07,372 INFO L521 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 07:58:07,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:07,572 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:07,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:07,573 INFO L82 PathProgramCache]: Analyzing trace with hash 218163845, now seen corresponding path program 108 times [2021-06-05 07:58:07,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:07,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025602163] [2021-06-05 07:58:07,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:07,702 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 07:58:07,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:07,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025602163] [2021-06-05 07:58:07,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025602163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:07,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006053308] [2021-06-05 07:58:07,702 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 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 07:58:07,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 07:58:07,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:07,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:58:07,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:07,928 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 07:58:07,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006053308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:07,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:07,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 07:58:07,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384162327] [2021-06-05 07:58:07,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:58:07,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:07,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:58:07,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:58:07,929 INFO L87 Difference]: Start difference. First operand 2838 states and 7903 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 07:58:08,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:08,403 INFO L93 Difference]: Finished difference Result 3956 states and 10342 transitions. [2021-06-05 07:58:08,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:58:08,403 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 07:58:08,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:08,407 INFO L225 Difference]: With dead ends: 3956 [2021-06-05 07:58:08,407 INFO L226 Difference]: Without dead ends: 3686 [2021-06-05 07:58:08,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 458.8ms TimeCoverageRelationStatistics Valid=588, Invalid=1862, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:58:08,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3686 states. [2021-06-05 07:58:08,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3686 to 2913. [2021-06-05 07:58:08,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2912 states have (on average 2.791208791208791) internal successors, (8128), 2912 states have internal predecessors, (8128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:08,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 8128 transitions. [2021-06-05 07:58:08,437 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 8128 transitions. Word has length 105 [2021-06-05 07:58:08,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:08,437 INFO L482 AbstractCegarLoop]: Abstraction has 2913 states and 8128 transitions. [2021-06-05 07:58:08,438 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 07:58:08,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 8128 transitions. [2021-06-05 07:58:08,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 07:58:08,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:08,440 INFO L521 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 07:58:08,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 07:58:08,640 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:08,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:08,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1661164045, now seen corresponding path program 109 times [2021-06-05 07:58:08,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:08,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385265161] [2021-06-05 07:58:08,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:08,766 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 07:58:08,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:08,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385265161] [2021-06-05 07:58:08,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385265161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:08,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863449219] [2021-06-05 07:58:08,767 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 07:58:08,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:08,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:58:08,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:08,953 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 07:58:08,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863449219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:08,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:08,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 07:58:08,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043467339] [2021-06-05 07:58:08,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:58:08,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:08,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:58:08,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:58:08,954 INFO L87 Difference]: Start difference. First operand 2913 states and 8128 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 07:58:09,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:09,382 INFO L93 Difference]: Finished difference Result 3981 states and 10467 transitions. [2021-06-05 07:58:09,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:58:09,382 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 07:58:09,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:09,386 INFO L225 Difference]: With dead ends: 3981 [2021-06-05 07:58:09,386 INFO L226 Difference]: Without dead ends: 3711 [2021-06-05 07:58:09,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 397.0ms TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:58:09,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3711 states. [2021-06-05 07:58:09,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3711 to 2988. [2021-06-05 07:58:09,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2988 states, 2987 states have (on average 2.7964512889186475) internal successors, (8353), 2987 states have internal predecessors, (8353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:09,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2988 states to 2988 states and 8353 transitions. [2021-06-05 07:58:09,418 INFO L78 Accepts]: Start accepts. Automaton has 2988 states and 8353 transitions. Word has length 105 [2021-06-05 07:58:09,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:09,418 INFO L482 AbstractCegarLoop]: Abstraction has 2988 states and 8353 transitions. [2021-06-05 07:58:09,418 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 07:58:09,418 INFO L276 IsEmpty]: Start isEmpty. Operand 2988 states and 8353 transitions. [2021-06-05 07:58:09,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 07:58:09,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:09,420 INFO L521 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 07:58:09,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 07:58:09,621 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:09,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:09,621 INFO L82 PathProgramCache]: Analyzing trace with hash 369155267, now seen corresponding path program 110 times [2021-06-05 07:58:09,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:09,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228030572] [2021-06-05 07:58:09,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:09,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:09,746 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 07:58:09,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:09,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228030572] [2021-06-05 07:58:09,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228030572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:09,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297900327] [2021-06-05 07:58:09,746 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 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 07:58:09,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:58:09,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:09,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:58:09,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:09,965 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 07:58:09,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297900327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:09,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:09,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 07:58:09,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52435070] [2021-06-05 07:58:09,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:58:09,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:09,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:58:09,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:58:09,966 INFO L87 Difference]: Start difference. First operand 2988 states and 8353 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 07:58:10,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:10,483 INFO L93 Difference]: Finished difference Result 4006 states and 10592 transitions. [2021-06-05 07:58:10,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 07:58:10,483 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 07:58:10,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:10,487 INFO L225 Difference]: With dead ends: 4006 [2021-06-05 07:58:10,487 INFO L226 Difference]: Without dead ends: 3736 [2021-06-05 07:58:10,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 488.5ms TimeCoverageRelationStatistics Valid=661, Invalid=1991, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:58:10,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3736 states. [2021-06-05 07:58:10,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3736 to 3063. [2021-06-05 07:58:10,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 3062 states have (on average 2.8014369693011103) internal successors, (8578), 3062 states have internal predecessors, (8578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:10,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 8578 transitions. [2021-06-05 07:58:10,518 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 8578 transitions. Word has length 105 [2021-06-05 07:58:10,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:10,518 INFO L482 AbstractCegarLoop]: Abstraction has 3063 states and 8578 transitions. [2021-06-05 07:58:10,518 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 07:58:10,518 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 8578 transitions. [2021-06-05 07:58:10,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 07:58:10,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:10,520 INFO L521 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 07:58:10,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 07:58:10,721 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:10,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:10,721 INFO L82 PathProgramCache]: Analyzing trace with hash 983394737, now seen corresponding path program 111 times [2021-06-05 07:58:10,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:10,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631303730] [2021-06-05 07:58:10,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:10,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:10,837 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 07:58:10,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:10,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631303730] [2021-06-05 07:58:10,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631303730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:10,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351881487] [2021-06-05 07:58:10,837 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 07:58:10,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 07:58:10,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:10,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:58:10,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:11,013 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 07:58:11,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351881487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:11,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:11,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 07:58:11,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574318094] [2021-06-05 07:58:11,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:58:11,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:11,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:58:11,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:58:11,014 INFO L87 Difference]: Start difference. First operand 3063 states and 8578 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 07:58:11,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:11,474 INFO L93 Difference]: Finished difference Result 4031 states and 10717 transitions. [2021-06-05 07:58:11,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 07:58:11,474 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 07:58:11,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:11,478 INFO L225 Difference]: With dead ends: 4031 [2021-06-05 07:58:11,478 INFO L226 Difference]: Without dead ends: 3761 [2021-06-05 07:58:11,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 413.0ms TimeCoverageRelationStatistics Valid=719, Invalid=1933, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:58:11,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2021-06-05 07:58:11,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 3138. [2021-06-05 07:58:11,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3138 states, 3137 states have (on average 2.8061842524705134) internal successors, (8803), 3137 states have internal predecessors, (8803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:11,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3138 states to 3138 states and 8803 transitions. [2021-06-05 07:58:11,510 INFO L78 Accepts]: Start accepts. Automaton has 3138 states and 8803 transitions. Word has length 105 [2021-06-05 07:58:11,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:11,510 INFO L482 AbstractCegarLoop]: Abstraction has 3138 states and 8803 transitions. [2021-06-05 07:58:11,510 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 07:58:11,510 INFO L276 IsEmpty]: Start isEmpty. Operand 3138 states and 8803 transitions. [2021-06-05 07:58:11,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 07:58:11,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:11,512 INFO L521 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 07:58:11,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:11,712 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:11,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:11,713 INFO L82 PathProgramCache]: Analyzing trace with hash -731847551, now seen corresponding path program 112 times [2021-06-05 07:58:11,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:11,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624465614] [2021-06-05 07:58:11,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:11,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:11,832 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 07:58:11,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:11,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624465614] [2021-06-05 07:58:11,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624465614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:11,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906795001] [2021-06-05 07:58:11,833 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 07:58:11,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:58:11,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:11,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:58:11,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:12,066 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 07:58:12,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906795001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:12,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:12,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 07:58:12,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737626331] [2021-06-05 07:58:12,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:58:12,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:12,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:58:12,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:58:12,068 INFO L87 Difference]: Start difference. First operand 3138 states and 8803 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 07:58:12,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:12,627 INFO L93 Difference]: Finished difference Result 4116 states and 11007 transitions. [2021-06-05 07:58:12,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:58:12,627 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 07:58:12,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:12,630 INFO L225 Difference]: With dead ends: 4116 [2021-06-05 07:58:12,630 INFO L226 Difference]: Without dead ends: 3846 [2021-06-05 07:58:12,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 524.7ms TimeCoverageRelationStatistics Valid=750, Invalid=2112, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:58:12,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3846 states. [2021-06-05 07:58:12,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3846 to 3213. [2021-06-05 07:58:12,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3213 states, 3212 states have (on average 2.816936488169365) internal successors, (9048), 3212 states have internal predecessors, (9048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:12,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3213 states to 3213 states and 9048 transitions. [2021-06-05 07:58:12,662 INFO L78 Accepts]: Start accepts. Automaton has 3213 states and 9048 transitions. Word has length 105 [2021-06-05 07:58:12,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:12,663 INFO L482 AbstractCegarLoop]: Abstraction has 3213 states and 9048 transitions. [2021-06-05 07:58:12,663 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 07:58:12,663 INFO L276 IsEmpty]: Start isEmpty. Operand 3213 states and 9048 transitions. [2021-06-05 07:58:12,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 07:58:12,665 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:12,665 INFO L521 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 07:58:12,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:12,869 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:12,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:12,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1764495153, now seen corresponding path program 113 times [2021-06-05 07:58:12,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:12,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392652499] [2021-06-05 07:58:12,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:12,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:12,984 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 07:58:12,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:12,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392652499] [2021-06-05 07:58:12,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392652499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:12,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595111624] [2021-06-05 07:58:12,985 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 07:58:13,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 07:58:13,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:13,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:58:13,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:13,153 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 07:58:13,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595111624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:13,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:13,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 07:58:13,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568032198] [2021-06-05 07:58:13,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:58:13,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:13,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:58:13,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:58:13,154 INFO L87 Difference]: Start difference. First operand 3213 states and 9048 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 07:58:13,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:13,631 INFO L93 Difference]: Finished difference Result 4858 states and 13131 transitions. [2021-06-05 07:58:13,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 07:58:13,631 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 07:58:13,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:13,636 INFO L225 Difference]: With dead ends: 4858 [2021-06-05 07:58:13,636 INFO L226 Difference]: Without dead ends: 4588 [2021-06-05 07:58:13,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 432.7ms TimeCoverageRelationStatistics Valid=823, Invalid=2039, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:58:13,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4588 states. [2021-06-05 07:58:13,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4588 to 3393. [2021-06-05 07:58:13,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3393 states, 3392 states have (on average 2.832252358490566) internal successors, (9607), 3392 states have internal predecessors, (9607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:13,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3393 states to 3393 states and 9607 transitions. [2021-06-05 07:58:13,673 INFO L78 Accepts]: Start accepts. Automaton has 3393 states and 9607 transitions. Word has length 105 [2021-06-05 07:58:13,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:13,673 INFO L482 AbstractCegarLoop]: Abstraction has 3393 states and 9607 transitions. [2021-06-05 07:58:13,673 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 07:58:13,673 INFO L276 IsEmpty]: Start isEmpty. Operand 3393 states and 9607 transitions. [2021-06-05 07:58:13,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 07:58:13,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:13,675 INFO L521 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 07:58:13,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:13,876 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:13,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:13,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1742151903, now seen corresponding path program 114 times [2021-06-05 07:58:13,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:13,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7553037] [2021-06-05 07:58:13,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:13,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:14,022 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 07:58:14,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:14,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7553037] [2021-06-05 07:58:14,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7553037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:14,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2561632] [2021-06-05 07:58:14,023 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 07:58:14,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 07:58:14,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:14,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:58:14,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:14,209 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 07:58:14,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2561632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:14,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:14,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 07:58:14,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369851756] [2021-06-05 07:58:14,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:58:14,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:14,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:58:14,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:58:14,210 INFO L87 Difference]: Start difference. First operand 3393 states and 9607 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 07:58:14,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:14,838 INFO L93 Difference]: Finished difference Result 4726 states and 12796 transitions. [2021-06-05 07:58:14,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 07:58:14,839 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 07:58:14,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:14,843 INFO L225 Difference]: With dead ends: 4726 [2021-06-05 07:58:14,843 INFO L226 Difference]: Without dead ends: 4151 [2021-06-05 07:58:14,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 609.4ms TimeCoverageRelationStatistics Valid=896, Invalid=2526, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 07:58:14,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-06-05 07:58:14,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3428. [2021-06-05 07:58:14,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 2.825503355704698) internal successors, (9683), 3427 states have internal predecessors, (9683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:14,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9683 transitions. [2021-06-05 07:58:14,877 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9683 transitions. Word has length 105 [2021-06-05 07:58:14,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:14,877 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9683 transitions. [2021-06-05 07:58:14,877 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 07:58:14,877 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9683 transitions. [2021-06-05 07:58:14,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:58:14,879 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:14,879 INFO L521 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 07:58:15,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 07:58:15,080 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:15,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:15,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1657780875, now seen corresponding path program 115 times [2021-06-05 07:58:15,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:15,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666139966] [2021-06-05 07:58:15,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:15,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:15,244 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 07:58:15,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:15,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666139966] [2021-06-05 07:58:15,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666139966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:15,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431090892] [2021-06-05 07:58:15,244 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 07:58:15,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:15,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:58:15,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:15,456 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 07:58:15,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431090892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:15,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:15,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 25 [2021-06-05 07:58:15,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808717459] [2021-06-05 07:58:15,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:58:15,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:15,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:58:15,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:58:15,457 INFO L87 Difference]: Start difference. First operand 3428 states and 9683 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 07:58:15,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:15,829 INFO L93 Difference]: Finished difference Result 4468 states and 12083 transitions. [2021-06-05 07:58:15,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:58:15,829 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 07:58:15,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:15,861 INFO L225 Difference]: With dead ends: 4468 [2021-06-05 07:58:15,861 INFO L226 Difference]: Without dead ends: 4134 [2021-06-05 07:58:15,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 400.8ms TimeCoverageRelationStatistics Valid=572, Invalid=1590, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:58:15,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4134 states. [2021-06-05 07:58:15,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4134 to 3513. [2021-06-05 07:58:15,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3513 states, 3512 states have (on average 2.805523917995444) internal successors, (9853), 3512 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 07:58:15,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 9853 transitions. [2021-06-05 07:58:15,892 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 9853 transitions. Word has length 110 [2021-06-05 07:58:15,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:15,892 INFO L482 AbstractCegarLoop]: Abstraction has 3513 states and 9853 transitions. [2021-06-05 07:58:15,892 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 07:58:15,893 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 9853 transitions. [2021-06-05 07:58:15,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:58:15,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:15,895 INFO L521 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 07:58:16,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 07:58:16,096 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:16,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:16,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1067386545, now seen corresponding path program 116 times [2021-06-05 07:58:16,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:16,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23654062] [2021-06-05 07:58:16,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:16,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:16,271 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 07:58:16,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:16,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23654062] [2021-06-05 07:58:16,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23654062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:16,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069227275] [2021-06-05 07:58:16,271 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 07:58:16,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:58:16,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:16,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:58:16,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:16,468 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 07:58:16,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069227275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:16,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:16,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 07:58:16,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900561564] [2021-06-05 07:58:16,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:58:16,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:16,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:58:16,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:58:16,469 INFO L87 Difference]: Start difference. First operand 3513 states and 9853 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 07:58:16,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:16,768 INFO L93 Difference]: Finished difference Result 5061 states and 13077 transitions. [2021-06-05 07:58:16,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:58:16,768 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 07:58:16,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:16,774 INFO L225 Difference]: With dead ends: 5061 [2021-06-05 07:58:16,774 INFO L226 Difference]: Without dead ends: 4791 [2021-06-05 07:58:16,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 326.5ms TimeCoverageRelationStatistics Valid=446, Invalid=1194, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:58:16,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4791 states. [2021-06-05 07:58:16,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4791 to 3528. [2021-06-05 07:58:16,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:16,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-05 07:58:16,814 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-05 07:58:16,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:16,814 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-05 07:58:16,815 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 07:58:16,815 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-05 07:58:16,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:58:16,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:16,817 INFO L521 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 07:58:17,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 07:58:17,018 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:17,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:17,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1447830497, now seen corresponding path program 117 times [2021-06-05 07:58:17,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:17,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161955049] [2021-06-05 07:58:17,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:17,198 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 07:58:17,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:17,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161955049] [2021-06-05 07:58:17,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161955049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:17,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053027109] [2021-06-05 07:58:17,198 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 07:58:17,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 07:58:17,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:17,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:58:17,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:17,412 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 07:58:17,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053027109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:17,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:17,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 07:58:17,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621166142] [2021-06-05 07:58:17,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:58:17,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:17,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:58:17,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:58:17,414 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 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 07:58:17,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:17,804 INFO L93 Difference]: Finished difference Result 4946 states and 12847 transitions. [2021-06-05 07:58:17,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:58:17,804 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 07:58:17,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:17,809 INFO L225 Difference]: With dead ends: 4946 [2021-06-05 07:58:17,809 INFO L226 Difference]: Without dead ends: 4676 [2021-06-05 07:58:17,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 433.3ms TimeCoverageRelationStatistics Valid=507, Invalid=1473, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:58:17,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4676 states. [2021-06-05 07:58:17,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4676 to 3528. [2021-06-05 07:58:17,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:17,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-05 07:58:17,861 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-05 07:58:17,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:17,861 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-05 07:58:17,861 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 07:58:17,861 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-05 07:58:17,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:58:17,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:17,864 INFO L521 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 07:58:18,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 07:58:18,064 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:18,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:18,065 INFO L82 PathProgramCache]: Analyzing trace with hash -823455347, now seen corresponding path program 118 times [2021-06-05 07:58:18,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:18,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346807685] [2021-06-05 07:58:18,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:18,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:18,221 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 07:58:18,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:18,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346807685] [2021-06-05 07:58:18,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346807685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:18,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552086084] [2021-06-05 07:58:18,222 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 07:58:18,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:58:18,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:18,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:58:18,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:18,410 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 07:58:18,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552086084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:18,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:18,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 07:58:18,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675581909] [2021-06-05 07:58:18,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:58:18,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:18,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:58:18,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:58:18,411 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 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 07:58:18,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:18,746 INFO L93 Difference]: Finished difference Result 4921 states and 12797 transitions. [2021-06-05 07:58:18,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:58:18,746 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 07:58:18,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:18,751 INFO L225 Difference]: With dead ends: 4921 [2021-06-05 07:58:18,751 INFO L226 Difference]: Without dead ends: 4651 [2021-06-05 07:58:18,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 350.4ms TimeCoverageRelationStatistics Valid=454, Invalid=1352, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:58:18,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4651 states. [2021-06-05 07:58:18,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4651 to 3528. [2021-06-05 07:58:18,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:18,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-05 07:58:18,787 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-05 07:58:18,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:18,787 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-05 07:58:18,787 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 07:58:18,787 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-05 07:58:18,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:58:18,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:18,790 INFO L521 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 07:58:18,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 07:58:18,992 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:18,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:18,992 INFO L82 PathProgramCache]: Analyzing trace with hash -14403491, now seen corresponding path program 119 times [2021-06-05 07:58:18,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:18,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935706332] [2021-06-05 07:58:18,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:19,159 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 07:58:19,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:19,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935706332] [2021-06-05 07:58:19,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935706332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:19,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519352952] [2021-06-05 07:58:19,160 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 07:58:19,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 07:58:19,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:19,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:58:19,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:19,378 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 07:58:19,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519352952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:19,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:19,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 07:58:19,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461090731] [2021-06-05 07:58:19,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:58:19,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:19,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:58:19,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:58:19,380 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 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 07:58:19,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:19,805 INFO L93 Difference]: Finished difference Result 4871 states and 12697 transitions. [2021-06-05 07:58:19,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:58:19,806 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 07:58:19,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:19,810 INFO L225 Difference]: With dead ends: 4871 [2021-06-05 07:58:19,810 INFO L226 Difference]: Without dead ends: 4601 [2021-06-05 07:58:19,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 446.9ms TimeCoverageRelationStatistics Valid=523, Invalid=1639, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:58:19,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2021-06-05 07:58:19,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 3528. [2021-06-05 07:58:19,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:19,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-05 07:58:19,870 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-05 07:58:19,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:19,870 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-05 07:58:19,871 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 07:58:19,871 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-05 07:58:19,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:58:19,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:19,874 INFO L521 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 07:58:20,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:20,077 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:20,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:20,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1406353589, now seen corresponding path program 120 times [2021-06-05 07:58:20,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:20,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772528566] [2021-06-05 07:58:20,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:20,232 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 07:58:20,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:20,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772528566] [2021-06-05 07:58:20,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772528566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:20,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281981270] [2021-06-05 07:58:20,232 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 07:58:20,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 07:58:20,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:20,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:58:20,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:20,427 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 07:58:20,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281981270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:20,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:20,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 07:58:20,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502288632] [2021-06-05 07:58:20,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:58:20,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:20,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:58:20,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:58:20,428 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 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 07:58:20,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:20,770 INFO L93 Difference]: Finished difference Result 4821 states and 12597 transitions. [2021-06-05 07:58:20,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:58:20,770 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 07:58:20,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:20,774 INFO L225 Difference]: With dead ends: 4821 [2021-06-05 07:58:20,775 INFO L226 Difference]: Without dead ends: 4551 [2021-06-05 07:58:20,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 362.0ms TimeCoverageRelationStatistics Valid=478, Invalid=1502, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:58:20,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4551 states. [2021-06-05 07:58:20,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4551 to 3528. [2021-06-05 07:58:20,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:20,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-05 07:58:20,810 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-05 07:58:20,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:20,810 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-05 07:58:20,810 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 07:58:20,810 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-05 07:58:20,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:58:20,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:20,813 INFO L521 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 07:58:21,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 07:58:21,014 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:21,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:21,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1651430885, now seen corresponding path program 121 times [2021-06-05 07:58:21,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:21,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799923473] [2021-06-05 07:58:21,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:21,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:21,163 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 07:58:21,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:21,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799923473] [2021-06-05 07:58:21,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799923473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:21,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084079184] [2021-06-05 07:58:21,164 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 07:58:21,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:21,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:58:21,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:21,357 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 07:58:21,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084079184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:21,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:21,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 07:58:21,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978154610] [2021-06-05 07:58:21,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:58:21,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:21,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:58:21,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:58:21,358 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 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 07:58:21,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:21,807 INFO L93 Difference]: Finished difference Result 4771 states and 12497 transitions. [2021-06-05 07:58:21,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:58:21,807 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 07:58:21,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:21,812 INFO L225 Difference]: With dead ends: 4771 [2021-06-05 07:58:21,812 INFO L226 Difference]: Without dead ends: 4501 [2021-06-05 07:58:21,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 456.0ms TimeCoverageRelationStatistics Valid=555, Invalid=1797, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:58:21,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4501 states. [2021-06-05 07:58:21,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4501 to 3528. [2021-06-05 07:58:21,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:21,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-05 07:58:21,869 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-05 07:58:21,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:21,869 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-05 07:58:21,870 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 07:58:21,870 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-05 07:58:21,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:58:21,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:21,872 INFO L521 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 07:58:22,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 07:58:22,073 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:22,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:22,073 INFO L82 PathProgramCache]: Analyzing trace with hash -2028281207, now seen corresponding path program 122 times [2021-06-05 07:58:22,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:22,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163150887] [2021-06-05 07:58:22,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:22,227 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 07:58:22,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:22,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163150887] [2021-06-05 07:58:22,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163150887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:22,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631870694] [2021-06-05 07:58:22,228 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 07:58:22,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:58:22,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:22,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:58:22,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:22,447 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 07:58:22,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631870694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:22,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:22,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 07:58:22,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854403243] [2021-06-05 07:58:22,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:58:22,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:22,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:58:22,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:58:22,449 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 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 07:58:22,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:22,855 INFO L93 Difference]: Finished difference Result 4721 states and 12397 transitions. [2021-06-05 07:58:22,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:58:22,855 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 07:58:22,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:22,860 INFO L225 Difference]: With dead ends: 4721 [2021-06-05 07:58:22,860 INFO L226 Difference]: Without dead ends: 4451 [2021-06-05 07:58:22,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 410.7ms TimeCoverageRelationStatistics Valid=518, Invalid=1644, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:58:22,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2021-06-05 07:58:22,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 3528. [2021-06-05 07:58:22,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:22,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-05 07:58:22,900 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-05 07:58:22,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:22,900 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-05 07:58:22,901 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 07:58:22,901 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-05 07:58:22,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:58:22,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:22,904 INFO L521 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 07:58:23,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:23,105 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:23,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:23,105 INFO L82 PathProgramCache]: Analyzing trace with hash -701525671, now seen corresponding path program 123 times [2021-06-05 07:58:23,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:23,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142861346] [2021-06-05 07:58:23,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:23,249 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 07:58:23,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:23,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142861346] [2021-06-05 07:58:23,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142861346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:23,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301142941] [2021-06-05 07:58:23,250 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 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 07:58:23,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 07:58:23,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:23,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:58:23,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:23,452 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 07:58:23,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301142941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:23,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:23,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 07:58:23,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678978618] [2021-06-05 07:58:23,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:58:23,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:23,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:58:23,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:58:23,454 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 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 07:58:23,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:23,937 INFO L93 Difference]: Finished difference Result 4671 states and 12297 transitions. [2021-06-05 07:58:23,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:58:23,938 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 07:58:23,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:23,942 INFO L225 Difference]: With dead ends: 4671 [2021-06-05 07:58:23,942 INFO L226 Difference]: Without dead ends: 4401 [2021-06-05 07:58:23,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 485.5ms TimeCoverageRelationStatistics Valid=603, Invalid=1947, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:58:23,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2021-06-05 07:58:23,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 3528. [2021-06-05 07:58:23,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:23,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-05 07:58:23,974 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-05 07:58:23,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:23,974 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-05 07:58:23,974 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 07:58:23,974 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-05 07:58:23,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:58:23,977 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:23,977 INFO L521 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 07:58:24,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:24,177 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:24,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:24,178 INFO L82 PathProgramCache]: Analyzing trace with hash -247309497, now seen corresponding path program 124 times [2021-06-05 07:58:24,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:24,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449324544] [2021-06-05 07:58:24,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:24,315 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 07:58:24,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:24,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449324544] [2021-06-05 07:58:24,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449324544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:24,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724593818] [2021-06-05 07:58:24,315 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 07:58:24,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:58:24,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:24,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:58:24,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:24,533 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 07:58:24,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724593818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:24,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:24,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 07:58:24,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349448505] [2021-06-05 07:58:24,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:58:24,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:24,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:58:24,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:58:24,534 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 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 07:58:24,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:24,943 INFO L93 Difference]: Finished difference Result 4621 states and 12197 transitions. [2021-06-05 07:58:24,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:58:24,944 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 07:58:24,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:24,948 INFO L225 Difference]: With dead ends: 4621 [2021-06-05 07:58:24,948 INFO L226 Difference]: Without dead ends: 4351 [2021-06-05 07:58:24,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 407.3ms TimeCoverageRelationStatistics Valid=574, Invalid=1778, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:58:24,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4351 states. [2021-06-05 07:58:24,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4351 to 3528. [2021-06-05 07:58:24,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:24,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-05 07:58:24,985 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-05 07:58:24,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:24,985 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-05 07:58:24,985 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 07:58:24,985 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-05 07:58:24,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:58:24,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:24,988 INFO L521 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 07:58:25,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:25,189 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:25,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:25,189 INFO L82 PathProgramCache]: Analyzing trace with hash 751586839, now seen corresponding path program 125 times [2021-06-05 07:58:25,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:25,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365854134] [2021-06-05 07:58:25,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:25,325 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 07:58:25,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:25,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365854134] [2021-06-05 07:58:25,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365854134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:25,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726753819] [2021-06-05 07:58:25,325 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 07:58:25,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 07:58:25,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:25,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:58:25,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:25,524 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 07:58:25,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726753819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:25,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:25,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 07:58:25,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437272262] [2021-06-05 07:58:25,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:58:25,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:25,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:58:25,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:58:25,525 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 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 07:58:26,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:26,068 INFO L93 Difference]: Finished difference Result 4571 states and 12097 transitions. [2021-06-05 07:58:26,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 07:58:26,068 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 07:58:26,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:26,073 INFO L225 Difference]: With dead ends: 4571 [2021-06-05 07:58:26,073 INFO L226 Difference]: Without dead ends: 4301 [2021-06-05 07:58:26,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 521.7ms TimeCoverageRelationStatistics Valid=667, Invalid=2089, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:58:26,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4301 states. [2021-06-05 07:58:26,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4301 to 3528. [2021-06-05 07:58:26,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:26,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-05 07:58:26,109 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-05 07:58:26,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:26,109 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-05 07:58:26,109 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 07:58:26,109 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-05 07:58:26,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:58:26,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:26,112 INFO L521 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 07:58:26,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 07:58:26,313 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:26,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:26,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1127741051, now seen corresponding path program 126 times [2021-06-05 07:58:26,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:26,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169134162] [2021-06-05 07:58:26,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:26,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:26,447 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 07:58:26,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:26,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169134162] [2021-06-05 07:58:26,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169134162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:26,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145677648] [2021-06-05 07:58:26,447 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 07:58:26,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 07:58:26,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:26,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:58:26,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:26,632 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 07:58:26,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145677648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:26,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:26,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 07:58:26,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355038274] [2021-06-05 07:58:26,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:58:26,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:26,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:58:26,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:58:26,633 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 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 07:58:27,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:27,121 INFO L93 Difference]: Finished difference Result 4521 states and 11997 transitions. [2021-06-05 07:58:27,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:58:27,121 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 07:58:27,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:27,126 INFO L225 Difference]: With dead ends: 4521 [2021-06-05 07:58:27,126 INFO L226 Difference]: Without dead ends: 4251 [2021-06-05 07:58:27,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 466.0ms TimeCoverageRelationStatistics Valid=646, Invalid=1904, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:58:27,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4251 states. [2021-06-05 07:58:27,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4251 to 3528. [2021-06-05 07:58:27,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:27,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-05 07:58:27,159 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-05 07:58:27,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:27,159 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-05 07:58:27,159 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 07:58:27,159 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-05 07:58:27,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:58:27,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:27,163 INFO L521 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 07:58:27,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 07:58:27,363 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:27,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:27,364 INFO L82 PathProgramCache]: Analyzing trace with hash 902578261, now seen corresponding path program 127 times [2021-06-05 07:58:27,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:27,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746684800] [2021-06-05 07:58:27,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:27,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:27,501 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 07:58:27,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:27,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746684800] [2021-06-05 07:58:27,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746684800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:27,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362697164] [2021-06-05 07:58:27,501 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 07:58:27,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:27,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:58:27,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:27,692 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 07:58:27,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362697164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:27,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:27,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 07:58:27,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037046389] [2021-06-05 07:58:27,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:58:27,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:27,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:58:27,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:58:27,693 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 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 07:58:28,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:28,267 INFO L93 Difference]: Finished difference Result 4471 states and 11897 transitions. [2021-06-05 07:58:28,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:58:28,267 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 07:58:28,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:28,272 INFO L225 Difference]: With dead ends: 4471 [2021-06-05 07:58:28,272 INFO L226 Difference]: Without dead ends: 4201 [2021-06-05 07:58:28,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 555.4ms TimeCoverageRelationStatistics Valid=747, Invalid=2223, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 07:58:28,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-06-05 07:58:28,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 3528. [2021-06-05 07:58:28,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:28,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-05 07:58:28,308 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-05 07:58:28,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:28,308 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-05 07:58:28,308 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 07:58:28,308 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-05 07:58:28,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:58:28,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:28,311 INFO L521 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 07:58:28,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:28,511 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:28,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:28,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1516817731, now seen corresponding path program 128 times [2021-06-05 07:58:28,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:28,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144338718] [2021-06-05 07:58:28,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:28,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:28,671 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 07:58:28,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:28,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144338718] [2021-06-05 07:58:28,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144338718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:28,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588755704] [2021-06-05 07:58:28,671 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 07:58:28,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:58:28,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:28,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:58:28,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:28,847 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 07:58:28,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588755704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:28,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:28,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 07:58:28,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953254167] [2021-06-05 07:58:28,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:58:28,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:28,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:58:28,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:58:28,848 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 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 07:58:29,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:29,331 INFO L93 Difference]: Finished difference Result 4421 states and 11797 transitions. [2021-06-05 07:58:29,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 07:58:29,332 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 07:58:29,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:29,337 INFO L225 Difference]: With dead ends: 4421 [2021-06-05 07:58:29,337 INFO L226 Difference]: Without dead ends: 4151 [2021-06-05 07:58:29,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 489.9ms TimeCoverageRelationStatistics Valid=734, Invalid=2022, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:58:29,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-06-05 07:58:29,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3528. [2021-06-05 07:58:29,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:29,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-05 07:58:29,374 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-05 07:58:29,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:29,374 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-05 07:58:29,374 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 07:58:29,374 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-05 07:58:29,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:58:29,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:29,377 INFO L521 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 07:58:29,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 07:58:29,577 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:29,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:29,578 INFO L82 PathProgramCache]: Analyzing trace with hash -198424557, now seen corresponding path program 129 times [2021-06-05 07:58:29,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:29,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301630610] [2021-06-05 07:58:29,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:29,727 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 07:58:29,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:29,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301630610] [2021-06-05 07:58:29,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301630610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:29,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805957185] [2021-06-05 07:58:29,728 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 07:58:29,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 07:58:29,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:29,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:58:29,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:29,942 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 07:58:29,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805957185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:29,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:29,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 07:58:29,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744409347] [2021-06-05 07:58:29,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:58:29,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:29,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:58:29,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:58:29,944 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 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 07:58:30,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:30,654 INFO L93 Difference]: Finished difference Result 4431 states and 11847 transitions. [2021-06-05 07:58:30,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 07:58:30,655 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 07:58:30,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:30,659 INFO L225 Difference]: With dead ends: 4431 [2021-06-05 07:58:30,659 INFO L226 Difference]: Without dead ends: 4161 [2021-06-05 07:58:30,659 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 678.9ms TimeCoverageRelationStatistics Valid=843, Invalid=2349, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:58:30,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4161 states. [2021-06-05 07:58:30,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4161 to 3528. [2021-06-05 07:58:30,687 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 07:58:30,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9888 transitions. [2021-06-05 07:58:30,692 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9888 transitions. Word has length 110 [2021-06-05 07:58:30,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:30,692 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9888 transitions. [2021-06-05 07:58:30,692 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 07:58:30,692 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9888 transitions. [2021-06-05 07:58:30,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:58:30,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:30,694 INFO L521 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 07:58:30,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-05 07:58:30,895 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:30,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:30,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1231072159, now seen corresponding path program 130 times [2021-06-05 07:58:30,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:30,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574581222] [2021-06-05 07:58:30,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:30,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:31,039 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 07:58:31,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:31,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574581222] [2021-06-05 07:58:31,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574581222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:31,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499841547] [2021-06-05 07:58:31,040 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 07:58:31,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:58:31,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:31,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:58:31,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:31,218 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 07:58:31,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499841547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:31,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:31,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 07:58:31,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357869838] [2021-06-05 07:58:31,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:58:31,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:31,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:58:31,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:58:31,219 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 07:58:31,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:31,747 INFO L93 Difference]: Finished difference Result 5198 states and 14021 transitions. [2021-06-05 07:58:31,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 07:58:31,747 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 07:58:31,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:31,751 INFO L225 Difference]: With dead ends: 5198 [2021-06-05 07:58:31,751 INFO L226 Difference]: Without dead ends: 4928 [2021-06-05 07:58:31,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 487.4ms TimeCoverageRelationStatistics Valid=839, Invalid=2131, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 07:58:31,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4928 states. [2021-06-05 07:58:31,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4928 to 3708. [2021-06-05 07:58:31,781 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 07:58:31,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 10447 transitions. [2021-06-05 07:58:31,785 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 10447 transitions. Word has length 110 [2021-06-05 07:58:31,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:31,785 INFO L482 AbstractCegarLoop]: Abstraction has 3708 states and 10447 transitions. [2021-06-05 07:58:31,785 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 07:58:31,785 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 10447 transitions. [2021-06-05 07:58:31,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:58:31,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:31,788 INFO L521 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 07:58:31,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 07:58:31,993 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:31,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:31,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1208728909, now seen corresponding path program 131 times [2021-06-05 07:58:31,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:31,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048065018] [2021-06-05 07:58:31,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:31,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:32,156 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 07:58:32,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:32,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048065018] [2021-06-05 07:58:32,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048065018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:32,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020069168] [2021-06-05 07:58:32,157 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 07:58:32,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 07:58:32,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:32,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:58:32,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:32,363 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 07:58:32,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020069168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:32,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:32,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 07:58:32,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032776151] [2021-06-05 07:58:32,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:58:32,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:32,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:58:32,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:58:32,365 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 07:58:33,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:33,171 INFO L93 Difference]: Finished difference Result 5021 states and 13521 transitions. [2021-06-05 07:58:33,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:58:33,172 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 07:58:33,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:33,176 INFO L225 Difference]: With dead ends: 5021 [2021-06-05 07:58:33,176 INFO L226 Difference]: Without dead ends: 4446 [2021-06-05 07:58:33,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 763.8ms TimeCoverageRelationStatistics Valid=997, Invalid=2785, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 07:58:33,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4446 states. [2021-06-05 07:58:33,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4446 to 2603. [2021-06-05 07:58:33,202 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 07:58:33,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7118 transitions. [2021-06-05 07:58:33,205 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7118 transitions. Word has length 110 [2021-06-05 07:58:33,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:33,206 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7118 transitions. [2021-06-05 07:58:33,206 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 07:58:33,206 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7118 transitions. [2021-06-05 07:58:33,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 07:58:33,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:33,207 INFO L521 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 07:58:33,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:33,408 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:33,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:33,408 INFO L82 PathProgramCache]: Analyzing trace with hash -207372468, now seen corresponding path program 132 times [2021-06-05 07:58:33,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:33,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063700670] [2021-06-05 07:58:33,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:33,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:33,603 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 07:58:33,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:33,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063700670] [2021-06-05 07:58:33,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063700670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:33,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632475319] [2021-06-05 07:58:33,603 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 07:58:33,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 07:58:33,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:33,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:58:33,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:33,790 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 07:58:33,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632475319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:33,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:33,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-05 07:58:33,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721889114] [2021-06-05 07:58:33,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:58:33,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:33,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:58:33,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:58:33,791 INFO L87 Difference]: Start difference. First operand 2603 states and 7118 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:34,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:34,118 INFO L93 Difference]: Finished difference Result 3821 states and 9757 transitions. [2021-06-05 07:58:34,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:58:34,119 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have 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 07:58:34,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:34,122 INFO L225 Difference]: With dead ends: 3821 [2021-06-05 07:58:34,122 INFO L226 Difference]: Without dead ends: 3551 [2021-06-05 07:58:34,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 379.5ms TimeCoverageRelationStatistics Valid=479, Invalid=1413, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:58:34,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3551 states. [2021-06-05 07:58:34,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3551 to 2678. [2021-06-05 07:58:34,145 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 07:58:34,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 7343 transitions. [2021-06-05 07:58:34,148 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 7343 transitions. Word has length 115 [2021-06-05 07:58:34,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:34,148 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 7343 transitions. [2021-06-05 07:58:34,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:34,148 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 7343 transitions. [2021-06-05 07:58:34,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 07:58:34,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:34,165 INFO L521 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 07:58:34,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:34,366 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:34,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:34,366 INFO L82 PathProgramCache]: Analyzing trace with hash -587816420, now seen corresponding path program 133 times [2021-06-05 07:58:34,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:34,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382085637] [2021-06-05 07:58:34,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:34,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:34,540 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 07:58:34,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:34,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382085637] [2021-06-05 07:58:34,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382085637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:34,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954442802] [2021-06-05 07:58:34,540 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 07:58:34,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:34,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:58:34,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:34,734 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 07:58:34,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954442802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:34,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:34,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 07:58:34,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231293150] [2021-06-05 07:58:34,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:58:34,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:34,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:58:34,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:58:34,735 INFO L87 Difference]: Start difference. First operand 2678 states and 7343 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 07:58:35,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:35,099 INFO L93 Difference]: Finished difference Result 4241 states and 10672 transitions. [2021-06-05 07:58:35,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:58:35,100 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 07:58:35,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:35,103 INFO L225 Difference]: With dead ends: 4241 [2021-06-05 07:58:35,103 INFO L226 Difference]: Without dead ends: 3971 [2021-06-05 07:58:35,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 412.8ms TimeCoverageRelationStatistics Valid=529, Invalid=1633, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:58:35,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3971 states. [2021-06-05 07:58:35,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3971 to 2753. [2021-06-05 07:58:35,128 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 07:58:35,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7568 transitions. [2021-06-05 07:58:35,131 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7568 transitions. Word has length 115 [2021-06-05 07:58:35,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:35,132 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7568 transitions. [2021-06-05 07:58:35,132 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 07:58:35,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7568 transitions. [2021-06-05 07:58:35,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 07:58:35,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:35,134 INFO L521 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 07:58:35,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:35,334 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:35,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:35,334 INFO L82 PathProgramCache]: Analyzing trace with hash 36558730, now seen corresponding path program 134 times [2021-06-05 07:58:35,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:35,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943571101] [2021-06-05 07:58:35,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:35,494 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 07:58:35,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:35,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943571101] [2021-06-05 07:58:35,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943571101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:35,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766550595] [2021-06-05 07:58:35,494 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 07:58:35,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:58:35,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:35,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:58:35,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:35,673 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 07:58:35,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766550595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:35,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:35,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-05 07:58:35,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987020820] [2021-06-05 07:58:35,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:58:35,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:35,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:58:35,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:58:35,675 INFO L87 Difference]: Start difference. First operand 2753 states and 7568 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:36,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:36,030 INFO L93 Difference]: Finished difference Result 4271 states and 10807 transitions. [2021-06-05 07:58:36,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:58:36,031 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have 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 07:58:36,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:36,035 INFO L225 Difference]: With dead ends: 4271 [2021-06-05 07:58:36,035 INFO L226 Difference]: Without dead ends: 4001 [2021-06-05 07:58:36,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 380.6ms TimeCoverageRelationStatistics Valid=531, Invalid=1631, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:58:36,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2021-06-05 07:58:36,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 2828. [2021-06-05 07:58:36,061 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 07:58:36,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7793 transitions. [2021-06-05 07:58:36,065 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7793 transitions. Word has length 115 [2021-06-05 07:58:36,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:36,065 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7793 transitions. [2021-06-05 07:58:36,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:36,065 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7793 transitions. [2021-06-05 07:58:36,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 07:58:36,067 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:36,067 INFO L521 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 07:58:36,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-06-05 07:58:36,268 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:36,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:36,268 INFO L82 PathProgramCache]: Analyzing trace with hash 845610586, now seen corresponding path program 135 times [2021-06-05 07:58:36,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:36,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188906436] [2021-06-05 07:58:36,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:36,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:36,439 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 07:58:36,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:36,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188906436] [2021-06-05 07:58:36,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188906436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:36,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586613350] [2021-06-05 07:58:36,439 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 07:58:36,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 07:58:36,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:36,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:58:36,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:36,654 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 07:58:36,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586613350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:36,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:36,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 07:58:36,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286357197] [2021-06-05 07:58:36,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:58:36,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:36,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:58:36,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:58:36,655 INFO L87 Difference]: Start difference. First operand 2828 states and 7793 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 07:58:37,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:37,093 INFO L93 Difference]: Finished difference Result 4296 states and 10932 transitions. [2021-06-05 07:58:37,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:58:37,094 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 07:58:37,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:37,098 INFO L225 Difference]: With dead ends: 4296 [2021-06-05 07:58:37,098 INFO L226 Difference]: Without dead ends: 4026 [2021-06-05 07:58:37,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 452.4ms TimeCoverageRelationStatistics Valid=553, Invalid=1799, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:58:37,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-06-05 07:58:37,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 2903. [2021-06-05 07:58:37,127 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 07:58:37,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 8018 transitions. [2021-06-05 07:58:37,130 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 8018 transitions. Word has length 115 [2021-06-05 07:58:37,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:37,130 INFO L482 AbstractCegarLoop]: Abstraction has 2903 states and 8018 transitions. [2021-06-05 07:58:37,130 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 07:58:37,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 8018 transitions. [2021-06-05 07:58:37,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 07:58:37,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:37,133 INFO L521 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 07:58:37,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:37,333 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:37,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:37,333 INFO L82 PathProgramCache]: Analyzing trace with hash -546339512, now seen corresponding path program 136 times [2021-06-05 07:58:37,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:37,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630663641] [2021-06-05 07:58:37,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:37,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:37,513 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 07:58:37,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:37,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630663641] [2021-06-05 07:58:37,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630663641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:37,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082553429] [2021-06-05 07:58:37,513 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 07:58:37,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:58:37,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:37,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:58:37,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:37,691 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 07:58:37,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082553429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:37,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:37,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-05 07:58:37,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891810253] [2021-06-05 07:58:37,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:58:37,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:37,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:58:37,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:58:37,692 INFO L87 Difference]: Start difference. First operand 2903 states and 8018 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:38,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:38,076 INFO L93 Difference]: Finished difference Result 4321 states and 11057 transitions. [2021-06-05 07:58:38,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:58:38,077 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have 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 07:58:38,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:38,080 INFO L225 Difference]: With dead ends: 4321 [2021-06-05 07:58:38,080 INFO L226 Difference]: Without dead ends: 4051 [2021-06-05 07:58:38,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 416.4ms TimeCoverageRelationStatistics Valid=569, Invalid=1783, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:58:38,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-06-05 07:58:38,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 2978. [2021-06-05 07:58:38,106 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 07:58:38,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 8243 transitions. [2021-06-05 07:58:38,109 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 8243 transitions. Word has length 115 [2021-06-05 07:58:38,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:38,109 INFO L482 AbstractCegarLoop]: Abstraction has 2978 states and 8243 transitions. [2021-06-05 07:58:38,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:38,110 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 8243 transitions. [2021-06-05 07:58:38,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 07:58:38,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:38,112 INFO L521 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 07:58:38,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 07:58:38,312 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:38,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:38,312 INFO L82 PathProgramCache]: Analyzing trace with hash -791416808, now seen corresponding path program 137 times [2021-06-05 07:58:38,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:38,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883027377] [2021-06-05 07:58:38,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:38,477 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 07:58:38,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:38,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883027377] [2021-06-05 07:58:38,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883027377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:38,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020463551] [2021-06-05 07:58:38,478 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 07:58:38,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 07:58:38,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:38,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:58:38,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:38,670 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 07:58:38,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020463551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:38,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:38,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 07:58:38,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713037803] [2021-06-05 07:58:38,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:58:38,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:38,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:58:38,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:58:38,672 INFO L87 Difference]: Start difference. First operand 2978 states and 8243 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 07:58:39,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:39,291 INFO L93 Difference]: Finished difference Result 4346 states and 11182 transitions. [2021-06-05 07:58:39,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:58:39,291 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 07:58:39,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:39,295 INFO L225 Difference]: With dead ends: 4346 [2021-06-05 07:58:39,295 INFO L226 Difference]: Without dead ends: 4076 [2021-06-05 07:58:39,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 569.9ms TimeCoverageRelationStatistics Valid=593, Invalid=1957, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:58:39,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-05 07:58:39,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3053. [2021-06-05 07:58:39,324 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 07:58:39,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 8468 transitions. [2021-06-05 07:58:39,328 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 8468 transitions. Word has length 115 [2021-06-05 07:58:39,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:39,328 INFO L482 AbstractCegarLoop]: Abstraction has 3053 states and 8468 transitions. [2021-06-05 07:58:39,332 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 07:58:39,333 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 8468 transitions. [2021-06-05 07:58:39,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 07:58:39,336 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:39,336 INFO L521 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 07:58:39,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:39,559 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:39,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:39,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1168267130, now seen corresponding path program 138 times [2021-06-05 07:58:39,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:39,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466316788] [2021-06-05 07:58:39,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:39,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:39,727 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 07:58:39,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:39,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466316788] [2021-06-05 07:58:39,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466316788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:39,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457861371] [2021-06-05 07:58:39,728 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 07:58:39,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 07:58:39,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:39,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:58:39,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:39,922 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 07:58:39,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457861371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:39,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:39,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-05 07:58:39,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834844769] [2021-06-05 07:58:39,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:58:39,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:39,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:58:39,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:58:39,923 INFO L87 Difference]: Start difference. First operand 3053 states and 8468 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:40,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:40,344 INFO L93 Difference]: Finished difference Result 4371 states and 11307 transitions. [2021-06-05 07:58:40,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:58:40,345 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have 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 07:58:40,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:40,349 INFO L225 Difference]: With dead ends: 4371 [2021-06-05 07:58:40,349 INFO L226 Difference]: Without dead ends: 4101 [2021-06-05 07:58:40,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 429.6ms TimeCoverageRelationStatistics Valid=623, Invalid=1927, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:58:40,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4101 states. [2021-06-05 07:58:40,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4101 to 3128. [2021-06-05 07:58:40,379 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 07:58:40,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 8693 transitions. [2021-06-05 07:58:40,383 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 8693 transitions. Word has length 115 [2021-06-05 07:58:40,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:40,383 INFO L482 AbstractCegarLoop]: Abstraction has 3128 states and 8693 transitions. [2021-06-05 07:58:40,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:40,383 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 8693 transitions. [2021-06-05 07:58:40,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 07:58:40,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:40,385 INFO L521 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 07:58:40,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 07:58:40,586 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:40,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:40,586 INFO L82 PathProgramCache]: Analyzing trace with hash 158488406, now seen corresponding path program 139 times [2021-06-05 07:58:40,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:40,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712378333] [2021-06-05 07:58:40,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:40,738 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 07:58:40,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:40,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712378333] [2021-06-05 07:58:40,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712378333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:40,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739073262] [2021-06-05 07:58:40,738 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 07:58:40,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:40,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:58:40,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:40,927 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 07:58:40,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739073262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:40,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:40,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 07:58:40,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606333453] [2021-06-05 07:58:40,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:58:40,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:40,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:58:40,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:58:40,928 INFO L87 Difference]: Start difference. First operand 3128 states and 8693 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 07:58:41,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:41,446 INFO L93 Difference]: Finished difference Result 4396 states and 11432 transitions. [2021-06-05 07:58:41,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 07:58:41,446 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 07:58:41,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:41,450 INFO L225 Difference]: With dead ends: 4396 [2021-06-05 07:58:41,450 INFO L226 Difference]: Without dead ends: 4126 [2021-06-05 07:58:41,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 509.0ms TimeCoverageRelationStatistics Valid=649, Invalid=2107, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:58:41,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-06-05 07:58:41,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 3203. [2021-06-05 07:58:41,501 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 07:58:41,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8918 transitions. [2021-06-05 07:58:41,505 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8918 transitions. Word has length 115 [2021-06-05 07:58:41,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:41,505 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8918 transitions. [2021-06-05 07:58:41,505 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 07:58:41,505 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8918 transitions. [2021-06-05 07:58:41,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 07:58:41,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:41,507 INFO L521 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 07:58:41,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 07:58:41,709 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:41,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:41,709 INFO L82 PathProgramCache]: Analyzing trace with hash 612704580, now seen corresponding path program 140 times [2021-06-05 07:58:41,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:41,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022220845] [2021-06-05 07:58:41,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:41,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:41,853 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 07:58:41,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:41,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022220845] [2021-06-05 07:58:41,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022220845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:41,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597608959] [2021-06-05 07:58:41,854 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 07:58:41,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:58:41,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:41,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:58:41,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:42,042 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 07:58:42,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597608959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:42,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:42,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-05 07:58:42,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231015308] [2021-06-05 07:58:42,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:58:42,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:42,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:58:42,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:58:42,044 INFO L87 Difference]: Start difference. First operand 3203 states and 8918 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:42,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:42,514 INFO L93 Difference]: Finished difference Result 4421 states and 11557 transitions. [2021-06-05 07:58:42,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 07:58:42,514 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have 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 07:58:42,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:42,518 INFO L225 Difference]: With dead ends: 4421 [2021-06-05 07:58:42,518 INFO L226 Difference]: Without dead ends: 4151 [2021-06-05 07:58:42,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 446.6ms TimeCoverageRelationStatistics Valid=693, Invalid=2063, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:58:42,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-06-05 07:58:42,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3278. [2021-06-05 07:58:42,549 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 07:58:42,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 9143 transitions. [2021-06-05 07:58:42,553 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 9143 transitions. Word has length 115 [2021-06-05 07:58:42,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:42,553 INFO L482 AbstractCegarLoop]: Abstraction has 3278 states and 9143 transitions. [2021-06-05 07:58:42,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:42,553 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 9143 transitions. [2021-06-05 07:58:42,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 07:58:42,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:42,555 INFO L521 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 07:58:42,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:42,756 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:42,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:42,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1611600916, now seen corresponding path program 141 times [2021-06-05 07:58:42,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:42,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774822154] [2021-06-05 07:58:42,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:42,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:42,906 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 07:58:42,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:42,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774822154] [2021-06-05 07:58:42,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774822154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:42,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518122470] [2021-06-05 07:58:42,907 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 07:58:42,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 07:58:42,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:42,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:58:42,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:43,100 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 07:58:43,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518122470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:43,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:43,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 07:58:43,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802263758] [2021-06-05 07:58:43,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:58:43,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:43,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:58:43,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:58:43,101 INFO L87 Difference]: Start difference. First operand 3278 states and 9143 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 07:58:43,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:43,674 INFO L93 Difference]: Finished difference Result 4446 states and 11682 transitions. [2021-06-05 07:58:43,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:58:43,674 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 07:58:43,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:43,678 INFO L225 Difference]: With dead ends: 4446 [2021-06-05 07:58:43,678 INFO L226 Difference]: Without dead ends: 4176 [2021-06-05 07:58:43,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 548.1ms TimeCoverageRelationStatistics Valid=721, Invalid=2249, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 07:58:43,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-06-05 07:58:43,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 3353. [2021-06-05 07:58:43,709 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 07:58:43,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9368 transitions. [2021-06-05 07:58:43,713 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9368 transitions. Word has length 115 [2021-06-05 07:58:43,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:43,713 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9368 transitions. [2021-06-05 07:58:43,714 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 07:58:43,714 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9368 transitions. [2021-06-05 07:58:43,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 07:58:43,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:43,716 INFO L521 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 07:58:43,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 07:58:43,921 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:43,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:43,921 INFO L82 PathProgramCache]: Analyzing trace with hash -267726974, now seen corresponding path program 142 times [2021-06-05 07:58:43,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:43,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271167053] [2021-06-05 07:58:43,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:43,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:44,078 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 07:58:44,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:44,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271167053] [2021-06-05 07:58:44,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271167053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:44,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855705889] [2021-06-05 07:58:44,079 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 07:58:44,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:58:44,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:44,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:58:44,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:44,251 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 07:58:44,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855705889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:44,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:44,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-05 07:58:44,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610081154] [2021-06-05 07:58:44,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:58:44,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:44,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:58:44,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:58:44,252 INFO L87 Difference]: Start difference. First operand 3353 states and 9368 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:44,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:44,728 INFO L93 Difference]: Finished difference Result 4471 states and 11807 transitions. [2021-06-05 07:58:44,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 07:58:44,729 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have 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 07:58:44,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:44,733 INFO L225 Difference]: With dead ends: 4471 [2021-06-05 07:58:44,733 INFO L226 Difference]: Without dead ends: 4201 [2021-06-05 07:58:44,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 475.0ms TimeCoverageRelationStatistics Valid=779, Invalid=2191, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 07:58:44,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-06-05 07:58:44,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 3428. [2021-06-05 07:58:44,765 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 07:58:44,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9593 transitions. [2021-06-05 07:58:44,769 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9593 transitions. Word has length 115 [2021-06-05 07:58:44,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:44,769 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9593 transitions. [2021-06-05 07:58:44,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:44,769 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9593 transitions. [2021-06-05 07:58:44,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 07:58:44,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:44,772 INFO L521 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 07:58:44,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:44,972 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:44,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:44,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1762592338, now seen corresponding path program 143 times [2021-06-05 07:58:44,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:44,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749355507] [2021-06-05 07:58:44,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:44,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:45,118 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 07:58:45,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:45,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749355507] [2021-06-05 07:58:45,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749355507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:45,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57431477] [2021-06-05 07:58:45,119 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 07:58:45,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 07:58:45,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:45,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:58:45,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:45,305 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 07:58:45,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57431477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:45,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:45,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 07:58:45,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010046828] [2021-06-05 07:58:45,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:58:45,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:45,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:58:45,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:58:45,306 INFO L87 Difference]: Start difference. First operand 3428 states and 9593 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 07:58:45,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:45,912 INFO L93 Difference]: Finished difference Result 4496 states and 11932 transitions. [2021-06-05 07:58:45,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 07:58:45,912 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 07:58:45,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:45,916 INFO L225 Difference]: With dead ends: 4496 [2021-06-05 07:58:45,916 INFO L226 Difference]: Without dead ends: 4226 [2021-06-05 07:58:45,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 572.5ms TimeCoverageRelationStatistics Valid=809, Invalid=2383, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:58:45,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-06-05 07:58:45,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3503. [2021-06-05 07:58:45,950 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 07:58:45,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9818 transitions. [2021-06-05 07:58:45,954 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9818 transitions. Word has length 115 [2021-06-05 07:58:45,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:45,954 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9818 transitions. [2021-06-05 07:58:45,954 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 07:58:45,954 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9818 transitions. [2021-06-05 07:58:45,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 07:58:45,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:45,957 INFO L521 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 07:58:46,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:46,158 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:46,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:46,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1918135488, now seen corresponding path program 144 times [2021-06-05 07:58:46,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:46,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705395845] [2021-06-05 07:58:46,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:46,296 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 07:58:46,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:46,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705395845] [2021-06-05 07:58:46,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705395845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:46,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341100519] [2021-06-05 07:58:46,297 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 07:58:46,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 07:58:46,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:46,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:58:46,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:46,514 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 07:58:46,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341100519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:46,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:46,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-05 07:58:46,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227277284] [2021-06-05 07:58:46,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:58:46,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:46,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:58:46,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:58:46,515 INFO L87 Difference]: Start difference. First operand 3503 states and 9818 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:47,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:47,025 INFO L93 Difference]: Finished difference Result 4566 states and 12177 transitions. [2021-06-05 07:58:47,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 07:58:47,025 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have 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 07:58:47,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:47,030 INFO L225 Difference]: With dead ends: 4566 [2021-06-05 07:58:47,030 INFO L226 Difference]: Without dead ends: 4296 [2021-06-05 07:58:47,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 480.6ms TimeCoverageRelationStatistics Valid=881, Invalid=2311, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:58:47,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4296 states. [2021-06-05 07:58:47,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4296 to 3578. [2021-06-05 07:58:47,064 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 07:58:47,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 10058 transitions. [2021-06-05 07:58:47,068 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 10058 transitions. Word has length 115 [2021-06-05 07:58:47,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:47,068 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 10058 transitions. [2021-06-05 07:58:47,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:47,069 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 10058 transitions. [2021-06-05 07:58:47,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 07:58:47,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:47,071 INFO L521 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 07:58:47,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:47,272 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:47,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:47,272 INFO L82 PathProgramCache]: Analyzing trace with hash 661589520, now seen corresponding path program 145 times [2021-06-05 07:58:47,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:47,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959175739] [2021-06-05 07:58:47,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:47,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:47,423 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 07:58:47,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:47,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959175739] [2021-06-05 07:58:47,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959175739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:47,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072950718] [2021-06-05 07:58:47,424 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 07:58:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:47,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:58:47,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:47,606 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 07:58:47,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072950718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:47,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:47,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 07:58:47,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372148717] [2021-06-05 07:58:47,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:58:47,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:47,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:58:47,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:58:47,607 INFO L87 Difference]: Start difference. First operand 3578 states and 10058 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 07:58:48,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:48,299 INFO L93 Difference]: Finished difference Result 5144 states and 13803 transitions. [2021-06-05 07:58:48,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 07:58:48,300 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 07:58:48,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:48,304 INFO L225 Difference]: With dead ends: 5144 [2021-06-05 07:58:48,305 INFO L226 Difference]: Without dead ends: 4521 [2021-06-05 07:58:48,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 632.6ms TimeCoverageRelationStatistics Valid=934, Invalid=2726, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 07:58:48,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4521 states. [2021-06-05 07:58:48,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4521 to 3653. [2021-06-05 07:58:48,336 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 07:58:48,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10288 transitions. [2021-06-05 07:58:48,340 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10288 transitions. Word has length 115 [2021-06-05 07:58:48,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:48,340 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10288 transitions. [2021-06-05 07:58:48,340 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 07:58:48,340 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10288 transitions. [2021-06-05 07:58:48,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 07:58:48,343 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:48,343 INFO L521 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 07:58:48,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:48,544 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:48,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:48,544 INFO L82 PathProgramCache]: Analyzing trace with hash -371058082, now seen corresponding path program 146 times [2021-06-05 07:58:48,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:48,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519158485] [2021-06-05 07:58:48,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:48,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:48,682 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 07:58:48,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:48,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519158485] [2021-06-05 07:58:48,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519158485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:48,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664111086] [2021-06-05 07:58:48,682 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 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 07:58:48,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:58:48,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:48,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:58:48,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:48,875 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 07:58:48,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664111086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:48,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:48,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-05 07:58:48,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882648694] [2021-06-05 07:58:48,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:58:48,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:48,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:58:48,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:58:48,876 INFO L87 Difference]: Start difference. First operand 3653 states and 10288 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:49,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:49,420 INFO L93 Difference]: Finished difference Result 5348 states and 14471 transitions. [2021-06-05 07:58:49,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 07:58:49,420 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have 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 07:58:49,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:49,425 INFO L225 Difference]: With dead ends: 5348 [2021-06-05 07:58:49,425 INFO L226 Difference]: Without dead ends: 5078 [2021-06-05 07:58:49,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 504.8ms TimeCoverageRelationStatistics Valid=1000, Invalid=2422, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 07:58:49,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5078 states. [2021-06-05 07:58:49,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5078 to 3833. [2021-06-05 07:58:49,458 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 07:58:49,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 10847 transitions. [2021-06-05 07:58:49,463 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 10847 transitions. Word has length 115 [2021-06-05 07:58:49,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:49,463 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 10847 transitions. [2021-06-05 07:58:49,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:49,463 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 10847 transitions. [2021-06-05 07:58:49,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 07:58:49,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:49,466 INFO L521 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 07:58:49,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-06-05 07:58:49,666 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:49,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:49,666 INFO L82 PathProgramCache]: Analyzing trace with hash -348714832, now seen corresponding path program 147 times [2021-06-05 07:58:49,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:49,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780983978] [2021-06-05 07:58:49,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:49,847 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 07:58:49,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:49,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780983978] [2021-06-05 07:58:49,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780983978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:49,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913460963] [2021-06-05 07:58:49,847 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 07:58:49,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 07:58:49,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:49,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:58:49,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:50,084 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 07:58:50,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913460963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:50,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:50,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 07:58:50,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913492917] [2021-06-05 07:58:50,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:58:50,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:50,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:58:50,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:58:50,085 INFO L87 Difference]: Start difference. First operand 3833 states and 10847 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 07:58:50,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:50,804 INFO L93 Difference]: Finished difference Result 4810 states and 13121 transitions. [2021-06-05 07:58:50,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 07:58:50,805 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 07:58:50,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:50,809 INFO L225 Difference]: With dead ends: 4810 [2021-06-05 07:58:50,809 INFO L226 Difference]: Without dead ends: 4321 [2021-06-05 07:58:50,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 701.7ms TimeCoverageRelationStatistics Valid=1036, Invalid=2624, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 07:58:50,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4321 states. [2021-06-05 07:58:50,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4321 to 3778. [2021-06-05 07:58:50,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3778 states, 3777 states have (on average 2.8284352660841936) internal successors, (10683), 3777 states have internal predecessors, (10683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:50,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3778 states to 3778 states and 10683 transitions. [2021-06-05 07:58:50,845 INFO L78 Accepts]: Start accepts. Automaton has 3778 states and 10683 transitions. Word has length 115 [2021-06-05 07:58:50,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:50,845 INFO L482 AbstractCegarLoop]: Abstraction has 3778 states and 10683 transitions. [2021-06-05 07:58:50,845 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 07:58:50,845 INFO L276 IsEmpty]: Start isEmpty. Operand 3778 states and 10683 transitions. [2021-06-05 07:58:50,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:58:50,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:50,848 INFO L521 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 07:58:51,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 07:58:51,049 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:51,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:51,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1146705884, now seen corresponding path program 148 times [2021-06-05 07:58:51,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:51,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643369293] [2021-06-05 07:58:51,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:51,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:51,255 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 07:58:51,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:51,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643369293] [2021-06-05 07:58:51,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643369293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:51,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451659117] [2021-06-05 07:58:51,256 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 07:58:51,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:58:51,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:51,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:58:51,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:51,510 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 07:58:51,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451659117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:51,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:51,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-06-05 07:58:51,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788710234] [2021-06-05 07:58:51,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:58:51,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:51,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:58:51,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:58:51,511 INFO L87 Difference]: Start difference. First operand 3778 states and 10683 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 07:58:51,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:51,913 INFO L93 Difference]: Finished difference Result 4868 states and 13183 transitions. [2021-06-05 07:58:51,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:58:51,913 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 07:58:51,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:51,918 INFO L225 Difference]: With dead ends: 4868 [2021-06-05 07:58:51,918 INFO L226 Difference]: Without dead ends: 4534 [2021-06-05 07:58:51,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 474.6ms TimeCoverageRelationStatistics Valid=645, Invalid=1805, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:58:51,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4534 states. [2021-06-05 07:58:51,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4534 to 3863. [2021-06-05 07:58:51,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3863 states, 3862 states have (on average 2.810201967892284) internal successors, (10853), 3862 states have internal predecessors, (10853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:51,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3863 states to 3863 states and 10853 transitions. [2021-06-05 07:58:51,956 INFO L78 Accepts]: Start accepts. Automaton has 3863 states and 10853 transitions. Word has length 120 [2021-06-05 07:58:51,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:51,956 INFO L482 AbstractCegarLoop]: Abstraction has 3863 states and 10853 transitions. [2021-06-05 07:58:51,956 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 07:58:51,956 INFO L276 IsEmpty]: Start isEmpty. Operand 3863 states and 10853 transitions. [2021-06-05 07:58:51,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:58:51,959 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:51,959 INFO L521 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 07:58:52,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 07:58:52,159 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:52,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:52,160 INFO L82 PathProgramCache]: Analyzing trace with hash 51245472, now seen corresponding path program 149 times [2021-06-05 07:58:52,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:52,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296288339] [2021-06-05 07:58:52,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:52,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:52,350 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 07:58:52,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:52,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296288339] [2021-06-05 07:58:52,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296288339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:52,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218330066] [2021-06-05 07:58:52,351 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 07:58:52,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 07:58:52,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:52,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:58:52,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:52,545 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 07:58:52,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218330066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:52,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:52,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-05 07:58:52,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851544642] [2021-06-05 07:58:52,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:58:52,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:52,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:58:52,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:58:52,546 INFO L87 Difference]: Start difference. First operand 3863 states and 10853 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 07:58:52,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:52,870 INFO L93 Difference]: Finished difference Result 5561 states and 14377 transitions. [2021-06-05 07:58:52,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:58:52,871 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 07:58:52,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:52,876 INFO L225 Difference]: With dead ends: 5561 [2021-06-05 07:58:52,876 INFO L226 Difference]: Without dead ends: 5291 [2021-06-05 07:58:52,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 376.0ms TimeCoverageRelationStatistics Valid=512, Invalid=1380, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:58:52,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5291 states. [2021-06-05 07:58:52,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5291 to 3878. [2021-06-05 07:58:52,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:52,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-05 07:58:52,917 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-05 07:58:52,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:52,917 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-05 07:58:52,917 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 07:58:52,917 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-05 07:58:52,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:58:52,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:52,920 INFO L521 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 07:58:53,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 07:58:53,121 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:53,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:53,121 INFO L82 PathProgramCache]: Analyzing trace with hash -847277968, now seen corresponding path program 150 times [2021-06-05 07:58:53,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:53,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321059821] [2021-06-05 07:58:53,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:53,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:53,319 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 07:58:53,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:53,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321059821] [2021-06-05 07:58:53,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321059821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:53,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750253436] [2021-06-05 07:58:53,319 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 07:58:53,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 07:58:53,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:53,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:58:53,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:53,550 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 07:58:53,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750253436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:53,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:53,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 07:58:53,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634631836] [2021-06-05 07:58:53,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:58:53,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:53,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:58:53,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:58:53,551 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 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 07:58:53,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:53,934 INFO L93 Difference]: Finished difference Result 5446 states and 14147 transitions. [2021-06-05 07:58:53,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:58:53,934 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 07:58:53,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:53,939 INFO L225 Difference]: With dead ends: 5446 [2021-06-05 07:58:53,939 INFO L226 Difference]: Without dead ends: 5176 [2021-06-05 07:58:53,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 441.7ms TimeCoverageRelationStatistics Valid=575, Invalid=1681, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:58:53,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-06-05 07:58:53,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 3878. [2021-06-05 07:58:53,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:53,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-05 07:58:53,979 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-05 07:58:53,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:53,979 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-05 07:58:53,979 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 07:58:53,979 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-05 07:58:53,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:58:53,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:53,983 INFO L521 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 07:58:54,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 07:58:54,185 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:54,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:54,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1832735838, now seen corresponding path program 151 times [2021-06-05 07:58:54,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:54,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009745911] [2021-06-05 07:58:54,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:54,384 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 07:58:54,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:54,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009745911] [2021-06-05 07:58:54,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009745911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:54,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307446000] [2021-06-05 07:58:54,385 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 07:58:54,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:54,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:58:54,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:54,601 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 07:58:54,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307446000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:54,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:54,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-05 07:58:54,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028696334] [2021-06-05 07:58:54,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:58:54,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:54,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:58:54,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:58:54,602 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 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 07:58:54,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:54,974 INFO L93 Difference]: Finished difference Result 5421 states and 14097 transitions. [2021-06-05 07:58:54,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:58:54,975 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 07:58:54,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:54,980 INFO L225 Difference]: With dead ends: 5421 [2021-06-05 07:58:54,980 INFO L226 Difference]: Without dead ends: 5151 [2021-06-05 07:58:54,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 413.2ms TimeCoverageRelationStatistics Valid=519, Invalid=1551, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:58:54,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5151 states. [2021-06-05 07:58:55,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5151 to 3878. [2021-06-05 07:58:55,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:55,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-05 07:58:55,021 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-05 07:58:55,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:55,021 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-05 07:58:55,021 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 07:58:55,021 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-05 07:58:55,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:58:55,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:55,024 INFO L521 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 07:58:55,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 07:58:55,225 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:55,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:55,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1452291886, now seen corresponding path program 152 times [2021-06-05 07:58:55,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:55,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320862770] [2021-06-05 07:58:55,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:55,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:55,408 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 07:58:55,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:55,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320862770] [2021-06-05 07:58:55,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320862770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:55,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467887054] [2021-06-05 07:58:55,409 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 07:58:55,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:58:55,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:55,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:58:55,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:55,608 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 07:58:55,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467887054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:55,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:55,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 07:58:55,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476537153] [2021-06-05 07:58:55,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:58:55,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:55,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:58:55,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:58:55,609 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 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 07:58:56,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:56,069 INFO L93 Difference]: Finished difference Result 5371 states and 13997 transitions. [2021-06-05 07:58:56,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:58:56,069 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 07:58:56,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:56,074 INFO L225 Difference]: With dead ends: 5371 [2021-06-05 07:58:56,074 INFO L226 Difference]: Without dead ends: 5101 [2021-06-05 07:58:56,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 474.2ms TimeCoverageRelationStatistics Valid=590, Invalid=1860, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:58:56,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5101 states. [2021-06-05 07:58:56,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5101 to 3878. [2021-06-05 07:58:56,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:56,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-05 07:58:56,116 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-05 07:58:56,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:56,116 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-05 07:58:56,116 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 07:58:56,116 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-05 07:58:56,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:58:56,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:56,120 INFO L521 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 07:58:56,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:56,320 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:56,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:56,320 INFO L82 PathProgramCache]: Analyzing trace with hash 2076667036, now seen corresponding path program 153 times [2021-06-05 07:58:56,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:56,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373348061] [2021-06-05 07:58:56,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:56,487 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 07:58:56,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:56,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373348061] [2021-06-05 07:58:56,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373348061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:56,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084678490] [2021-06-05 07:58:56,488 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 07:58:56,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 07:58:56,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:56,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:58:56,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:56,682 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 07:58:56,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084678490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:56,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:56,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-05 07:58:56,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181077301] [2021-06-05 07:58:56,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:58:56,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:56,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:58:56,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:58:56,683 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 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 07:58:57,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:57,070 INFO L93 Difference]: Finished difference Result 5321 states and 13897 transitions. [2021-06-05 07:58:57,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:58:57,071 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 07:58:57,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:57,076 INFO L225 Difference]: With dead ends: 5321 [2021-06-05 07:58:57,076 INFO L226 Difference]: Without dead ends: 5051 [2021-06-05 07:58:57,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 409.2ms TimeCoverageRelationStatistics Valid=542, Invalid=1714, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:58:57,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2021-06-05 07:58:57,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 3878. [2021-06-05 07:58:57,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:57,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-05 07:58:57,120 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-05 07:58:57,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:57,121 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-05 07:58:57,121 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 07:58:57,121 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-05 07:58:57,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:58:57,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:57,124 INFO L521 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 07:58:57,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:57,326 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:57,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:57,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1409248404, now seen corresponding path program 154 times [2021-06-05 07:58:57,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:57,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532632651] [2021-06-05 07:58:57,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:57,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:57,518 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 07:58:57,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:57,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532632651] [2021-06-05 07:58:57,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532632651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:57,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867287695] [2021-06-05 07:58:57,518 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 07:58:57,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:58:57,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:57,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:58:57,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:57,716 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 07:58:57,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867287695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:57,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:57,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 07:58:57,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034125351] [2021-06-05 07:58:57,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:58:57,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:57,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:58:57,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:58:57,718 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 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 07:58:58,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:58,219 INFO L93 Difference]: Finished difference Result 5271 states and 13797 transitions. [2021-06-05 07:58:58,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:58:58,219 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 07:58:58,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:58,223 INFO L225 Difference]: With dead ends: 5271 [2021-06-05 07:58:58,223 INFO L226 Difference]: Without dead ends: 5001 [2021-06-05 07:58:58,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 535.2ms TimeCoverageRelationStatistics Valid=621, Invalid=2031, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:58:58,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5001 states. [2021-06-05 07:58:58,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5001 to 3878. [2021-06-05 07:58:58,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:58,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-05 07:58:58,261 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-05 07:58:58,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:58,261 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-05 07:58:58,261 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 07:58:58,262 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-05 07:58:58,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:58:58,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:58,264 INFO L521 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 07:58:58,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:58,465 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:58,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:58,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1493768794, now seen corresponding path program 155 times [2021-06-05 07:58:58,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:58,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493123630] [2021-06-05 07:58:58,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:58,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:58,653 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 07:58:58,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:58,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493123630] [2021-06-05 07:58:58,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493123630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:58,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311493520] [2021-06-05 07:58:58,654 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 07:58:58,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 07:58:58,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:58,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:58:58,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:58,859 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 07:58:58,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311493520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:58,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:58,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-05 07:58:58,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820439764] [2021-06-05 07:58:58,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:58:58,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:58,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:58:58,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:58:58,860 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 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 07:58:59,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:59,315 INFO L93 Difference]: Finished difference Result 5221 states and 13697 transitions. [2021-06-05 07:58:59,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:58:59,315 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 07:58:59,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:59,320 INFO L225 Difference]: With dead ends: 5221 [2021-06-05 07:58:59,320 INFO L226 Difference]: Without dead ends: 4951 [2021-06-05 07:58:59,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 462.1ms TimeCoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:58:59,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4951 states. [2021-06-05 07:58:59,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4951 to 3878. [2021-06-05 07:58:59,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:59,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-05 07:58:59,357 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-05 07:58:59,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:59,357 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-05 07:58:59,357 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 07:58:59,357 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-05 07:58:59,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:58:59,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:59,360 INFO L521 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 07:58:59,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:59,561 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:59,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:59,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1248691498, now seen corresponding path program 156 times [2021-06-05 07:58:59,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:59,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099729188] [2021-06-05 07:58:59,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:59,768 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 07:58:59,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:59,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099729188] [2021-06-05 07:58:59,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099729188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:59,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187113354] [2021-06-05 07:58:59,769 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 07:58:59,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 07:58:59,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:59,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:58:59,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:00,008 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 07:59:00,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187113354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:00,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:00,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 07:59:00,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77715205] [2021-06-05 07:59:00,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:59:00,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:00,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:59:00,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:59:00,010 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 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 07:59:00,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:00,552 INFO L93 Difference]: Finished difference Result 5171 states and 13597 transitions. [2021-06-05 07:59:00,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 07:59:00,553 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 07:59:00,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:00,557 INFO L225 Difference]: With dead ends: 5171 [2021-06-05 07:59:00,558 INFO L226 Difference]: Without dead ends: 4901 [2021-06-05 07:59:00,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 578.7ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:59:00,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4901 states. [2021-06-05 07:59:00,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4901 to 3878. [2021-06-05 07:59:00,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:00,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-05 07:59:00,610 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-05 07:59:00,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:00,611 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-05 07:59:00,611 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 07:59:00,611 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-05 07:59:00,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:59:00,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:00,613 INFO L521 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 07:59:00,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:00,814 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:00,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:00,814 INFO L82 PathProgramCache]: Analyzing trace with hash 871841176, now seen corresponding path program 157 times [2021-06-05 07:59:00,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:00,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962221927] [2021-06-05 07:59:00,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:00,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:00,970 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 07:59:00,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:00,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962221927] [2021-06-05 07:59:00,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962221927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:00,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869816749] [2021-06-05 07:59:00,970 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 07:59:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:01,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:59:01,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:01,150 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 07:59:01,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869816749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:01,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:01,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-05 07:59:01,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853937773] [2021-06-05 07:59:01,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:59:01,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:01,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:59:01,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:59:01,151 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 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 07:59:01,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:01,613 INFO L93 Difference]: Finished difference Result 5121 states and 13497 transitions. [2021-06-05 07:59:01,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:59:01,613 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 07:59:01,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:01,618 INFO L225 Difference]: With dead ends: 5121 [2021-06-05 07:59:01,618 INFO L226 Difference]: Without dead ends: 4851 [2021-06-05 07:59:01,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 452.2ms TimeCoverageRelationStatistics Valid=636, Invalid=2016, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:59:01,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4851 states. [2021-06-05 07:59:01,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4851 to 3878. [2021-06-05 07:59:01,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:01,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-05 07:59:01,655 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-05 07:59:01,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:01,655 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-05 07:59:01,655 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 07:59:01,655 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-05 07:59:01,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:59:01,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:01,658 INFO L521 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 07:59:01,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:01,859 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:01,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:01,859 INFO L82 PathProgramCache]: Analyzing trace with hash -2096370584, now seen corresponding path program 158 times [2021-06-05 07:59:01,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:01,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127077299] [2021-06-05 07:59:01,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:02,021 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 07:59:02,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:02,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127077299] [2021-06-05 07:59:02,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127077299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:02,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326743649] [2021-06-05 07:59:02,021 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 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 07:59:02,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:59:02,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:02,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:59:02,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:02,223 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 07:59:02,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326743649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:02,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:02,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 07:59:02,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97714759] [2021-06-05 07:59:02,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:59:02,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:02,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:59:02,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:59:02,224 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 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 07:59:02,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:02,834 INFO L93 Difference]: Finished difference Result 5071 states and 13397 transitions. [2021-06-05 07:59:02,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:59:02,835 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 07:59:02,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:02,839 INFO L225 Difference]: With dead ends: 5071 [2021-06-05 07:59:02,840 INFO L226 Difference]: Without dead ends: 4801 [2021-06-05 07:59:02,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 573.9ms TimeCoverageRelationStatistics Valid=731, Invalid=2349, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:59:02,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4801 states. [2021-06-05 07:59:02,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4801 to 3878. [2021-06-05 07:59:02,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:02,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-05 07:59:02,921 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-05 07:59:02,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:02,921 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-05 07:59:02,921 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 07:59:02,921 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-05 07:59:02,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:59:02,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:02,924 INFO L521 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 07:59:03,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:03,137 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:03,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:03,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1642154410, now seen corresponding path program 159 times [2021-06-05 07:59:03,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:03,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087715608] [2021-06-05 07:59:03,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:03,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:03,295 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 07:59:03,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:03,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087715608] [2021-06-05 07:59:03,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087715608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:03,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673409023] [2021-06-05 07:59:03,295 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 07:59:03,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 07:59:03,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:03,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:59:03,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:03,486 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 07:59:03,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673409023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:03,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:03,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-05 07:59:03,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707310872] [2021-06-05 07:59:03,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:59:03,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:03,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:59:03,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:59:03,488 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 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 07:59:04,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:04,006 INFO L93 Difference]: Finished difference Result 5021 states and 13297 transitions. [2021-06-05 07:59:04,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 07:59:04,006 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 07:59:04,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:04,011 INFO L225 Difference]: With dead ends: 5021 [2021-06-05 07:59:04,011 INFO L226 Difference]: Without dead ends: 4751 [2021-06-05 07:59:04,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 480.2ms TimeCoverageRelationStatistics Valid=707, Invalid=2155, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:59:04,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4751 states. [2021-06-05 07:59:04,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4751 to 3878. [2021-06-05 07:59:04,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:04,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-05 07:59:04,049 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-05 07:59:04,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:04,049 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-05 07:59:04,049 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 07:59:04,049 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-05 07:59:04,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:59:04,052 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:04,052 INFO L521 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 07:59:04,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 07:59:04,252 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:04,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:04,253 INFO L82 PathProgramCache]: Analyzing trace with hash -643258074, now seen corresponding path program 160 times [2021-06-05 07:59:04,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:04,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665035582] [2021-06-05 07:59:04,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:04,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:04,411 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 07:59:04,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:04,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665035582] [2021-06-05 07:59:04,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665035582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:04,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465323612] [2021-06-05 07:59:04,411 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 07:59:04,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:59:04,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:04,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:59:04,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:04,605 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 07:59:04,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465323612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:04,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:04,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 07:59:04,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118011499] [2021-06-05 07:59:04,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:59:04,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:04,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:59:04,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:59:04,606 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 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 07:59:05,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:05,245 INFO L93 Difference]: Finished difference Result 4971 states and 13197 transitions. [2021-06-05 07:59:05,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 07:59:05,245 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 07:59:05,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:05,250 INFO L225 Difference]: With dead ends: 4971 [2021-06-05 07:59:05,250 INFO L226 Difference]: Without dead ends: 4701 [2021-06-05 07:59:05,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 612.0ms TimeCoverageRelationStatistics Valid=810, Invalid=2496, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 07:59:05,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4701 states. [2021-06-05 07:59:05,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4701 to 3878. [2021-06-05 07:59:05,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:05,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-05 07:59:05,304 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-05 07:59:05,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:05,304 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-05 07:59:05,305 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 07:59:05,305 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-05 07:59:05,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:59:05,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:05,308 INFO L521 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 07:59:05,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 07:59:05,508 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:05,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:05,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1772381332, now seen corresponding path program 161 times [2021-06-05 07:59:05,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:05,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141446681] [2021-06-05 07:59:05,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:05,661 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 07:59:05,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:05,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141446681] [2021-06-05 07:59:05,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141446681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:05,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299162679] [2021-06-05 07:59:05,661 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 07:59:05,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 07:59:05,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:05,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:59:05,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:05,840 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 07:59:05,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299162679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:05,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:05,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-05 07:59:05,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022270112] [2021-06-05 07:59:05,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:59:05,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:05,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:59:05,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:59:05,841 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 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 07:59:06,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:06,386 INFO L93 Difference]: Finished difference Result 4921 states and 13097 transitions. [2021-06-05 07:59:06,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 07:59:06,386 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 07:59:06,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:06,391 INFO L225 Difference]: With dead ends: 4921 [2021-06-05 07:59:06,391 INFO L226 Difference]: Without dead ends: 4651 [2021-06-05 07:59:06,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 502.0ms TimeCoverageRelationStatistics Valid=794, Invalid=2286, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:59:06,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4651 states. [2021-06-05 07:59:06,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4651 to 3878. [2021-06-05 07:59:06,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:06,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-05 07:59:06,425 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-05 07:59:06,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:06,425 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-05 07:59:06,425 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 07:59:06,425 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-05 07:59:06,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:59:06,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:06,428 INFO L521 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 07:59:06,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 07:59:06,629 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:06,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:06,629 INFO L82 PathProgramCache]: Analyzing trace with hash -492266652, now seen corresponding path program 162 times [2021-06-05 07:59:06,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:06,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699392279] [2021-06-05 07:59:06,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:06,793 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 07:59:06,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:06,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699392279] [2021-06-05 07:59:06,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699392279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:06,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378923498] [2021-06-05 07:59:06,794 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 07:59:06,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 07:59:06,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:06,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:59:06,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:06,993 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 07:59:06,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378923498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:06,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:06,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 07:59:06,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575305855] [2021-06-05 07:59:06,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:59:06,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:06,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:59:06,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:59:06,994 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 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 07:59:07,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:07,713 INFO L93 Difference]: Finished difference Result 4871 states and 12997 transitions. [2021-06-05 07:59:07,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 07:59:07,714 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 07:59:07,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:07,718 INFO L225 Difference]: With dead ends: 4871 [2021-06-05 07:59:07,718 INFO L226 Difference]: Without dead ends: 4601 [2021-06-05 07:59:07,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 674.3ms TimeCoverageRelationStatistics Valid=905, Invalid=2635, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 07:59:07,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2021-06-05 07:59:07,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 3878. [2021-06-05 07:59:07,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:07,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-05 07:59:07,756 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-05 07:59:07,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:07,756 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-05 07:59:07,756 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 07:59:07,756 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-05 07:59:07,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:59:07,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:07,759 INFO L521 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 07:59:07,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:07,960 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:07,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:07,960 INFO L82 PathProgramCache]: Analyzing trace with hash 121972818, now seen corresponding path program 163 times [2021-06-05 07:59:07,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:07,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934455204] [2021-06-05 07:59:07,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:07,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:08,109 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 07:59:08,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:08,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934455204] [2021-06-05 07:59:08,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934455204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:08,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867818436] [2021-06-05 07:59:08,110 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 07:59:08,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:08,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:59:08,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:08,283 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 07:59:08,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867818436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:08,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:08,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-05 07:59:08,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312221386] [2021-06-05 07:59:08,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:59:08,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:08,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:59:08,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:59:08,284 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 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 07:59:08,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:08,834 INFO L93 Difference]: Finished difference Result 4821 states and 12897 transitions. [2021-06-05 07:59:08,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 07:59:08,834 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 07:59:08,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:08,839 INFO L225 Difference]: With dead ends: 4821 [2021-06-05 07:59:08,839 INFO L226 Difference]: Without dead ends: 4551 [2021-06-05 07:59:08,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 525.5ms TimeCoverageRelationStatistics Valid=897, Invalid=2409, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 07:59:08,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4551 states. [2021-06-05 07:59:08,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4551 to 3878. [2021-06-05 07:59:08,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:08,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-05 07:59:08,876 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-05 07:59:08,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:08,876 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-05 07:59:08,876 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 07:59:08,876 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-05 07:59:08,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:59:08,879 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:08,879 INFO L521 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 07:59:09,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-05 07:59:09,087 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:09,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:09,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1593269470, now seen corresponding path program 164 times [2021-06-05 07:59:09,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:09,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067842972] [2021-06-05 07:59:09,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:09,258 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 07:59:09,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:09,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067842972] [2021-06-05 07:59:09,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067842972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:09,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684031860] [2021-06-05 07:59:09,258 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 07:59:09,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:59:09,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:09,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:59:09,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:09,469 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 07:59:09,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684031860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:09,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:09,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 07:59:09,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461713196] [2021-06-05 07:59:09,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:59:09,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:09,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:59:09,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:59:09,470 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 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 07:59:10,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:10,314 INFO L93 Difference]: Finished difference Result 5279 states and 14163 transitions. [2021-06-05 07:59:10,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 07:59:10,315 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 07:59:10,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:10,319 INFO L225 Difference]: With dead ends: 5279 [2021-06-05 07:59:10,319 INFO L226 Difference]: Without dead ends: 4656 [2021-06-05 07:59:10,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 783.4ms TimeCoverageRelationStatistics Valid=1037, Invalid=2995, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 07:59:10,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4656 states. [2021-06-05 07:59:10,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4656 to 3788. [2021-06-05 07:59:10,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 3787 states have (on average 2.81172432004225) internal successors, (10648), 3787 states have internal predecessors, (10648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:10,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 10648 transitions. [2021-06-05 07:59:10,362 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 10648 transitions. Word has length 120 [2021-06-05 07:59:10,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:10,362 INFO L482 AbstractCegarLoop]: Abstraction has 3788 states and 10648 transitions. [2021-06-05 07:59:10,362 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 07:59:10,362 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 10648 transitions. [2021-06-05 07:59:10,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:59:10,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:10,365 INFO L521 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 07:59:10,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:10,565 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:10,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:10,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1669050224, now seen corresponding path program 165 times [2021-06-05 07:59:10,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:10,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542102229] [2021-06-05 07:59:10,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:10,712 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 07:59:10,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:10,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542102229] [2021-06-05 07:59:10,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542102229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:10,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836541162] [2021-06-05 07:59:10,713 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 07:59:10,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 07:59:10,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:10,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:59:10,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:10,895 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 07:59:10,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836541162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:10,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:10,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-05 07:59:10,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519228140] [2021-06-05 07:59:10,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:59:10,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:10,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:59:10,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:59:10,896 INFO L87 Difference]: Start difference. First operand 3788 states and 10648 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 07:59:11,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:11,483 INFO L93 Difference]: Finished difference Result 5508 states and 14881 transitions. [2021-06-05 07:59:11,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 07:59:11,483 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 07:59:11,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:11,488 INFO L225 Difference]: With dead ends: 5508 [2021-06-05 07:59:11,488 INFO L226 Difference]: Without dead ends: 5238 [2021-06-05 07:59:11,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 553.0ms TimeCoverageRelationStatistics Valid=1017, Invalid=2523, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 07:59:11,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5238 states. [2021-06-05 07:59:11,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5238 to 3968. [2021-06-05 07:59:11,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3968 states, 3967 states have (on average 2.825056717922864) internal successors, (11207), 3967 states have internal predecessors, (11207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:11,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3968 states to 3968 states and 11207 transitions. [2021-06-05 07:59:11,526 INFO L78 Accepts]: Start accepts. Automaton has 3968 states and 11207 transitions. Word has length 120 [2021-06-05 07:59:11,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:11,526 INFO L482 AbstractCegarLoop]: Abstraction has 3968 states and 11207 transitions. [2021-06-05 07:59:11,526 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 07:59:11,526 INFO L276 IsEmpty]: Start isEmpty. Operand 3968 states and 11207 transitions. [2021-06-05 07:59:11,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:59:11,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:11,529 INFO L521 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 07:59:11,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:11,729 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:11,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:11,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1691393474, now seen corresponding path program 166 times [2021-06-05 07:59:11,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:11,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769390896] [2021-06-05 07:59:11,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:11,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:11,878 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 07:59:11,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:11,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769390896] [2021-06-05 07:59:11,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769390896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:11,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996969486] [2021-06-05 07:59:11,878 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 07:59:11,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:59:11,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:11,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:59:11,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:12,077 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 07:59:12,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996969486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:12,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:12,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-05 07:59:12,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180781066] [2021-06-05 07:59:12,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:59:12,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:12,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:59:12,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:59:12,078 INFO L87 Difference]: Start difference. First operand 3968 states and 11207 transitions. Second operand has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:12,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:12,897 INFO L93 Difference]: Finished difference Result 5451 states and 14741 transitions. [2021-06-05 07:59:12,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 07:59:12,897 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have 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 07:59:12,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:12,902 INFO L225 Difference]: With dead ends: 5451 [2021-06-05 07:59:12,902 INFO L226 Difference]: Without dead ends: 4876 [2021-06-05 07:59:12,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 772.6ms TimeCoverageRelationStatistics Valid=1212, Invalid=3344, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 07:59:12,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4876 states. [2021-06-05 07:59:12,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4876 to 4003. [2021-06-05 07:59:12,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:12,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-05 07:59:12,941 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 120 [2021-06-05 07:59:12,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:12,941 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-05 07:59:12,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:12,941 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-05 07:59:12,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 07:59:12,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:12,944 INFO L521 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 07:59:13,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:13,144 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:13,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:13,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1352458403, now seen corresponding path program 167 times [2021-06-05 07:59:13,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:13,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027157791] [2021-06-05 07:59:13,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:13,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:13,343 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 07:59:13,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:13,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027157791] [2021-06-05 07:59:13,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027157791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:13,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847421223] [2021-06-05 07:59:13,343 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 07:59:13,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 07:59:13,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:13,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:59:13,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:13,541 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 07:59:13,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847421223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:13,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:13,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 07:59:13,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342104109] [2021-06-05 07:59:13,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:59:13,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:13,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:59:13,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:59:13,542 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 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 07:59:13,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:13,930 INFO L93 Difference]: Finished difference Result 5246 states and 13897 transitions. [2021-06-05 07:59:13,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:59:13,931 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 07:59:13,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:13,936 INFO L225 Difference]: With dead ends: 5246 [2021-06-05 07:59:13,936 INFO L226 Difference]: Without dead ends: 4976 [2021-06-05 07:59:13,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 421.6ms TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:59:13,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4976 states. [2021-06-05 07:59:13,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4976 to 4003. [2021-06-05 07:59:13,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:13,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-05 07:59:13,978 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-05 07:59:13,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:13,978 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-05 07:59:13,978 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 07:59:13,978 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-05 07:59:13,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 07:59:13,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:13,981 INFO L521 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 07:59:14,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-06-05 07:59:14,181 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:14,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:14,182 INFO L82 PathProgramCache]: Analyzing trace with hash 2043985453, now seen corresponding path program 168 times [2021-06-05 07:59:14,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:14,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614672869] [2021-06-05 07:59:14,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:14,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:14,386 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 07:59:14,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:14,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614672869] [2021-06-05 07:59:14,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614672869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:14,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331961856] [2021-06-05 07:59:14,387 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 07:59:14,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 07:59:14,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:14,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:59:14,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:14,603 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 07:59:14,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331961856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:14,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:14,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 07:59:14,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490084701] [2021-06-05 07:59:14,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:59:14,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:14,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:59:14,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:59:14,604 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 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 07:59:15,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:15,046 INFO L93 Difference]: Finished difference Result 5641 states and 14687 transitions. [2021-06-05 07:59:15,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:59:15,047 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 07:59:15,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:15,052 INFO L225 Difference]: With dead ends: 5641 [2021-06-05 07:59:15,052 INFO L226 Difference]: Without dead ends: 5371 [2021-06-05 07:59:15,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 475.3ms TimeCoverageRelationStatistics Valid=631, Invalid=1919, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:59:15,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5371 states. [2021-06-05 07:59:15,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5371 to 4003. [2021-06-05 07:59:15,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:15,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-05 07:59:15,092 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-05 07:59:15,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:15,092 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-05 07:59:15,092 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 07:59:15,092 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-05 07:59:15,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 07:59:15,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:15,095 INFO L521 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 07:59:15,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:15,296 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:15,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:15,296 INFO L82 PathProgramCache]: Analyzing trace with hash 429031963, now seen corresponding path program 169 times [2021-06-05 07:59:15,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:15,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433876988] [2021-06-05 07:59:15,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:15,480 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 07:59:15,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:15,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433876988] [2021-06-05 07:59:15,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433876988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:15,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716422183] [2021-06-05 07:59:15,481 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 07:59:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:15,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:59:15,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:15,672 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 07:59:15,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716422183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:15,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:15,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 07:59:15,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806987623] [2021-06-05 07:59:15,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:59:15,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:15,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:59:15,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:59:15,674 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 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 07:59:16,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:16,077 INFO L93 Difference]: Finished difference Result 5596 states and 14597 transitions. [2021-06-05 07:59:16,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:59:16,077 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 07:59:16,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:16,083 INFO L225 Difference]: With dead ends: 5596 [2021-06-05 07:59:16,083 INFO L226 Difference]: Without dead ends: 5326 [2021-06-05 07:59:16,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 440.1ms TimeCoverageRelationStatistics Valid=631, Invalid=1919, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:59:16,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2021-06-05 07:59:16,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 4003. [2021-06-05 07:59:16,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:16,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-05 07:59:16,128 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-05 07:59:16,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:16,128 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-05 07:59:16,128 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 07:59:16,128 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-05 07:59:16,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 07:59:16,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:16,131 INFO L521 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 07:59:16,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 07:59:16,331 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:16,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:16,332 INFO L82 PathProgramCache]: Analyzing trace with hash 48588011, now seen corresponding path program 170 times [2021-06-05 07:59:16,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:16,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198325546] [2021-06-05 07:59:16,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:16,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:16,525 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 07:59:16,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:16,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198325546] [2021-06-05 07:59:16,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198325546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:16,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570206087] [2021-06-05 07:59:16,525 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 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 07:59:16,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:59:16,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:16,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:59:16,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:16,731 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 07:59:16,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570206087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:16,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:16,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 07:59:16,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222549288] [2021-06-05 07:59:16,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:59:16,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:16,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:59:16,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:59:16,732 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 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 07:59:17,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:17,211 INFO L93 Difference]: Finished difference Result 5546 states and 14497 transitions. [2021-06-05 07:59:17,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:59:17,211 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 07:59:17,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:17,216 INFO L225 Difference]: With dead ends: 5546 [2021-06-05 07:59:17,216 INFO L226 Difference]: Without dead ends: 5276 [2021-06-05 07:59:17,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 525.2ms TimeCoverageRelationStatistics Valid=653, Invalid=2103, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:59:17,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5276 states. [2021-06-05 07:59:17,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5276 to 4003. [2021-06-05 07:59:17,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:17,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-05 07:59:17,255 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-05 07:59:17,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:17,256 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-05 07:59:17,256 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 07:59:17,256 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-05 07:59:17,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 07:59:17,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:17,259 INFO L521 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 07:59:17,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 07:59:17,460 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:17,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:17,460 INFO L82 PathProgramCache]: Analyzing trace with hash 672963161, now seen corresponding path program 171 times [2021-06-05 07:59:17,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:17,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770287633] [2021-06-05 07:59:17,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:17,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:17,650 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 07:59:17,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:17,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770287633] [2021-06-05 07:59:17,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770287633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:17,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582365075] [2021-06-05 07:59:17,651 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 07:59:17,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 07:59:17,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:17,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:59:17,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:17,849 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 07:59:17,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582365075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:17,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:17,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 07:59:17,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730066811] [2021-06-05 07:59:17,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:59:17,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:17,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:59:17,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:59:17,850 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 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 07:59:18,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:18,291 INFO L93 Difference]: Finished difference Result 5496 states and 14397 transitions. [2021-06-05 07:59:18,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:59:18,292 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 07:59:18,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:18,297 INFO L225 Difference]: With dead ends: 5496 [2021-06-05 07:59:18,297 INFO L226 Difference]: Without dead ends: 5226 [2021-06-05 07:59:18,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 465.0ms TimeCoverageRelationStatistics Valid=667, Invalid=2089, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:59:18,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2021-06-05 07:59:18,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 4003. [2021-06-05 07:59:18,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:18,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-05 07:59:18,334 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-05 07:59:18,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:18,334 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-05 07:59:18,334 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 07:59:18,334 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-05 07:59:18,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 07:59:18,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:18,337 INFO L521 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 07:59:18,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 07:59:18,538 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:18,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:18,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1482015017, now seen corresponding path program 172 times [2021-06-05 07:59:18,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:18,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288880934] [2021-06-05 07:59:18,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:18,772 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 07:59:18,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:18,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288880934] [2021-06-05 07:59:18,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288880934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:18,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537198208] [2021-06-05 07:59:18,773 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 07:59:18,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:59:18,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:18,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:59:18,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:19,008 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 07:59:19,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537198208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:19,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:19,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 07:59:19,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724823470] [2021-06-05 07:59:19,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:59:19,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:19,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:59:19,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:59:19,010 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 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 07:59:19,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:19,553 INFO L93 Difference]: Finished difference Result 5446 states and 14297 transitions. [2021-06-05 07:59:19,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 07:59:19,553 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 07:59:19,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:19,558 INFO L225 Difference]: With dead ends: 5446 [2021-06-05 07:59:19,558 INFO L226 Difference]: Without dead ends: 5176 [2021-06-05 07:59:19,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 606.2ms TimeCoverageRelationStatistics Valid=691, Invalid=2279, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 07:59:19,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-06-05 07:59:19,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 4003. [2021-06-05 07:59:19,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:19,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-05 07:59:19,613 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-05 07:59:19,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:19,613 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-05 07:59:19,613 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 07:59:19,613 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-05 07:59:19,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 07:59:19,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:19,617 INFO L521 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 07:59:19,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-06-05 07:59:19,823 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:19,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:19,824 INFO L82 PathProgramCache]: Analyzing trace with hash 90064919, now seen corresponding path program 173 times [2021-06-05 07:59:19,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:19,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525873338] [2021-06-05 07:59:19,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:19,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:20,039 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 07:59:20,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:20,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525873338] [2021-06-05 07:59:20,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525873338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:20,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077773468] [2021-06-05 07:59:20,040 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 07:59:20,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 07:59:20,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:20,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:59:20,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:20,245 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 07:59:20,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077773468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:20,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:20,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 07:59:20,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298477132] [2021-06-05 07:59:20,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:59:20,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:20,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:59:20,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:59:20,246 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 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 07:59:20,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:20,721 INFO L93 Difference]: Finished difference Result 5396 states and 14197 transitions. [2021-06-05 07:59:20,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 07:59:20,721 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 07:59:20,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:20,727 INFO L225 Difference]: With dead ends: 5396 [2021-06-05 07:59:20,727 INFO L226 Difference]: Without dead ends: 5126 [2021-06-05 07:59:20,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 517.3ms TimeCoverageRelationStatistics Valid=719, Invalid=2251, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 07:59:20,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5126 states. [2021-06-05 07:59:20,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5126 to 4003. [2021-06-05 07:59:20,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:20,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-05 07:59:20,769 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-05 07:59:20,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:20,769 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-05 07:59:20,769 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 07:59:20,769 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-05 07:59:20,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 07:59:20,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:20,772 INFO L521 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 07:59:20,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:20,973 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:20,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:20,973 INFO L82 PathProgramCache]: Analyzing trace with hash -155012377, now seen corresponding path program 174 times [2021-06-05 07:59:20,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:20,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536645913] [2021-06-05 07:59:20,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:20,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:21,163 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 07:59:21,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:21,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536645913] [2021-06-05 07:59:21,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536645913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:21,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520328867] [2021-06-05 07:59:21,164 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 07:59:21,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 07:59:21,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:21,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:59:21,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:21,378 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 07:59:21,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520328867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:21,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:21,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 07:59:21,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685290667] [2021-06-05 07:59:21,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:59:21,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:21,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:59:21,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:59:21,379 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 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 07:59:21,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:21,966 INFO L93 Difference]: Finished difference Result 5346 states and 14097 transitions. [2021-06-05 07:59:21,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:59:21,967 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 07:59:21,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:21,971 INFO L225 Difference]: With dead ends: 5346 [2021-06-05 07:59:21,971 INFO L226 Difference]: Without dead ends: 5076 [2021-06-05 07:59:21,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 592.4ms TimeCoverageRelationStatistics Valid=745, Invalid=2447, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:59:21,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5076 states. [2021-06-05 07:59:22,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5076 to 4003. [2021-06-05 07:59:22,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:22,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-05 07:59:22,009 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-05 07:59:22,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:22,009 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-05 07:59:22,009 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 07:59:22,009 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-05 07:59:22,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 07:59:22,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:22,012 INFO L521 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 07:59:22,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 07:59:22,212 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:22,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:22,213 INFO L82 PathProgramCache]: Analyzing trace with hash -531862699, now seen corresponding path program 175 times [2021-06-05 07:59:22,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:22,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865022418] [2021-06-05 07:59:22,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:22,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:22,380 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 07:59:22,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:22,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865022418] [2021-06-05 07:59:22,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865022418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:22,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577227312] [2021-06-05 07:59:22,380 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 07:59:22,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:22,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:59:22,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:22,568 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 07:59:22,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577227312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:22,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:22,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 07:59:22,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817679100] [2021-06-05 07:59:22,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:59:22,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:22,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:59:22,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:59:22,569 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 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 07:59:23,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:23,086 INFO L93 Difference]: Finished difference Result 5296 states and 13997 transitions. [2021-06-05 07:59:23,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 07:59:23,086 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 07:59:23,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:23,092 INFO L225 Difference]: With dead ends: 5296 [2021-06-05 07:59:23,092 INFO L226 Difference]: Without dead ends: 5026 [2021-06-05 07:59:23,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 503.6ms TimeCoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:59:23,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5026 states. [2021-06-05 07:59:23,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5026 to 4003. [2021-06-05 07:59:23,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:23,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-05 07:59:23,138 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-05 07:59:23,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:23,138 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-05 07:59:23,138 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 07:59:23,138 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-05 07:59:23,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 07:59:23,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:23,141 INFO L521 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 07:59:23,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:23,342 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:23,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:23,342 INFO L82 PathProgramCache]: Analyzing trace with hash 794892837, now seen corresponding path program 176 times [2021-06-05 07:59:23,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:23,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760354015] [2021-06-05 07:59:23,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:23,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:23,523 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 07:59:23,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:23,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760354015] [2021-06-05 07:59:23,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760354015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:23,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161291648] [2021-06-05 07:59:23,523 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 07:59:23,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:59:23,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:23,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:59:23,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:23,724 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 07:59:23,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161291648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:23,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:23,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 07:59:23,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243263155] [2021-06-05 07:59:23,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:59:23,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:23,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:59:23,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:59:23,725 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 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 07:59:24,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:24,353 INFO L93 Difference]: Finished difference Result 5246 states and 13897 transitions. [2021-06-05 07:59:24,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 07:59:24,353 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 07:59:24,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:24,357 INFO L225 Difference]: With dead ends: 5246 [2021-06-05 07:59:24,357 INFO L226 Difference]: Without dead ends: 4976 [2021-06-05 07:59:24,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 618.6ms TimeCoverageRelationStatistics Valid=815, Invalid=2607, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 07:59:24,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4976 states. [2021-06-05 07:59:24,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4976 to 4003. [2021-06-05 07:59:24,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:24,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-05 07:59:24,397 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-05 07:59:24,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:24,397 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-05 07:59:24,397 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 07:59:24,397 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-05 07:59:24,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 07:59:24,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:24,401 INFO L521 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 07:59:24,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:24,602 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:24,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:24,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1249109011, now seen corresponding path program 177 times [2021-06-05 07:59:24,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:24,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279120250] [2021-06-05 07:59:24,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:24,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:24,767 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 07:59:24,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:24,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279120250] [2021-06-05 07:59:24,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279120250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:24,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100713417] [2021-06-05 07:59:24,768 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 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 07:59:24,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 07:59:24,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:24,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:59:24,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:24,977 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 07:59:24,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100713417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:24,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:24,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 07:59:24,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595495186] [2021-06-05 07:59:24,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:59:24,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:24,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:59:24,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:59:24,978 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 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 07:59:25,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:25,522 INFO L93 Difference]: Finished difference Result 5196 states and 13797 transitions. [2021-06-05 07:59:25,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 07:59:25,523 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 07:59:25,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:25,528 INFO L225 Difference]: With dead ends: 5196 [2021-06-05 07:59:25,528 INFO L226 Difference]: Without dead ends: 4926 [2021-06-05 07:59:25,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 526.3ms TimeCoverageRelationStatistics Valid=871, Invalid=2551, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 07:59:25,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4926 states. [2021-06-05 07:59:25,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4926 to 4003. [2021-06-05 07:59:25,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:25,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-05 07:59:25,568 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-05 07:59:25,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:25,568 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-05 07:59:25,568 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 07:59:25,568 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-05 07:59:25,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 07:59:25,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:25,571 INFO L521 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 07:59:25,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:25,772 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:25,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:25,772 INFO L82 PathProgramCache]: Analyzing trace with hash -2046961949, now seen corresponding path program 178 times [2021-06-05 07:59:25,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:25,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776020072] [2021-06-05 07:59:25,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:25,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:25,937 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 07:59:25,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:25,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776020072] [2021-06-05 07:59:25,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776020072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:25,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112831958] [2021-06-05 07:59:25,937 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 07:59:25,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:59:25,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:25,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:59:25,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:26,155 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 07:59:26,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112831958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:26,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:26,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 07:59:26,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127377199] [2021-06-05 07:59:26,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:59:26,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:26,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:59:26,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:59:26,157 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 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 07:59:26,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:26,904 INFO L93 Difference]: Finished difference Result 5146 states and 13697 transitions. [2021-06-05 07:59:26,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 07:59:26,904 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 07:59:26,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:26,909 INFO L225 Difference]: With dead ends: 5146 [2021-06-05 07:59:26,909 INFO L226 Difference]: Without dead ends: 4876 [2021-06-05 07:59:26,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 699.5ms TimeCoverageRelationStatistics Valid=901, Invalid=2759, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 07:59:26,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4876 states. [2021-06-05 07:59:26,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4876 to 4003. [2021-06-05 07:59:26,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:26,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-05 07:59:26,946 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-05 07:59:26,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:26,947 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-05 07:59:26,947 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 07:59:26,947 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-05 07:59:26,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 07:59:26,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:26,950 INFO L521 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 07:59:27,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:27,150 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:27,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:27,151 INFO L82 PathProgramCache]: Analyzing trace with hash 368677457, now seen corresponding path program 179 times [2021-06-05 07:59:27,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:27,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513836608] [2021-06-05 07:59:27,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:27,312 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 07:59:27,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:27,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513836608] [2021-06-05 07:59:27,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513836608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:27,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393985868] [2021-06-05 07:59:27,313 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 07:59:27,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 07:59:27,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:27,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:59:27,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:27,500 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 07:59:27,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393985868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:27,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:27,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 07:59:27,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818583557] [2021-06-05 07:59:27,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:59:27,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:27,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:59:27,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:59:27,502 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 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 07:59:28,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:28,088 INFO L93 Difference]: Finished difference Result 5096 states and 13597 transitions. [2021-06-05 07:59:28,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 07:59:28,088 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 07:59:28,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:28,093 INFO L225 Difference]: With dead ends: 5096 [2021-06-05 07:59:28,093 INFO L226 Difference]: Without dead ends: 4826 [2021-06-05 07:59:28,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 544.8ms TimeCoverageRelationStatistics Valid=971, Invalid=2689, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 07:59:28,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2021-06-05 07:59:28,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 4003. [2021-06-05 07:59:28,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:28,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-05 07:59:28,130 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-05 07:59:28,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:28,130 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-05 07:59:28,131 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 07:59:28,131 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-05 07:59:28,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 07:59:28,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:28,134 INFO L521 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 07:59:28,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable187 [2021-06-05 07:59:28,334 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:28,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:28,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1895970527, now seen corresponding path program 180 times [2021-06-05 07:59:28,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:28,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136328026] [2021-06-05 07:59:28,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:28,498 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 07:59:28,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:28,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136328026] [2021-06-05 07:59:28,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136328026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:28,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068079349] [2021-06-05 07:59:28,499 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 07:59:28,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 07:59:28,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:28,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:59:28,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:28,703 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 07:59:28,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068079349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:28,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:28,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 07:59:28,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984069094] [2021-06-05 07:59:28,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:59:28,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:28,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:59:28,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:59:28,704 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 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 07:59:29,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:29,428 INFO L93 Difference]: Finished difference Result 5046 states and 13497 transitions. [2021-06-05 07:59:29,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 07:59:29,428 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 07:59:29,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:29,433 INFO L225 Difference]: With dead ends: 5046 [2021-06-05 07:59:29,433 INFO L226 Difference]: Without dead ends: 4776 [2021-06-05 07:59:29,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 688.3ms TimeCoverageRelationStatistics Valid=1003, Invalid=2903, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 07:59:29,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4776 states. [2021-06-05 07:59:29,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4776 to 4003. [2021-06-05 07:59:29,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:29,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-05 07:59:29,475 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-05 07:59:29,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:29,475 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-05 07:59:29,475 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 07:59:29,475 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-05 07:59:29,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 07:59:29,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:29,479 INFO L521 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 07:59:29,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-06-05 07:59:29,680 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:29,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:29,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1281731057, now seen corresponding path program 181 times [2021-06-05 07:59:29,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:29,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277113696] [2021-06-05 07:59:29,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:29,840 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 07:59:29,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:29,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277113696] [2021-06-05 07:59:29,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277113696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:29,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423861928] [2021-06-05 07:59:29,841 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 07:59:29,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:29,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:59:29,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:30,022 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 07:59:30,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423861928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:30,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:30,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 07:59:30,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305112381] [2021-06-05 07:59:30,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:59:30,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:30,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:59:30,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:59:30,023 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 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 07:59:30,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:30,623 INFO L93 Difference]: Finished difference Result 4996 states and 13397 transitions. [2021-06-05 07:59:30,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:59:30,623 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 07:59:30,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:30,628 INFO L225 Difference]: With dead ends: 4996 [2021-06-05 07:59:30,628 INFO L226 Difference]: Without dead ends: 4726 [2021-06-05 07:59:30,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 568.1ms TimeCoverageRelationStatistics Valid=1087, Invalid=2819, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 07:59:30,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4726 states. [2021-06-05 07:59:30,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4726 to 4003. [2021-06-05 07:59:30,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:30,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-05 07:59:30,665 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-05 07:59:30,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:30,665 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-05 07:59:30,665 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 07:59:30,665 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-05 07:59:30,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 07:59:30,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:30,668 INFO L521 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 07:59:30,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 07:59:30,868 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:30,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:30,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1297993951, now seen corresponding path program 182 times [2021-06-05 07:59:30,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:30,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005124211] [2021-06-05 07:59:30,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:30,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:31,043 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 07:59:31,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:31,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005124211] [2021-06-05 07:59:31,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005124211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:31,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285923907] [2021-06-05 07:59:31,043 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 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 07:59:31,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:59:31,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:31,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:59:31,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:31,260 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 07:59:31,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285923907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:31,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:31,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 07:59:31,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443170373] [2021-06-05 07:59:31,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:59:31,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:31,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:59:31,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:59:31,261 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 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 07:59:32,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:32,013 INFO L93 Difference]: Finished difference Result 5006 states and 13447 transitions. [2021-06-05 07:59:32,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 07:59:32,013 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 07:59:32,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:32,018 INFO L225 Difference]: With dead ends: 5006 [2021-06-05 07:59:32,018 INFO L226 Difference]: Without dead ends: 4736 [2021-06-05 07:59:32,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 720.5ms TimeCoverageRelationStatistics Valid=1121, Invalid=3039, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 07:59:32,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4736 states. [2021-06-05 07:59:32,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4736 to 4003. [2021-06-05 07:59:32,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8205897051474262) internal successors, (11288), 4002 states have internal predecessors, (11288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:32,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11288 transitions. [2021-06-05 07:59:32,058 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11288 transitions. Word has length 125 [2021-06-05 07:59:32,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:32,058 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11288 transitions. [2021-06-05 07:59:32,059 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 07:59:32,059 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11288 transitions. [2021-06-05 07:59:32,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 07:59:32,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:32,061 INFO L521 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 07:59:32,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:32,263 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:32,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:32,263 INFO L82 PathProgramCache]: Analyzing trace with hash 265346349, now seen corresponding path program 183 times [2021-06-05 07:59:32,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:32,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315756577] [2021-06-05 07:59:32,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:32,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:32,423 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 07:59:32,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:32,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315756577] [2021-06-05 07:59:32,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315756577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:32,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202908094] [2021-06-05 07:59:32,423 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 07:59:32,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 07:59:32,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:32,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:59:32,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:32,613 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 07:59:32,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202908094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:32,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:32,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 07:59:32,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733279363] [2021-06-05 07:59:32,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:59:32,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:32,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:59:32,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:59:32,614 INFO L87 Difference]: Start difference. First operand 4003 states and 11288 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 07:59:33,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:33,248 INFO L93 Difference]: Finished difference Result 5748 states and 15571 transitions. [2021-06-05 07:59:33,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 07:59:33,248 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 07:59:33,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:33,254 INFO L225 Difference]: With dead ends: 5748 [2021-06-05 07:59:33,254 INFO L226 Difference]: Without dead ends: 5478 [2021-06-05 07:59:33,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 595.1ms TimeCoverageRelationStatistics Valid=1220, Invalid=2940, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 07:59:33,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5478 states. [2021-06-05 07:59:33,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5478 to 4183. [2021-06-05 07:59:33,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4183 states, 4182 states have (on average 2.832855093256815) internal successors, (11847), 4182 states have internal predecessors, (11847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:33,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4183 states to 4183 states and 11847 transitions. [2021-06-05 07:59:33,298 INFO L78 Accepts]: Start accepts. Automaton has 4183 states and 11847 transitions. Word has length 125 [2021-06-05 07:59:33,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:33,298 INFO L482 AbstractCegarLoop]: Abstraction has 4183 states and 11847 transitions. [2021-06-05 07:59:33,298 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 07:59:33,298 INFO L276 IsEmpty]: Start isEmpty. Operand 4183 states and 11847 transitions. [2021-06-05 07:59:33,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 07:59:33,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:33,301 INFO L521 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 07:59:33,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:33,505 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:33,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:33,505 INFO L82 PathProgramCache]: Analyzing trace with hash 287689599, now seen corresponding path program 184 times [2021-06-05 07:59:33,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:33,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892414870] [2021-06-05 07:59:33,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:33,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:33,705 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 07:59:33,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:33,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892414870] [2021-06-05 07:59:33,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892414870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:33,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259526102] [2021-06-05 07:59:33,706 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 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 07:59:33,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:59:33,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:33,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:59:33,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:33,900 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 07:59:33,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259526102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:33,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:33,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 07:59:33,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484379480] [2021-06-05 07:59:33,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:59:33,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:33,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:59:33,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:59:33,901 INFO L87 Difference]: Start difference. First operand 4183 states and 11847 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 07:59:34,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:34,680 INFO L93 Difference]: Finished difference Result 5210 states and 14221 transitions. [2021-06-05 07:59:34,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 07:59:34,680 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 07:59:34,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:34,685 INFO L225 Difference]: With dead ends: 5210 [2021-06-05 07:59:34,685 INFO L226 Difference]: Without dead ends: 4721 [2021-06-05 07:59:34,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 777.9ms TimeCoverageRelationStatistics Valid=1258, Invalid=3164, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 07:59:34,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4721 states. [2021-06-05 07:59:34,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4721 to 4128. [2021-06-05 07:59:34,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4128 states, 4127 states have (on average 2.8308698812696873) internal successors, (11683), 4127 states have internal predecessors, (11683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:34,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4128 states to 4128 states and 11683 transitions. [2021-06-05 07:59:34,724 INFO L78 Accepts]: Start accepts. Automaton has 4128 states and 11683 transitions. Word has length 125 [2021-06-05 07:59:34,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:34,724 INFO L482 AbstractCegarLoop]: Abstraction has 4128 states and 11683 transitions. [2021-06-05 07:59:34,724 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 07:59:34,724 INFO L276 IsEmpty]: Start isEmpty. Operand 4128 states and 11683 transitions. [2021-06-05 07:59:34,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 07:59:34,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:34,727 INFO L521 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 07:59:34,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:34,928 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:34,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:34,928 INFO L82 PathProgramCache]: Analyzing trace with hash -325106707, now seen corresponding path program 185 times [2021-06-05 07:59:34,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:34,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002495101] [2021-06-05 07:59:34,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:35,208 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 07:59:35,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:35,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002495101] [2021-06-05 07:59:35,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002495101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:35,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003051289] [2021-06-05 07:59:35,209 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 07:59:35,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 07:59:35,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:35,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:59:35,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:35,481 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 07:59:35,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003051289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:35,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:35,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-05 07:59:35,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913932350] [2021-06-05 07:59:35,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 07:59:35,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:35,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 07:59:35,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:59:35,482 INFO L87 Difference]: Start difference. First operand 4128 states and 11683 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 07:59:35,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:35,898 INFO L93 Difference]: Finished difference Result 4948 states and 13451 transitions. [2021-06-05 07:59:35,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:59:35,898 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 07:59:35,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:35,903 INFO L225 Difference]: With dead ends: 4948 [2021-06-05 07:59:35,904 INFO L226 Difference]: Without dead ends: 4678 [2021-06-05 07:59:35,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 543.6ms TimeCoverageRelationStatistics Valid=725, Invalid=1927, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:59:35,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4678 states. [2021-06-05 07:59:35,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4678 to 4213. [2021-06-05 07:59:35,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4213 states, 4212 states have (on average 2.8141025641025643) internal successors, (11853), 4212 states have internal predecessors, (11853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:35,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4213 states to 4213 states and 11853 transitions. [2021-06-05 07:59:35,961 INFO L78 Accepts]: Start accepts. Automaton has 4213 states and 11853 transitions. Word has length 130 [2021-06-05 07:59:35,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:35,962 INFO L482 AbstractCegarLoop]: Abstraction has 4213 states and 11853 transitions. [2021-06-05 07:59:35,962 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 07:59:35,962 INFO L276 IsEmpty]: Start isEmpty. Operand 4213 states and 11853 transitions. [2021-06-05 07:59:35,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 07:59:35,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:35,965 INFO L521 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 07:59:36,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:36,166 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:36,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:36,166 INFO L82 PathProgramCache]: Analyzing trace with hash -2008975183, now seen corresponding path program 186 times [2021-06-05 07:59:36,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:36,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994934527] [2021-06-05 07:59:36,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:36,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:36,382 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 07:59:36,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:36,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994934527] [2021-06-05 07:59:36,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994934527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:36,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89438352] [2021-06-05 07:59:36,383 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 07:59:36,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 07:59:36,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:36,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:59:36,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:36,616 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 07:59:36,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89438352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:36,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:36,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 07:59:36,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255690049] [2021-06-05 07:59:36,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:59:36,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:36,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:59:36,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:59:36,618 INFO L87 Difference]: Start difference. First operand 4213 states and 11853 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 07:59:36,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:36,988 INFO L93 Difference]: Finished difference Result 6061 states and 15677 transitions. [2021-06-05 07:59:36,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:59:36,988 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 07:59:36,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:36,994 INFO L225 Difference]: With dead ends: 6061 [2021-06-05 07:59:36,994 INFO L226 Difference]: Without dead ends: 5791 [2021-06-05 07:59:36,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 437.6ms TimeCoverageRelationStatistics Valid=616, Invalid=1640, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:59:36,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5791 states. [2021-06-05 07:59:37,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5791 to 4228. [2021-06-05 07:59:37,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:37,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 07:59:37,040 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 07:59:37,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:37,040 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 07:59:37,040 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 07:59:37,040 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 07:59:37,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 07:59:37,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:37,043 INFO L521 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 07:59:37,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-05 07:59:37,244 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:37,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:37,244 INFO L82 PathProgramCache]: Analyzing trace with hash -644426879, now seen corresponding path program 187 times [2021-06-05 07:59:37,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:37,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117215181] [2021-06-05 07:59:37,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:37,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:37,471 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 07:59:37,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:37,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117215181] [2021-06-05 07:59:37,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117215181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:37,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214316287] [2021-06-05 07:59:37,472 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 07:59:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:37,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:59:37,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:37,694 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 07:59:37,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214316287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:37,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:37,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 07:59:37,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241747312] [2021-06-05 07:59:37,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:59:37,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:37,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:59:37,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:59:37,695 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 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 07:59:38,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:38,124 INFO L93 Difference]: Finished difference Result 5946 states and 15447 transitions. [2021-06-05 07:59:38,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:59:38,124 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 07:59:38,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:38,130 INFO L225 Difference]: With dead ends: 5946 [2021-06-05 07:59:38,130 INFO L226 Difference]: Without dead ends: 5676 [2021-06-05 07:59:38,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 507.9ms TimeCoverageRelationStatistics Valid=683, Invalid=1969, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:59:38,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5676 states. [2021-06-05 07:59:38,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5676 to 4228. [2021-06-05 07:59:38,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:38,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 07:59:38,196 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 07:59:38,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:38,196 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 07:59:38,196 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 07:59:38,196 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 07:59:38,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 07:59:38,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:38,199 INFO L521 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 07:59:38,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:38,400 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:38,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:38,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1373308399, now seen corresponding path program 188 times [2021-06-05 07:59:38,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:38,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619264872] [2021-06-05 07:59:38,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:38,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:38,611 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 07:59:38,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:38,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619264872] [2021-06-05 07:59:38,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619264872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:38,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090724528] [2021-06-05 07:59:38,612 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 07:59:38,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:59:38,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:38,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:59:38,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:38,815 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 07:59:38,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090724528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:38,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:38,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 07:59:38,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794387938] [2021-06-05 07:59:38,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:59:38,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:38,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:59:38,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:59:38,816 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 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 07:59:39,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:39,216 INFO L93 Difference]: Finished difference Result 5921 states and 15397 transitions. [2021-06-05 07:59:39,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:59:39,217 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 07:59:39,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:39,222 INFO L225 Difference]: With dead ends: 5921 [2021-06-05 07:59:39,222 INFO L226 Difference]: Without dead ends: 5651 [2021-06-05 07:59:39,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 453.4ms TimeCoverageRelationStatistics Valid=621, Invalid=1829, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:59:39,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5651 states. [2021-06-05 07:59:39,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5651 to 4228. [2021-06-05 07:59:39,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:39,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 07:59:39,261 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 07:59:39,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:39,261 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 07:59:39,261 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 07:59:39,261 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 07:59:39,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 07:59:39,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:39,264 INFO L521 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 07:59:39,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:39,465 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:39,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:39,465 INFO L82 PathProgramCache]: Analyzing trace with hash 474784959, now seen corresponding path program 189 times [2021-06-05 07:59:39,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:39,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710350686] [2021-06-05 07:59:39,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:39,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:39,679 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 07:59:39,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:39,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710350686] [2021-06-05 07:59:39,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710350686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:39,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760617551] [2021-06-05 07:59:39,680 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 07:59:39,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 07:59:39,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:39,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:59:39,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:39,905 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 07:59:39,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760617551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:39,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:39,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 07:59:39,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747369683] [2021-06-05 07:59:39,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:59:39,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:39,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:59:39,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:59:39,906 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 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 07:59:40,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:40,398 INFO L93 Difference]: Finished difference Result 5871 states and 15297 transitions. [2021-06-05 07:59:40,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:59:40,399 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 07:59:40,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:40,404 INFO L225 Difference]: With dead ends: 5871 [2021-06-05 07:59:40,404 INFO L226 Difference]: Without dead ends: 5601 [2021-06-05 07:59:40,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 542.5ms TimeCoverageRelationStatistics Valid=696, Invalid=2166, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:59:40,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5601 states. [2021-06-05 07:59:40,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5601 to 4228. [2021-06-05 07:59:40,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:40,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 07:59:40,464 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 07:59:40,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:40,464 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 07:59:40,464 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 07:59:40,464 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 07:59:40,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 07:59:40,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:40,468 INFO L521 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 07:59:40,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:40,668 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:40,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:40,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1140168531, now seen corresponding path program 190 times [2021-06-05 07:59:40,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:40,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173699465] [2021-06-05 07:59:40,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:40,862 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 07:59:40,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:40,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173699465] [2021-06-05 07:59:40,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173699465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:40,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453294789] [2021-06-05 07:59:40,863 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 07:59:40,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:59:40,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:40,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:59:40,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:41,061 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 07:59:41,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453294789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:41,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:41,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 07:59:41,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348833940] [2021-06-05 07:59:41,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:59:41,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:41,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:59:41,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:59:41,062 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 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 07:59:41,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:41,506 INFO L93 Difference]: Finished difference Result 5821 states and 15197 transitions. [2021-06-05 07:59:41,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:59:41,507 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 07:59:41,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:41,512 INFO L225 Difference]: With dead ends: 5821 [2021-06-05 07:59:41,512 INFO L226 Difference]: Without dead ends: 5551 [2021-06-05 07:59:41,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 473.7ms TimeCoverageRelationStatistics Valid=642, Invalid=2010, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:59:41,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5551 states. [2021-06-05 07:59:41,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5551 to 4228. [2021-06-05 07:59:41,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:41,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 07:59:41,557 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 07:59:41,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:41,558 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 07:59:41,558 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 07:59:41,558 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 07:59:41,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 07:59:41,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:41,561 INFO L521 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 07:59:41,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:41,762 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:41,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:41,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1520612483, now seen corresponding path program 191 times [2021-06-05 07:59:41,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:41,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229752387] [2021-06-05 07:59:41,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:41,974 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 07:59:41,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:41,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229752387] [2021-06-05 07:59:41,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229752387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:41,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327187736] [2021-06-05 07:59:41,975 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 07:59:42,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 07:59:42,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:42,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:59:42,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:42,191 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 07:59:42,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327187736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:42,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:42,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 07:59:42,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656132535] [2021-06-05 07:59:42,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:59:42,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:42,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:59:42,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:59:42,192 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 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 07:59:42,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:42,744 INFO L93 Difference]: Finished difference Result 5771 states and 15097 transitions. [2021-06-05 07:59:42,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 07:59:42,744 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 07:59:42,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:42,768 INFO L225 Difference]: With dead ends: 5771 [2021-06-05 07:59:42,768 INFO L226 Difference]: Without dead ends: 5501 [2021-06-05 07:59:42,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 581.7ms TimeCoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:59:42,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5501 states. [2021-06-05 07:59:42,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5501 to 4228. [2021-06-05 07:59:42,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:42,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 07:59:42,809 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 07:59:42,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:42,809 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 07:59:42,809 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 07:59:42,809 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 07:59:42,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 07:59:42,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:42,813 INFO L521 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 07:59:43,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 07:59:43,013 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:43,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:43,013 INFO L82 PathProgramCache]: Analyzing trace with hash -896237333, now seen corresponding path program 192 times [2021-06-05 07:59:43,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:43,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437479388] [2021-06-05 07:59:43,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:43,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:43,199 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 07:59:43,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:43,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437479388] [2021-06-05 07:59:43,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437479388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:43,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767593606] [2021-06-05 07:59:43,200 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 07:59:43,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 07:59:43,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:43,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:59:43,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:43,407 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 07:59:43,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767593606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:43,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:43,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 07:59:43,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151016283] [2021-06-05 07:59:43,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:59:43,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:43,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:59:43,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:59:43,408 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 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 07:59:43,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:43,916 INFO L93 Difference]: Finished difference Result 5721 states and 14997 transitions. [2021-06-05 07:59:43,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:59:43,916 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 07:59:43,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:43,922 INFO L225 Difference]: With dead ends: 5721 [2021-06-05 07:59:43,922 INFO L226 Difference]: Without dead ends: 5451 [2021-06-05 07:59:43,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 493.0ms TimeCoverageRelationStatistics Valid=679, Invalid=2183, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:59:43,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5451 states. [2021-06-05 07:59:43,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5451 to 4228. [2021-06-05 07:59:43,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:43,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 07:59:43,966 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 07:59:43,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:43,966 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 07:59:43,966 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 07:59:43,966 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 07:59:43,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 07:59:43,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:43,969 INFO L521 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 07:59:44,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 07:59:44,170 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:44,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:44,170 INFO L82 PathProgramCache]: Analyzing trace with hash -87185477, now seen corresponding path program 193 times [2021-06-05 07:59:44,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:44,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858367369] [2021-06-05 07:59:44,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:44,367 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 07:59:44,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:44,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858367369] [2021-06-05 07:59:44,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858367369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:44,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837410688] [2021-06-05 07:59:44,368 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 07:59:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:44,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:59:44,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:44,580 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 07:59:44,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837410688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:44,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:44,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 07:59:44,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581074666] [2021-06-05 07:59:44,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:59:44,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:44,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:59:44,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:59:44,581 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 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 07:59:45,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:45,231 INFO L93 Difference]: Finished difference Result 5671 states and 14897 transitions. [2021-06-05 07:59:45,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:59:45,232 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 07:59:45,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:45,236 INFO L225 Difference]: With dead ends: 5671 [2021-06-05 07:59:45,236 INFO L226 Difference]: Without dead ends: 5401 [2021-06-05 07:59:45,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 610.8ms TimeCoverageRelationStatistics Valid=770, Invalid=2536, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 07:59:45,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5401 states. [2021-06-05 07:59:45,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5401 to 4228. [2021-06-05 07:59:45,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:45,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 07:59:45,277 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 07:59:45,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:45,277 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 07:59:45,277 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 07:59:45,277 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 07:59:45,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 07:59:45,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:45,280 INFO L521 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 07:59:45,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 07:59:45,481 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:45,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:45,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1479135575, now seen corresponding path program 194 times [2021-06-05 07:59:45,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:45,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225959924] [2021-06-05 07:59:45,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:45,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:45,666 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 07:59:45,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:45,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225959924] [2021-06-05 07:59:45,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225959924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:45,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452977317] [2021-06-05 07:59:45,667 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 07:59:45,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:59:45,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:45,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:59:45,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:45,871 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 07:59:45,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452977317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:45,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:45,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 07:59:45,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566916115] [2021-06-05 07:59:45,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:59:45,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:45,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:59:45,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:59:45,872 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 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 07:59:46,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:46,395 INFO L93 Difference]: Finished difference Result 5621 states and 14797 transitions. [2021-06-05 07:59:46,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 07:59:46,396 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 07:59:46,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:46,401 INFO L225 Difference]: With dead ends: 5621 [2021-06-05 07:59:46,401 INFO L226 Difference]: Without dead ends: 5351 [2021-06-05 07:59:46,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 516.5ms TimeCoverageRelationStatistics Valid=732, Invalid=2348, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:59:46,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5351 states. [2021-06-05 07:59:46,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5351 to 4228. [2021-06-05 07:59:46,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:46,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 07:59:46,445 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 07:59:46,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:46,445 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 07:59:46,445 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 07:59:46,445 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 07:59:46,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 07:59:46,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:46,448 INFO L521 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 07:59:46,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 07:59:46,649 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:46,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:46,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1724212871, now seen corresponding path program 195 times [2021-06-05 07:59:46,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:46,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798203319] [2021-06-05 07:59:46,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:46,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:46,838 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 07:59:46,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:46,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798203319] [2021-06-05 07:59:46,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798203319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:46,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713567433] [2021-06-05 07:59:46,839 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 07:59:46,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 07:59:46,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:46,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:59:46,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:47,056 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 07:59:47,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713567433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:47,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:47,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 07:59:47,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438764706] [2021-06-05 07:59:47,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:59:47,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:47,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:59:47,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:59:47,058 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 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 07:59:47,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:47,748 INFO L93 Difference]: Finished difference Result 5571 states and 14697 transitions. [2021-06-05 07:59:47,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 07:59:47,749 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 07:59:47,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:47,754 INFO L225 Difference]: With dead ends: 5571 [2021-06-05 07:59:47,754 INFO L226 Difference]: Without dead ends: 5301 [2021-06-05 07:59:47,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 656.9ms TimeCoverageRelationStatistics Valid=831, Invalid=2709, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 07:59:47,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5301 states. [2021-06-05 07:59:47,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5301 to 4228. [2021-06-05 07:59:47,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:47,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 07:59:47,796 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 07:59:47,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:47,796 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 07:59:47,796 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 07:59:47,796 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 07:59:47,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 07:59:47,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:47,799 INFO L521 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 07:59:48,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:48,000 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:48,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:48,000 INFO L82 PathProgramCache]: Analyzing trace with hash -2101063193, now seen corresponding path program 196 times [2021-06-05 07:59:48,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:48,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877550725] [2021-06-05 07:59:48,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:48,178 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 07:59:48,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:48,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877550725] [2021-06-05 07:59:48,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877550725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:48,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094322356] [2021-06-05 07:59:48,179 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 07:59:48,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:59:48,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:48,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:59:48,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:48,377 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 07:59:48,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094322356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:48,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:48,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 07:59:48,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637385401] [2021-06-05 07:59:48,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:59:48,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:48,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:59:48,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:59:48,378 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 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 07:59:48,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:48,936 INFO L93 Difference]: Finished difference Result 5521 states and 14597 transitions. [2021-06-05 07:59:48,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 07:59:48,936 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 07:59:48,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:48,941 INFO L225 Difference]: With dead ends: 5521 [2021-06-05 07:59:48,941 INFO L226 Difference]: Without dead ends: 5251 [2021-06-05 07:59:48,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 543.9ms TimeCoverageRelationStatistics Valid=801, Invalid=2505, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 07:59:48,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5251 states. [2021-06-05 07:59:48,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5251 to 4228. [2021-06-05 07:59:48,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:48,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 07:59:48,979 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 07:59:48,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:48,979 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 07:59:48,979 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 07:59:48,979 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 07:59:48,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 07:59:48,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:48,982 INFO L521 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 07:59:49,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-05 07:59:49,183 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:49,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:49,183 INFO L82 PathProgramCache]: Analyzing trace with hash -774307657, now seen corresponding path program 197 times [2021-06-05 07:59:49,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:49,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341212953] [2021-06-05 07:59:49,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:49,376 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 07:59:49,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:49,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341212953] [2021-06-05 07:59:49,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341212953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:49,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989866241] [2021-06-05 07:59:49,377 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 07:59:49,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 07:59:49,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:49,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:59:49,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:49,586 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 07:59:49,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989866241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:49,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:49,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 07:59:49,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595425891] [2021-06-05 07:59:49,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:59:49,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:49,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:59:49,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:59:49,587 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 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 07:59:50,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:50,325 INFO L93 Difference]: Finished difference Result 5471 states and 14497 transitions. [2021-06-05 07:59:50,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 07:59:50,326 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 07:59:50,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:50,331 INFO L225 Difference]: With dead ends: 5471 [2021-06-05 07:59:50,331 INFO L226 Difference]: Without dead ends: 5201 [2021-06-05 07:59:50,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 693.9ms TimeCoverageRelationStatistics Valid=908, Invalid=2874, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 07:59:50,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5201 states. [2021-06-05 07:59:50,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5201 to 4228. [2021-06-05 07:59:50,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:50,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 07:59:50,372 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 07:59:50,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:50,372 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 07:59:50,372 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 07:59:50,372 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 07:59:50,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 07:59:50,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:50,375 INFO L521 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 07:59:50,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:50,576 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:50,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:50,576 INFO L82 PathProgramCache]: Analyzing trace with hash -320091483, now seen corresponding path program 198 times [2021-06-05 07:59:50,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:50,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312563169] [2021-06-05 07:59:50,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:50,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:50,751 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 07:59:50,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:50,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312563169] [2021-06-05 07:59:50,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312563169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:50,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514395329] [2021-06-05 07:59:50,751 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 07:59:50,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 07:59:50,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:50,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:59:50,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:50,951 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 07:59:50,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514395329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:50,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:50,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 07:59:50,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840994447] [2021-06-05 07:59:50,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:59:50,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:50,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:59:50,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:59:50,952 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 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 07:59:51,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:51,567 INFO L93 Difference]: Finished difference Result 5421 states and 14397 transitions. [2021-06-05 07:59:51,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 07:59:51,568 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 07:59:51,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:51,573 INFO L225 Difference]: With dead ends: 5421 [2021-06-05 07:59:51,573 INFO L226 Difference]: Without dead ends: 5151 [2021-06-05 07:59:51,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 567.3ms TimeCoverageRelationStatistics Valid=886, Invalid=2654, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 07:59:51,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5151 states. [2021-06-05 07:59:51,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5151 to 4228. [2021-06-05 07:59:51,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:51,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 07:59:51,615 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 07:59:51,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:51,616 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 07:59:51,616 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 07:59:51,616 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 07:59:51,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 07:59:51,619 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:51,619 INFO L521 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 07:59:51,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 07:59:51,819 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:51,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:51,820 INFO L82 PathProgramCache]: Analyzing trace with hash 678804853, now seen corresponding path program 199 times [2021-06-05 07:59:51,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:51,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202329277] [2021-06-05 07:59:51,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:52,023 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 07:59:52,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:52,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202329277] [2021-06-05 07:59:52,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202329277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:52,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271822053] [2021-06-05 07:59:52,023 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 07:59:52,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:52,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:59:52,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:52,237 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 07:59:52,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271822053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:52,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:52,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 07:59:52,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863989267] [2021-06-05 07:59:52,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:59:52,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:52,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:59:52,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:59:52,238 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 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 07:59:53,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:53,006 INFO L93 Difference]: Finished difference Result 5371 states and 14297 transitions. [2021-06-05 07:59:53,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 07:59:53,006 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 07:59:53,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:53,011 INFO L225 Difference]: With dead ends: 5371 [2021-06-05 07:59:53,011 INFO L226 Difference]: Without dead ends: 5101 [2021-06-05 07:59:53,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 743.5ms TimeCoverageRelationStatistics Valid=1001, Invalid=3031, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 07:59:53,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5101 states. [2021-06-05 07:59:53,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5101 to 4228. [2021-06-05 07:59:53,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:53,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 07:59:53,052 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 07:59:53,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:53,052 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 07:59:53,052 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 07:59:53,052 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 07:59:53,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 07:59:53,055 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:53,055 INFO L521 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 07:59:53,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:53,256 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:53,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:53,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1200523037, now seen corresponding path program 200 times [2021-06-05 07:59:53,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:53,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830085125] [2021-06-05 07:59:53,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:53,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:53,484 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 07:59:53,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:53,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830085125] [2021-06-05 07:59:53,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830085125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:53,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619519209] [2021-06-05 07:59:53,485 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 07:59:53,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:59:53,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:53,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:59:53,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:53,697 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 07:59:53,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619519209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:53,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:53,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 07:59:53,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170681257] [2021-06-05 07:59:53,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:59:53,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:53,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:59:53,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:59:53,698 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 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 07:59:54,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:54,380 INFO L93 Difference]: Finished difference Result 5321 states and 14197 transitions. [2021-06-05 07:59:54,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 07:59:54,381 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 07:59:54,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:54,385 INFO L225 Difference]: With dead ends: 5321 [2021-06-05 07:59:54,385 INFO L226 Difference]: Without dead ends: 5051 [2021-06-05 07:59:54,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 649.1ms TimeCoverageRelationStatistics Valid=987, Invalid=2795, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 07:59:54,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2021-06-05 07:59:54,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 4228. [2021-06-05 07:59:54,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:54,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 07:59:54,426 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 07:59:54,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:54,427 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 07:59:54,427 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 07:59:54,427 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 07:59:54,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 07:59:54,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:54,430 INFO L521 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 07:59:54,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:54,631 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:54,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:54,631 INFO L82 PathProgramCache]: Analyzing trace with hash 829796275, now seen corresponding path program 201 times [2021-06-05 07:59:54,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:54,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189547873] [2021-06-05 07:59:54,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:54,808 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 07:59:54,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:54,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189547873] [2021-06-05 07:59:54,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189547873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:54,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686135832] [2021-06-05 07:59:54,808 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 07:59:54,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 07:59:54,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:54,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:59:54,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:55,021 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 07:59:55,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686135832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:55,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:55,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 07:59:55,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413547850] [2021-06-05 07:59:55,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:59:55,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:55,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:59:55,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:59:55,022 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 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 07:59:55,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:55,829 INFO L93 Difference]: Finished difference Result 5271 states and 14097 transitions. [2021-06-05 07:59:55,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 07:59:55,829 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 07:59:55,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:55,834 INFO L225 Difference]: With dead ends: 5271 [2021-06-05 07:59:55,834 INFO L226 Difference]: Without dead ends: 5001 [2021-06-05 07:59:55,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 769.5ms TimeCoverageRelationStatistics Valid=1110, Invalid=3180, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 07:59:55,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5001 states. [2021-06-05 07:59:55,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5001 to 4228. [2021-06-05 07:59:55,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:55,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 07:59:55,880 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 07:59:55,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:55,880 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 07:59:55,880 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 07:59:55,881 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 07:59:55,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 07:59:55,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:55,884 INFO L521 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 07:59:56,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:56,084 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:56,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:56,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1444035745, now seen corresponding path program 202 times [2021-06-05 07:59:56,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:56,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78115261] [2021-06-05 07:59:56,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:56,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:56,257 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 07:59:56,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:56,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78115261] [2021-06-05 07:59:56,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78115261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:56,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486922512] [2021-06-05 07:59:56,257 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 07:59:56,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:59:56,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:56,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:59:56,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:56,447 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 07:59:56,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486922512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:56,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:56,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 07:59:56,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73529144] [2021-06-05 07:59:56,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:59:56,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:56,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:59:56,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:59:56,448 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 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 07:59:57,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:57,107 INFO L93 Difference]: Finished difference Result 5221 states and 13997 transitions. [2021-06-05 07:59:57,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:59:57,108 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 07:59:57,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:57,112 INFO L225 Difference]: With dead ends: 5221 [2021-06-05 07:59:57,112 INFO L226 Difference]: Without dead ends: 4951 [2021-06-05 07:59:57,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 636.6ms TimeCoverageRelationStatistics Valid=1104, Invalid=2928, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 07:59:57,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4951 states. [2021-06-05 07:59:57,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4951 to 4228. [2021-06-05 07:59:57,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:57,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 07:59:57,151 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 07:59:57,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:57,151 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 07:59:57,151 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 07:59:57,152 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 07:59:57,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 07:59:57,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:57,155 INFO L521 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 07:59:57,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-05 07:59:57,355 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:57,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:57,356 INFO L82 PathProgramCache]: Analyzing trace with hash -271206543, now seen corresponding path program 203 times [2021-06-05 07:59:57,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:57,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171458618] [2021-06-05 07:59:57,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:57,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:57,529 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 07:59:57,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:57,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171458618] [2021-06-05 07:59:57,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171458618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:57,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588257473] [2021-06-05 07:59:57,530 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 07:59:57,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 07:59:57,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:57,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:59:57,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:57,735 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 07:59:57,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588257473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:57,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:57,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 07:59:57,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236854936] [2021-06-05 07:59:57,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:59:57,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:57,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:59:57,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:59:57,736 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 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 07:59:58,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:58,619 INFO L93 Difference]: Finished difference Result 5679 states and 15263 transitions. [2021-06-05 07:59:58,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 07:59:58,620 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 07:59:58,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:58,625 INFO L225 Difference]: With dead ends: 5679 [2021-06-05 07:59:58,625 INFO L226 Difference]: Without dead ends: 5056 [2021-06-05 07:59:58,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 830.9ms TimeCoverageRelationStatistics Valid=1256, Invalid=3574, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 07:59:58,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5056 states. [2021-06-05 07:59:58,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5056 to 4138. [2021-06-05 07:59:58,667 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 07:59:58,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4138 states to 4138 states and 11648 transitions. [2021-06-05 07:59:58,672 INFO L78 Accepts]: Start accepts. Automaton has 4138 states and 11648 transitions. Word has length 130 [2021-06-05 07:59:58,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:58,673 INFO L482 AbstractCegarLoop]: Abstraction has 4138 states and 11648 transitions. [2021-06-05 07:59:58,673 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 07:59:58,673 INFO L276 IsEmpty]: Start isEmpty. Operand 4138 states and 11648 transitions. [2021-06-05 07:59:58,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 07:59:58,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:58,676 INFO L521 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 07:59:58,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 07:59:58,876 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:58,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:58,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1303854145, now seen corresponding path program 204 times [2021-06-05 07:59:58,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:58,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712461505] [2021-06-05 07:59:58,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:59,047 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 07:59:59,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:59,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712461505] [2021-06-05 07:59:59,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712461505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:59,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420575271] [2021-06-05 07:59:59,048 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 07:59:59,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 07:59:59,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:59,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:59:59,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:59,266 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 07:59:59,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420575271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:59,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:59,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 07:59:59,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521841529] [2021-06-05 07:59:59,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:59:59,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:59,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:59:59,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:59:59,267 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 07:59:59,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:59,954 INFO L93 Difference]: Finished difference Result 5908 states and 15981 transitions. [2021-06-05 07:59:59,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 07:59:59,955 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 07:59:59,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:59,960 INFO L225 Difference]: With dead ends: 5908 [2021-06-05 07:59:59,960 INFO L226 Difference]: Without dead ends: 5638 [2021-06-05 07:59:59,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 645.2ms TimeCoverageRelationStatistics Valid=1238, Invalid=3052, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 07:59:59,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5638 states. [2021-06-05 07:59:59,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5638 to 4318. [2021-06-05 07:59:59,998 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 08:00:00,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4318 states to 4318 states and 12207 transitions. [2021-06-05 08:00:00,004 INFO L78 Accepts]: Start accepts. Automaton has 4318 states and 12207 transitions. Word has length 130 [2021-06-05 08:00:00,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 08:00:00,004 INFO L482 AbstractCegarLoop]: Abstraction has 4318 states and 12207 transitions. [2021-06-05 08:00:00,004 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 08:00:00,004 INFO L276 IsEmpty]: Start isEmpty. Operand 4318 states and 12207 transitions. [2021-06-05 08:00:00,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 08:00:00,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 08:00:00,007 INFO L521 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 08:00:00,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 08:00:00,208 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 08:00:00,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 08:00:00,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1281510895, now seen corresponding path program 205 times [2021-06-05 08:00:00,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 08:00:00,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673353148] [2021-06-05 08:00:00,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 08:00:00,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 08:00:00,378 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 08:00:00,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 08:00:00,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673353148] [2021-06-05 08:00:00,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673353148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:00,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590055141] [2021-06-05 08:00:00,378 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 08:00:00,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 08:00:00,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 08:00:00,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 08:00:00,577 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 08:00:00,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590055141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:00,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 08:00:00,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 08:00:00,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059831255] [2021-06-05 08:00:00,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 08:00:00,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 08:00:00,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 08:00:00,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-06-05 08:00:00,578 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 08:00:01,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 08:00:01,444 INFO L93 Difference]: Finished difference Result 5203 states and 14105 transitions. [2021-06-05 08:00:01,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 08:00:01,445 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 08:00:01,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 08:00:01,449 INFO L225 Difference]: With dead ends: 5203 [2021-06-05 08:00:01,449 INFO L226 Difference]: Without dead ends: 4831 [2021-06-05 08:00:01,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 835.8ms TimeCoverageRelationStatistics Valid=1351, Invalid=3341, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 08:00:01,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4831 states. [2021-06-05 08:00:01,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4831 to 4233. [2021-06-05 08:00:01,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4233 states, 4232 states have (on average 2.81734404536862) internal successors, (11923), 4232 states have internal predecessors, (11923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 08:00:01,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4233 states to 4233 states and 11923 transitions. [2021-06-05 08:00:01,494 INFO L78 Accepts]: Start accepts. Automaton has 4233 states and 11923 transitions. Word has length 130 [2021-06-05 08:00:01,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 08:00:01,494 INFO L482 AbstractCegarLoop]: Abstraction has 4233 states and 11923 transitions. [2021-06-05 08:00:01,494 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 08:00:01,494 INFO L276 IsEmpty]: Start isEmpty. Operand 4233 states and 11923 transitions. [2021-06-05 08:00:01,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 08:00:01,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 08:00:01,498 INFO L521 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 08:00:01,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 08:00:01,698 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 08:00:01,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 08:00:01,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1365615058, now seen corresponding path program 206 times [2021-06-05 08:00:01,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 08:00:01,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399132149] [2021-06-05 08:00:01,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 08:00:01,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 08:00:01,888 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 397 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:01,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 08:00:01,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399132149] [2021-06-05 08:00:01,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399132149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:01,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186047805] [2021-06-05 08:00:01,888 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 08:00:01,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 08:00:01,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 08:00:01,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 08:00:01,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 08:00:02,119 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 443 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:02,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186047805] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 08:00:02,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 08:00:02,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2021-06-05 08:00:02,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967419098] [2021-06-05 08:00:02,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 08:00:02,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 08:00:02,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 08:00:02,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-06-05 08:00:02,121 INFO L87 Difference]: Start difference. First operand 4233 states and 11923 transitions. Second operand has 23 states, 23 states have (on average 5.869565217391305) internal successors, (135), 23 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 08:00:02,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 08:00:02,429 INFO L93 Difference]: Finished difference Result 19732 states and 54883 transitions. [2021-06-05 08:00:02,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 08:00:02,430 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.869565217391305) internal successors, (135), 23 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have 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 08:00:02,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 08:00:02,432 INFO L225 Difference]: With dead ends: 19732 [2021-06-05 08:00:02,433 INFO L226 Difference]: Without dead ends: 2029 [2021-06-05 08:00:02,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 326.1ms TimeCoverageRelationStatistics Valid=609, Invalid=1371, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 08:00:02,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2021-06-05 08:00:02,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 2029. [2021-06-05 08:00:02,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2029 states, 2028 states have (on average 2.5631163708086784) internal successors, (5198), 2028 states have internal predecessors, (5198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 08:00:02,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 5198 transitions. [2021-06-05 08:00:02,455 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 5198 transitions. Word has length 135 [2021-06-05 08:00:02,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 08:00:02,455 INFO L482 AbstractCegarLoop]: Abstraction has 2029 states and 5198 transitions. [2021-06-05 08:00:02,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.869565217391305) internal successors, (135), 23 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 08:00:02,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 5198 transitions. [2021-06-05 08:00:02,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 08:00:02,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 08:00:02,458 INFO L521 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 08:00:02,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-06-05 08:00:02,673 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 08:00:02,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 08:00:02,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1607180635, now seen corresponding path program 207 times [2021-06-05 08:00:02,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 08:00:02,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090009581] [2021-06-05 08:00:02,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 08:00:02,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 08:00:02,863 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 406 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:02,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 08:00:02,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090009581] [2021-06-05 08:00:02,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090009581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:02,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968929400] [2021-06-05 08:00:02,863 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 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 08:00:02,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 08:00:02,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 08:00:02,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 08:00:02,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 08:00:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 443 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:03,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968929400] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 08:00:03,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 08:00:03,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2021-06-05 08:00:03,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192066118] [2021-06-05 08:00:03,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 08:00:03,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 08:00:03,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 08:00:03,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-06-05 08:00:03,094 INFO L87 Difference]: Start difference. First operand 2029 states and 5198 transitions. Second operand has 23 states, 23 states have (on average 5.869565217391305) internal successors, (135), 23 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 08:00:03,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 08:00:03,343 INFO L93 Difference]: Finished difference Result 8213 states and 20540 transitions. [2021-06-05 08:00:03,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 08:00:03,343 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.869565217391305) internal successors, (135), 23 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have 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 08:00:03,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 08:00:03,344 INFO L225 Difference]: With dead ends: 8213 [2021-06-05 08:00:03,344 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 08:00:03,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 307.3ms TimeCoverageRelationStatistics Valid=609, Invalid=1371, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 08:00:03,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 08:00:03,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 08:00:03,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 08:00:03,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 08:00:03,344 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2021-06-05 08:00:03,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 08:00:03,344 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 08:00:03,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.869565217391305) internal successors, (135), 23 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 08:00:03,345 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 08:00:03,345 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 08:00:03,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 08:00:03,548 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 08:00:03,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 08:00:03 BasicIcfg [2021-06-05 08:00:03,550 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 08:00:03,550 INFO L168 Benchmark]: Toolchain (without parser) took 211435.47 ms. Allocated memory was 352.3 MB in the beginning and 1.1 GB in the end (delta: 790.6 MB). Free memory was 315.2 MB in the beginning and 583.7 MB in the end (delta: -268.6 MB). Peak memory consumption was 523.9 MB. Max. memory is 16.0 GB. [2021-06-05 08:00:03,550 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 352.3 MB. Free memory is still 332.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 08:00:03,550 INFO L168 Benchmark]: CACSL2BoogieTranslator took 417.98 ms. Allocated memory is still 352.3 MB. Free memory was 314.9 MB in the beginning and 317.1 MB in the end (delta: -2.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.0 GB. [2021-06-05 08:00:03,550 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.31 ms. Allocated memory is still 352.3 MB. Free memory was 317.1 MB in the beginning and 315.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 08:00:03,550 INFO L168 Benchmark]: Boogie Preprocessor took 29.60 ms. Allocated memory is still 352.3 MB. Free memory was 315.0 MB in the beginning and 314.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 08:00:03,550 INFO L168 Benchmark]: RCFGBuilder took 307.99 ms. Allocated memory is still 352.3 MB. Free memory was 314.0 MB in the beginning and 289.8 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-06-05 08:00:03,551 INFO L168 Benchmark]: TraceAbstraction took 210641.57 ms. Allocated memory was 352.3 MB in the beginning and 1.1 GB in the end (delta: 790.6 MB). Free memory was 289.8 MB in the beginning and 583.7 MB in the end (delta: -293.9 MB). Peak memory consumption was 498.8 MB. Max. memory is 16.0 GB. [2021-06-05 08:00:03,551 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 352.3 MB. Free memory is still 332.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 417.98 ms. Allocated memory is still 352.3 MB. Free memory was 314.9 MB in the beginning and 317.1 MB in the end (delta: -2.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 30.31 ms. Allocated memory is still 352.3 MB. Free memory was 317.1 MB in the beginning and 315.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 29.60 ms. Allocated memory is still 352.3 MB. Free memory was 315.0 MB in the beginning and 314.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 307.99 ms. Allocated memory is still 352.3 MB. Free memory was 314.0 MB in the beginning and 289.8 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 210641.57 ms. Allocated memory was 352.3 MB in the beginning and 1.1 GB in the end (delta: 790.6 MB). Free memory was 289.8 MB in the beginning and 583.7 MB in the end (delta: -293.9 MB). Peak memory consumption was 498.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 210550.2ms, OverallIterations: 216, TraceHistogramMax: 11, EmptinessCheckTime: 559.4ms, AutomataDifference: 89185.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 126.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 21211 SDtfs, 160301 SDslu, 179507 SDs, 0 SdLazy, 32476 SolverSat, 23964 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17362.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29974 GetRequests, 20942 SyntacticMatches, 0 SemanticMatches, 9032 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97727 ImplicationChecksByTransitivity, 85301.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4318occurred in iteration=213, InterpolantAutomatonStates: 6731, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 7379.0ms AutomataMinimizationTime, 216 MinimizatonAttempts, 175122 StatesRemovedByMinimization, 214 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2124.5ms SsaConstructionTime, 5489.7ms SatisfiabilityAnalysisTime, 55198.9ms InterpolantComputationTime, 42018 NumberOfCodeBlocks, 42018 NumberOfCodeBlocksAsserted, 1201 NumberOfCheckSat, 41592 ConstructedInterpolants, 0 QuantifiedInterpolants, 171420 SizeOfPredicates, 3134 NumberOfNonLiveVariables, 43512 ConjunctsInSsa, 4179 ConjunctsInUnsatCore, 426 InterpolantComputations, 8 PerfectInterpolantSequences, 1690/83616 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...