/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 18:15:50,260 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 18:15:50,262 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 18:15:50,288 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 18:15:50,289 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 18:15:50,289 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 18:15:50,290 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 18:15:50,292 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 18:15:50,293 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 18:15:50,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 18:15:50,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 18:15:50,295 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 18:15:50,295 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 18:15:50,296 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 18:15:50,296 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 18:15:50,297 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 18:15:50,298 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 18:15:50,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 18:15:50,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 18:15:50,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 18:15:50,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 18:15:50,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 18:15:50,305 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 18:15:50,308 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 18:15:50,310 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-05 18:15:50,311 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-05 18:15:50,311 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-05 18:15:50,311 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-05 18:15:50,312 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-05 18:15:50,312 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2021-06-05 18:15:50,320 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 18:15:50,321 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 18:15:50,321 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 18:15:50,325 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 18:15:50,345 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 18:15:50,345 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 18:15:50,346 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 18:15:50,346 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 18:15:50,348 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 18:15:50,348 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 18:15:50,348 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 18:15:50,348 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 18:15:50,348 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 18:15:50,348 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 18:15:50,349 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 18:15:50,349 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 18:15:50,349 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 18:15:50,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 18:15:50,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 18:15:50,349 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 18:15:50,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 18:15:50,350 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 18:15:50,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 18:15:50,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 18:15:50,350 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 18:15:50,350 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 18:15:50,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 18:15:50,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 18:15:50,350 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 18:15:50,350 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 18:15:50,351 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 18:15:50,351 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 18:15:50,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 18:15:50,351 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 18:15:50,351 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 18:15:50,351 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 18:15:50,626 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 18:15:50,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 18:15:50,649 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 18:15:50,650 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-05 18:15:50,651 INFO L275 PluginConnector]: CDTParser initialized [2021-06-05 18:15:50,651 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2021-06-05 18:15:50,703 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef91066a3/fff391da91384c389e576e1449c416ba/FLAGde23316b3 [2021-06-05 18:15:51,099 INFO L306 CDTParser]: Found 1 translation units. [2021-06-05 18:15:51,099 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2021-06-05 18:15:51,108 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef91066a3/fff391da91384c389e576e1449c416ba/FLAGde23316b3 [2021-06-05 18:15:51,125 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef91066a3/fff391da91384c389e576e1449c416ba [2021-06-05 18:15:51,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 18:15:51,127 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-05 18:15:51,129 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-05 18:15:51,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-05 18:15:51,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-05 18:15:51,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 06:15:51" (1/1) ... [2021-06-05 18:15:51,132 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16de3e2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:15:51, skipping insertion in model container [2021-06-05 18:15:51,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 06:15:51" (1/1) ... [2021-06-05 18:15:51,137 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-05 18:15:51,169 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-05 18:15:51,409 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-1.i[30950,30963] [2021-06-05 18:15:51,413 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 18:15:51,419 INFO L203 MainTranslator]: Completed pre-run [2021-06-05 18:15:51,470 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-1.i[30950,30963] [2021-06-05 18:15:51,471 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 18:15:51,513 INFO L208 MainTranslator]: Completed translation [2021-06-05 18:15:51,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:15:51 WrapperNode [2021-06-05 18:15:51,514 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-05 18:15:51,514 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 18:15:51,514 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 18:15:51,514 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 18:15:51,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:15:51" (1/1) ... [2021-06-05 18:15:51,528 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:15:51" (1/1) ... [2021-06-05 18:15:51,544 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 18:15:51,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 18:15:51,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 18:15:51,545 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 18:15:51,550 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:15:51" (1/1) ... [2021-06-05 18:15:51,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:15:51" (1/1) ... [2021-06-05 18:15:51,552 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:15:51" (1/1) ... [2021-06-05 18:15:51,552 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:15:51" (1/1) ... [2021-06-05 18:15:51,555 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:15:51" (1/1) ... [2021-06-05 18:15:51,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:15:51" (1/1) ... [2021-06-05 18:15:51,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:15:51" (1/1) ... [2021-06-05 18:15:51,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 18:15:51,561 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 18:15:51,561 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 18:15:51,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 18:15:51,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:15:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 18:15:51,609 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-06-05 18:15:51,609 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-06-05 18:15:51,609 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-06-05 18:15:51,610 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-06-05 18:15:51,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-05 18:15:51,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-06-05 18:15:51,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-05 18:15:51,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-05 18:15:51,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-05 18:15:51,612 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-06-05 18:15:51,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 18:15:51,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 18:15:51,614 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 18:15:51,845 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 18:15:51,845 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-06-05 18:15:51,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:15:51 BoogieIcfgContainer [2021-06-05 18:15:51,846 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 18:15:51,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 18:15:51,847 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 18:15:51,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 18:15:51,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.06 06:15:51" (1/3) ... [2021-06-05 18:15:51,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f83b988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:15:51, skipping insertion in model container [2021-06-05 18:15:51,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:15:51" (2/3) ... [2021-06-05 18:15:51,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f83b988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:15:51, skipping insertion in model container [2021-06-05 18:15:51,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:15:51" (3/3) ... [2021-06-05 18:15:51,851 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2021-06-05 18:15:51,855 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 18:15:51,855 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 18:15:51,855 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 18:15:51,856 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 18:15:51,871 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,871 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,871 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,872 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,872 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,872 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,872 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,872 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,872 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,872 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,872 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,873 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,873 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,873 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,873 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,873 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,873 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,873 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,873 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,874 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,874 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,874 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,874 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,874 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,874 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,874 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,874 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,874 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,875 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,875 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,875 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,875 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,875 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,875 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,875 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,875 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,876 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,876 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,876 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,876 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,876 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,876 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,876 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,876 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,877 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,877 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,877 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,877 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,877 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,877 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,877 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,877 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,877 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,878 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,878 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,878 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,879 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,879 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,879 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,880 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,880 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,880 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,883 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,883 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,883 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,883 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,884 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,884 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:15:51,885 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 18:15:51,899 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 18:15:51,912 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 18:15:51,913 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 18:15:51,913 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 18:15:51,913 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 18:15:51,913 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 18:15:51,913 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 18:15:51,913 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 18:15:51,913 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 18:15:51,920 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 66 transitions, 142 flow [2021-06-05 18:15:51,975 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:51,979 INFO L276 IsEmpty]: Start isEmpty. Operand has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:51,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 18:15:51,987 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:51,988 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:51,988 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:51,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:51,992 INFO L82 PathProgramCache]: Analyzing trace with hash 855509438, now seen corresponding path program 1 times [2021-06-05 18:15:51,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:51,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816082729] [2021-06-05 18:15:51,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:52,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:52,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:15:52,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:52,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816082729] [2021-06-05 18:15:52,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816082729] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:15:52,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:15:52,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 18:15:52,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489668385] [2021-06-05 18:15:52,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 18:15:52,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:52,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 18:15:52,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 18:15:52,320 INFO L87 Difference]: Start difference. First operand has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:52,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:52,487 INFO L93 Difference]: Finished difference Result 3467 states and 10030 transitions. [2021-06-05 18:15:52,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 18:15:52,488 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 18:15:52,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:52,509 INFO L225 Difference]: With dead ends: 3467 [2021-06-05 18:15:52,509 INFO L226 Difference]: Without dead ends: 1242 [2021-06-05 18:15:52,511 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:15:52,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2021-06-05 18:15:52,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 942. [2021-06-05 18:15:52,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 941 states have (on average 2.7077577045696066) internal successors, (2548), 941 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:52,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 2548 transitions. [2021-06-05 18:15:52,601 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 2548 transitions. Word has length 32 [2021-06-05 18:15:52,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:52,601 INFO L482 AbstractCegarLoop]: Abstraction has 942 states and 2548 transitions. [2021-06-05 18:15:52,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:52,601 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 2548 transitions. [2021-06-05 18:15:52,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 18:15:52,604 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:52,604 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:52,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 18:15:52,605 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:52,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:52,605 INFO L82 PathProgramCache]: Analyzing trace with hash -2094315683, now seen corresponding path program 1 times [2021-06-05 18:15:52,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:52,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593916766] [2021-06-05 18:15:52,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:52,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:52,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:15:52,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:52,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593916766] [2021-06-05 18:15:52,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593916766] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:15:52,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:15:52,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 18:15:52,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380394262] [2021-06-05 18:15:52,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 18:15:52,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:52,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 18:15:52,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 18:15:52,685 INFO L87 Difference]: Start difference. First operand 942 states and 2548 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:52,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:52,752 INFO L93 Difference]: Finished difference Result 1194 states and 3180 transitions. [2021-06-05 18:15:52,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 18:15:52,753 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 18:15:52,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:52,757 INFO L225 Difference]: With dead ends: 1194 [2021-06-05 18:15:52,757 INFO L226 Difference]: Without dead ends: 942 [2021-06-05 18:15:52,758 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 18:15:52,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-06-05 18:15:52,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 800. [2021-06-05 18:15:52,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.728410513141427) internal successors, (2180), 799 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:52,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2180 transitions. [2021-06-05 18:15:52,776 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2180 transitions. Word has length 36 [2021-06-05 18:15:52,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:52,777 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2180 transitions. [2021-06-05 18:15:52,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:52,777 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2180 transitions. [2021-06-05 18:15:52,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 18:15:52,779 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:52,779 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:52,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 18:15:52,779 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:52,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:52,779 INFO L82 PathProgramCache]: Analyzing trace with hash 2058414913, now seen corresponding path program 1 times [2021-06-05 18:15:52,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:52,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212071813] [2021-06-05 18:15:52,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:52,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:52,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:15:52,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:52,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212071813] [2021-06-05 18:15:52,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212071813] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:15:52,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:15:52,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 18:15:52,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112384188] [2021-06-05 18:15:52,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 18:15:52,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:52,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 18:15:52,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 18:15:52,891 INFO L87 Difference]: Start difference. First operand 800 states and 2180 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:52,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:52,994 INFO L93 Difference]: Finished difference Result 1302 states and 3436 transitions. [2021-06-05 18:15:52,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 18:15:52,995 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 18:15:52,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:52,998 INFO L225 Difference]: With dead ends: 1302 [2021-06-05 18:15:52,998 INFO L226 Difference]: Without dead ends: 920 [2021-06-05 18:15:52,999 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:15:53,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-06-05 18:15:53,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 864. [2021-06-05 18:15:53,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.6882966396292005) internal successors, (2320), 863 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:53,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2320 transitions. [2021-06-05 18:15:53,017 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2320 transitions. Word has length 36 [2021-06-05 18:15:53,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:53,017 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2320 transitions. [2021-06-05 18:15:53,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:53,017 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2320 transitions. [2021-06-05 18:15:53,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 18:15:53,020 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:53,020 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:53,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 18:15:53,020 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:53,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:53,021 INFO L82 PathProgramCache]: Analyzing trace with hash 93608864, now seen corresponding path program 1 times [2021-06-05 18:15:53,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:53,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378309392] [2021-06-05 18:15:53,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:53,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:53,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:15:53,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:53,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378309392] [2021-06-05 18:15:53,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378309392] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:15:53,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:15:53,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 18:15:53,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004741425] [2021-06-05 18:15:53,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 18:15:53,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:53,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 18:15:53,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 18:15:53,119 INFO L87 Difference]: Start difference. First operand 864 states and 2320 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:53,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:53,235 INFO L93 Difference]: Finished difference Result 1304 states and 3456 transitions. [2021-06-05 18:15:53,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 18:15:53,235 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 18:15:53,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:53,241 INFO L225 Difference]: With dead ends: 1304 [2021-06-05 18:15:53,241 INFO L226 Difference]: Without dead ends: 1044 [2021-06-05 18:15:53,245 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:15:53,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-06-05 18:15:53,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 876. [2021-06-05 18:15:53,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.7062857142857144) internal successors, (2368), 875 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:53,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2368 transitions. [2021-06-05 18:15:53,262 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2368 transitions. Word has length 40 [2021-06-05 18:15:53,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:53,263 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2368 transitions. [2021-06-05 18:15:53,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:53,263 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2368 transitions. [2021-06-05 18:15:53,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 18:15:53,265 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:53,265 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:53,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 18:15:53,265 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:53,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:53,266 INFO L82 PathProgramCache]: Analyzing trace with hash -466628886, now seen corresponding path program 2 times [2021-06-05 18:15:53,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:53,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512085816] [2021-06-05 18:15:53,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:53,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:15:53,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:53,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512085816] [2021-06-05 18:15:53,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512085816] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:15:53,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:15:53,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 18:15:53,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262836389] [2021-06-05 18:15:53,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 18:15:53,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:53,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 18:15:53,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 18:15:53,340 INFO L87 Difference]: Start difference. First operand 876 states and 2368 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:53,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:53,430 INFO L93 Difference]: Finished difference Result 1772 states and 4744 transitions. [2021-06-05 18:15:53,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 18:15:53,430 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 18:15:53,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:53,435 INFO L225 Difference]: With dead ends: 1772 [2021-06-05 18:15:53,435 INFO L226 Difference]: Without dead ends: 1505 [2021-06-05 18:15:53,436 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:15:53,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-06-05 18:15:53,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 975. [2021-06-05 18:15:53,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 2.6981519507186857) internal successors, (2628), 974 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:53,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2628 transitions. [2021-06-05 18:15:53,457 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2628 transitions. Word has length 40 [2021-06-05 18:15:53,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:53,457 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 2628 transitions. [2021-06-05 18:15:53,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:53,457 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2628 transitions. [2021-06-05 18:15:53,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 18:15:53,458 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:53,458 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:53,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 18:15:53,458 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:53,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:53,459 INFO L82 PathProgramCache]: Analyzing trace with hash -78750066, now seen corresponding path program 3 times [2021-06-05 18:15:53,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:53,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278067381] [2021-06-05 18:15:53,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:53,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:53,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:15:53,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:53,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278067381] [2021-06-05 18:15:53,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278067381] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:15:53,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:15:53,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 18:15:53,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289711646] [2021-06-05 18:15:53,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 18:15:53,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:53,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 18:15:53,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 18:15:53,508 INFO L87 Difference]: Start difference. First operand 975 states and 2628 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:53,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:53,588 INFO L93 Difference]: Finished difference Result 2211 states and 5878 transitions. [2021-06-05 18:15:53,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 18:15:53,588 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 18:15:53,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:53,595 INFO L225 Difference]: With dead ends: 2211 [2021-06-05 18:15:53,595 INFO L226 Difference]: Without dead ends: 1944 [2021-06-05 18:15:53,595 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:15:53,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-06-05 18:15:53,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1127. [2021-06-05 18:15:53,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1126 states have (on average 2.769982238010657) internal successors, (3119), 1126 states have internal predecessors, (3119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:53,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3119 transitions. [2021-06-05 18:15:53,621 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3119 transitions. Word has length 40 [2021-06-05 18:15:53,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:53,621 INFO L482 AbstractCegarLoop]: Abstraction has 1127 states and 3119 transitions. [2021-06-05 18:15:53,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:53,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3119 transitions. [2021-06-05 18:15:53,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 18:15:53,623 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:53,623 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:53,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 18:15:53,623 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:53,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:53,623 INFO L82 PathProgramCache]: Analyzing trace with hash -56406816, now seen corresponding path program 4 times [2021-06-05 18:15:53,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:53,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20720127] [2021-06-05 18:15:53,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:53,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:53,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:15:53,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:53,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20720127] [2021-06-05 18:15:53,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20720127] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:15:53,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:15:53,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 18:15:53,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366982668] [2021-06-05 18:15:53,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 18:15:53,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:53,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 18:15:53,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 18:15:53,674 INFO L87 Difference]: Start difference. First operand 1127 states and 3119 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:53,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:53,814 INFO L93 Difference]: Finished difference Result 1519 states and 4031 transitions. [2021-06-05 18:15:53,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 18:15:53,815 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 18:15:53,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:53,819 INFO L225 Difference]: With dead ends: 1519 [2021-06-05 18:15:53,820 INFO L226 Difference]: Without dead ends: 1138 [2021-06-05 18:15:53,820 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:15:53,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-06-05 18:15:53,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1033. [2021-06-05 18:15:53,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 2.73546511627907) internal successors, (2823), 1032 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:53,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2823 transitions. [2021-06-05 18:15:53,843 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2823 transitions. Word has length 40 [2021-06-05 18:15:53,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:53,844 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 2823 transitions. [2021-06-05 18:15:53,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:53,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2823 transitions. [2021-06-05 18:15:53,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 18:15:53,845 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:53,845 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:53,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 18:15:53,846 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:53,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:53,846 INFO L82 PathProgramCache]: Analyzing trace with hash -709715269, now seen corresponding path program 1 times [2021-06-05 18:15:53,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:53,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459859978] [2021-06-05 18:15:53,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:53,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:15:53,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:53,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459859978] [2021-06-05 18:15:53,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459859978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:53,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870083981] [2021-06-05 18:15:53,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:54,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:54,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 18:15:54,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:15:54,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870083981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:54,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:54,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 18:15:54,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729241389] [2021-06-05 18:15:54,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 18:15:54,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:54,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 18:15:54,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:15:54,242 INFO L87 Difference]: Start difference. First operand 1033 states and 2823 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:54,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:54,374 INFO L93 Difference]: Finished difference Result 1451 states and 3787 transitions. [2021-06-05 18:15:54,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 18:15:54,374 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 18:15:54,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:54,379 INFO L225 Difference]: With dead ends: 1451 [2021-06-05 18:15:54,379 INFO L226 Difference]: Without dead ends: 1181 [2021-06-05 18:15:54,380 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:15:54,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-06-05 18:15:54,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1083. [2021-06-05 18:15:54,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 1082 states have (on average 2.7060998151571165) internal successors, (2928), 1082 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:54,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 2928 transitions. [2021-06-05 18:15:54,409 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 2928 transitions. Word has length 45 [2021-06-05 18:15:54,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:54,410 INFO L482 AbstractCegarLoop]: Abstraction has 1083 states and 2928 transitions. [2021-06-05 18:15:54,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:54,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 2928 transitions. [2021-06-05 18:15:54,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 18:15:54,414 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:54,414 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:54,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-06-05 18:15:54,629 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:54,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:54,629 INFO L82 PathProgramCache]: Analyzing trace with hash -321836449, now seen corresponding path program 2 times [2021-06-05 18:15:54,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:54,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228867627] [2021-06-05 18:15:54,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:54,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:54,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:15:54,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:54,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228867627] [2021-06-05 18:15:54,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228867627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:54,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766436670] [2021-06-05 18:15:54,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:54,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:15:54,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:54,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 18:15:54,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:54,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:15:54,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766436670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:54,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:54,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 18:15:54,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287112042] [2021-06-05 18:15:54,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 18:15:54,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:54,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 18:15:54,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 18:15:54,834 INFO L87 Difference]: Start difference. First operand 1083 states and 2928 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:54,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:54,941 INFO L93 Difference]: Finished difference Result 2333 states and 6191 transitions. [2021-06-05 18:15:54,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 18:15:54,942 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 18:15:54,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:54,948 INFO L225 Difference]: With dead ends: 2333 [2021-06-05 18:15:54,948 INFO L226 Difference]: Without dead ends: 2063 [2021-06-05 18:15:54,949 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:15:54,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-06-05 18:15:54,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1218. [2021-06-05 18:15:54,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 2.7666392769104355) internal successors, (3367), 1217 states have internal predecessors, (3367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:54,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 3367 transitions. [2021-06-05 18:15:54,977 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 3367 transitions. Word has length 45 [2021-06-05 18:15:54,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:54,977 INFO L482 AbstractCegarLoop]: Abstraction has 1218 states and 3367 transitions. [2021-06-05 18:15:54,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:54,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 3367 transitions. [2021-06-05 18:15:54,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 18:15:54,979 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:54,979 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:55,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:55,197 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:55,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:55,197 INFO L82 PathProgramCache]: Analyzing trace with hash -299493199, now seen corresponding path program 3 times [2021-06-05 18:15:55,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:55,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670945846] [2021-06-05 18:15:55,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:55,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:55,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:15:55,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:55,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670945846] [2021-06-05 18:15:55,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670945846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:55,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168189178] [2021-06-05 18:15:55,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:55,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 18:15:55,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:55,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 18:15:55,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:55,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:15:55,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168189178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:55,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:55,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 18:15:55,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313080806] [2021-06-05 18:15:55,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 18:15:55,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:55,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 18:15:55,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:15:55,398 INFO L87 Difference]: Start difference. First operand 1218 states and 3367 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:55,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:55,598 INFO L93 Difference]: Finished difference Result 2121 states and 5621 transitions. [2021-06-05 18:15:55,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 18:15:55,599 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 18:15:55,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:55,604 INFO L225 Difference]: With dead ends: 2121 [2021-06-05 18:15:55,604 INFO L226 Difference]: Without dead ends: 1546 [2021-06-05 18:15:55,604 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 156.9ms TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:15:55,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2021-06-05 18:15:55,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1253. [2021-06-05 18:15:55,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1252 states have (on average 2.7619808306709266) internal successors, (3458), 1252 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:55,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 3458 transitions. [2021-06-05 18:15:55,625 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 3458 transitions. Word has length 45 [2021-06-05 18:15:55,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:55,625 INFO L482 AbstractCegarLoop]: Abstraction has 1253 states and 3458 transitions. [2021-06-05 18:15:55,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:55,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 3458 transitions. [2021-06-05 18:15:55,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 18:15:55,627 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:55,627 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:55,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 18:15:55,841 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:55,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:55,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1574579510, now seen corresponding path program 1 times [2021-06-05 18:15:55,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:55,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95593221] [2021-06-05 18:15:55,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:55,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:15:55,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:55,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95593221] [2021-06-05 18:15:55,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95593221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:55,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961033320] [2021-06-05 18:15:55,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:55,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 18:15:55,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:56,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:15:56,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961033320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:56,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:56,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 18:15:56,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506759103] [2021-06-05 18:15:56,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 18:15:56,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:56,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 18:15:56,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:15:56,072 INFO L87 Difference]: Start difference. First operand 1253 states and 3458 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:56,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:56,189 INFO L93 Difference]: Finished difference Result 2398 states and 6444 transitions. [2021-06-05 18:15:56,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 18:15:56,189 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 18:15:56,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:56,195 INFO L225 Difference]: With dead ends: 2398 [2021-06-05 18:15:56,195 INFO L226 Difference]: Without dead ends: 1926 [2021-06-05 18:15:56,196 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 96.7ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:15:56,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-06-05 18:15:56,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1456. [2021-06-05 18:15:56,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 2.727835051546392) internal successors, (3969), 1455 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:56,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 3969 transitions. [2021-06-05 18:15:56,222 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 3969 transitions. Word has length 45 [2021-06-05 18:15:56,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:56,222 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 3969 transitions. [2021-06-05 18:15:56,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:56,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 3969 transitions. [2021-06-05 18:15:56,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:15:56,224 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:56,224 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:56,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:56,437 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:56,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:56,437 INFO L82 PathProgramCache]: Analyzing trace with hash -767959508, now seen corresponding path program 1 times [2021-06-05 18:15:56,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:56,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132392792] [2021-06-05 18:15:56,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:56,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:56,504 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:15:56,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:56,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132392792] [2021-06-05 18:15:56,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132392792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:56,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857479989] [2021-06-05 18:15:56,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:56,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:56,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 18:15:56,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:56,698 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:15:56,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857479989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:56,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:56,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 18:15:56,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183768217] [2021-06-05 18:15:56,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:15:56,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:56,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:15:56,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:15:56,701 INFO L87 Difference]: Start difference. First operand 1456 states and 3969 transitions. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:56,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:56,873 INFO L93 Difference]: Finished difference Result 1866 states and 4917 transitions. [2021-06-05 18:15:56,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 18:15:56,873 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 18:15:56,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:56,878 INFO L225 Difference]: With dead ends: 1866 [2021-06-05 18:15:56,878 INFO L226 Difference]: Without dead ends: 1596 [2021-06-05 18:15:56,878 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 153.7ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:15:56,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-06-05 18:15:56,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1531. [2021-06-05 18:15:56,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 2.6921568627450982) internal successors, (4119), 1530 states have internal predecessors, (4119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:56,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 4119 transitions. [2021-06-05 18:15:56,902 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 4119 transitions. Word has length 55 [2021-06-05 18:15:56,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:56,902 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 4119 transitions. [2021-06-05 18:15:56,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:56,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 4119 transitions. [2021-06-05 18:15:56,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:15:56,909 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:56,909 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:57,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 18:15:57,127 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:57,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:57,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1043607760, now seen corresponding path program 2 times [2021-06-05 18:15:57,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:57,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835062760] [2021-06-05 18:15:57,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:57,201 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:15:57,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:57,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835062760] [2021-06-05 18:15:57,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835062760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:57,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464503345] [2021-06-05 18:15:57,201 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:57,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:15:57,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:57,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 18:15:57,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:57,376 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:15:57,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464503345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:57,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:57,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 18:15:57,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701585447] [2021-06-05 18:15:57,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 18:15:57,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:57,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 18:15:57,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 18:15:57,378 INFO L87 Difference]: Start difference. First operand 1531 states and 4119 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:57,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:57,521 INFO L93 Difference]: Finished difference Result 1981 states and 5147 transitions. [2021-06-05 18:15:57,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 18:15:57,521 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 18:15:57,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:57,536 INFO L225 Difference]: With dead ends: 1981 [2021-06-05 18:15:57,537 INFO L226 Difference]: Without dead ends: 1711 [2021-06-05 18:15:57,537 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 114.5ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:15:57,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2021-06-05 18:15:57,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1531. [2021-06-05 18:15:57,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 2.6921568627450982) internal successors, (4119), 1530 states have internal predecessors, (4119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:57,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 4119 transitions. [2021-06-05 18:15:57,564 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 4119 transitions. Word has length 55 [2021-06-05 18:15:57,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:57,565 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 4119 transitions. [2021-06-05 18:15:57,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:57,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 4119 transitions. [2021-06-05 18:15:57,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:15:57,567 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:57,567 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:57,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:57,785 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:57,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:57,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1473361344, now seen corresponding path program 3 times [2021-06-05 18:15:57,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:57,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304892635] [2021-06-05 18:15:57,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:57,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:57,858 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:15:57,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:57,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304892635] [2021-06-05 18:15:57,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304892635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:57,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268239586] [2021-06-05 18:15:57,859 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:57,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 18:15:57,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:57,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 18:15:57,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:57,998 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:15:57,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268239586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:57,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:57,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 18:15:57,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064590128] [2021-06-05 18:15:57,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:15:57,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:57,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:15:57,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:15:57,999 INFO L87 Difference]: Start difference. First operand 1531 states and 4119 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:58,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:58,254 INFO L93 Difference]: Finished difference Result 2669 states and 6993 transitions. [2021-06-05 18:15:58,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:15:58,255 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 18:15:58,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:58,258 INFO L225 Difference]: With dead ends: 2669 [2021-06-05 18:15:58,258 INFO L226 Difference]: Without dead ends: 2046 [2021-06-05 18:15:58,259 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 205.1ms TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:15:58,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-06-05 18:15:58,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1561. [2021-06-05 18:15:58,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 2.7205128205128206) internal successors, (4244), 1560 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:58,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 4244 transitions. [2021-06-05 18:15:58,282 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 4244 transitions. Word has length 55 [2021-06-05 18:15:58,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:58,282 INFO L482 AbstractCegarLoop]: Abstraction has 1561 states and 4244 transitions. [2021-06-05 18:15:58,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:58,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 4244 transitions. [2021-06-05 18:15:58,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:15:58,284 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:58,284 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:58,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 18:15:58,497 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:58,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:58,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1415627214, now seen corresponding path program 4 times [2021-06-05 18:15:58,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:58,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590591983] [2021-06-05 18:15:58,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:58,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:58,693 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:15:58,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:58,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590591983] [2021-06-05 18:15:58,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590591983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:58,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553158914] [2021-06-05 18:15:58,693 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:58,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:15:58,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:58,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 18:15:58,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:58,829 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:15:58,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553158914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:58,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:58,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 18:15:58,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461574832] [2021-06-05 18:15:58,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 18:15:58,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:58,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 18:15:58,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 18:15:58,830 INFO L87 Difference]: Start difference. First operand 1561 states and 4244 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:59,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:59,008 INFO L93 Difference]: Finished difference Result 2878 states and 7671 transitions. [2021-06-05 18:15:59,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 18:15:59,009 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 18:15:59,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:59,013 INFO L225 Difference]: With dead ends: 2878 [2021-06-05 18:15:59,013 INFO L226 Difference]: Without dead ends: 2608 [2021-06-05 18:15:59,013 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 214.4ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:15:59,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-06-05 18:15:59,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 1741. [2021-06-05 18:15:59,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1740 states have (on average 2.760344827586207) internal successors, (4803), 1740 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 18:15:59,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 4803 transitions. [2021-06-05 18:15:59,043 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 4803 transitions. Word has length 55 [2021-06-05 18:15:59,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:59,043 INFO L482 AbstractCegarLoop]: Abstraction has 1741 states and 4803 transitions. [2021-06-05 18:15:59,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:59,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 4803 transitions. [2021-06-05 18:15:59,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:15:59,045 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:59,045 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:59,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 18:15:59,264 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:59,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:59,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1437970464, now seen corresponding path program 5 times [2021-06-05 18:15:59,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:59,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630576929] [2021-06-05 18:15:59,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:59,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:59,322 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:15:59,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:59,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630576929] [2021-06-05 18:15:59,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630576929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:59,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783101493] [2021-06-05 18:15:59,323 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:59,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 18:15:59,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:59,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 18:15:59,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:59,461 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:15:59,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783101493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:59,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:59,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 18:15:59,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013056976] [2021-06-05 18:15:59,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:15:59,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:59,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:15:59,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:15:59,462 INFO L87 Difference]: Start difference. First operand 1741 states and 4803 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:59,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:59,737 INFO L93 Difference]: Finished difference Result 2821 states and 7531 transitions. [2021-06-05 18:15:59,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:15:59,738 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 18:15:59,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:59,741 INFO L225 Difference]: With dead ends: 2821 [2021-06-05 18:15:59,741 INFO L226 Difference]: Without dead ends: 2246 [2021-06-05 18:15:59,742 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 235.0ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:15:59,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2021-06-05 18:15:59,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 1656. [2021-06-05 18:15:59,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 2.730513595166163) internal successors, (4519), 1655 states have internal predecessors, (4519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:59,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 4519 transitions. [2021-06-05 18:15:59,772 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 4519 transitions. Word has length 55 [2021-06-05 18:15:59,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:59,772 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 4519 transitions. [2021-06-05 18:15:59,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:59,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 4519 transitions. [2021-06-05 18:15:59,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:15:59,774 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:59,774 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:59,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 18:15:59,989 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:59,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:59,990 INFO L82 PathProgramCache]: Analyzing trace with hash 978716506, now seen corresponding path program 6 times [2021-06-05 18:15:59,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:59,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723043803] [2021-06-05 18:15:59,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:59,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:00,065 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:16:00,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:00,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723043803] [2021-06-05 18:16:00,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723043803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:00,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298672351] [2021-06-05 18:16:00,065 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:00,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 18:16:00,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:00,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 18:16:00,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:00,245 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:16:00,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298672351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:00,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:00,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 18:16:00,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696098550] [2021-06-05 18:16:00,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:16:00,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:00,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:16:00,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:16:00,246 INFO L87 Difference]: Start difference. First operand 1656 states and 4519 transitions. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:00,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:00,393 INFO L93 Difference]: Finished difference Result 2561 states and 6649 transitions. [2021-06-05 18:16:00,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 18:16:00,393 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 18:16:00,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:00,396 INFO L225 Difference]: With dead ends: 2561 [2021-06-05 18:16:00,397 INFO L226 Difference]: Without dead ends: 2212 [2021-06-05 18:16:00,397 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 154.1ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:16:00,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-06-05 18:16:00,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1658. [2021-06-05 18:16:00,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 2.7296318648159326) internal successors, (4523), 1657 states have internal predecessors, (4523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:00,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 4523 transitions. [2021-06-05 18:16:00,419 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 4523 transitions. Word has length 55 [2021-06-05 18:16:00,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:00,419 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 4523 transitions. [2021-06-05 18:16:00,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:00,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 4523 transitions. [2021-06-05 18:16:00,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:16:00,421 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:00,421 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:00,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 18:16:00,633 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:00,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:00,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1071233846, now seen corresponding path program 7 times [2021-06-05 18:16:00,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:00,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965008716] [2021-06-05 18:16:00,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:00,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:00,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:16:00,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:00,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965008716] [2021-06-05 18:16:00,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965008716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:00,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355090153] [2021-06-05 18:16:00,684 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:00,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:00,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 18:16:00,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:00,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:16:00,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355090153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:00,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:00,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 18:16:00,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413574327] [2021-06-05 18:16:00,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 18:16:00,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:00,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 18:16:00,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:16:00,809 INFO L87 Difference]: Start difference. First operand 1658 states and 4523 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 18:16:00,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:00,890 INFO L93 Difference]: Finished difference Result 2311 states and 5957 transitions. [2021-06-05 18:16:00,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 18:16:00,891 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 55 [2021-06-05 18:16:00,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:00,894 INFO L225 Difference]: With dead ends: 2311 [2021-06-05 18:16:00,894 INFO L226 Difference]: Without dead ends: 2026 [2021-06-05 18:16:00,894 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:16:00,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2021-06-05 18:16:00,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 1638. [2021-06-05 18:16:00,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 2.7385461209529627) internal successors, (4483), 1637 states have internal predecessors, (4483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:00,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 4483 transitions. [2021-06-05 18:16:00,920 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 4483 transitions. Word has length 55 [2021-06-05 18:16:00,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:00,920 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 4483 transitions. [2021-06-05 18:16:00,920 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 18:16:00,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 4483 transitions. [2021-06-05 18:16:00,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:16:00,922 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:00,922 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:01,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:01,137 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:01,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:01,137 INFO L82 PathProgramCache]: Analyzing trace with hash 2040122438, now seen corresponding path program 8 times [2021-06-05 18:16:01,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:01,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981606524] [2021-06-05 18:16:01,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:01,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:01,183 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:16:01,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:01,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981606524] [2021-06-05 18:16:01,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981606524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:01,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965415396] [2021-06-05 18:16:01,184 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:01,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:16:01,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:01,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 18:16:01,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:01,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:16:01,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965415396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:01,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:01,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 18:16:01,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104781806] [2021-06-05 18:16:01,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 18:16:01,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:01,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 18:16:01,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 18:16:01,332 INFO L87 Difference]: Start difference. First operand 1638 states and 4483 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:01,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:01,491 INFO L93 Difference]: Finished difference Result 2246 states and 5827 transitions. [2021-06-05 18:16:01,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 18:16:01,491 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 18:16:01,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:01,498 INFO L225 Difference]: With dead ends: 2246 [2021-06-05 18:16:01,498 INFO L226 Difference]: Without dead ends: 1961 [2021-06-05 18:16:01,498 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 139.7ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:16:01,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-06-05 18:16:01,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1613. [2021-06-05 18:16:01,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1612 states have (on average 2.75) internal successors, (4433), 1612 states have internal predecessors, (4433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:01,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 4433 transitions. [2021-06-05 18:16:01,518 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 4433 transitions. Word has length 55 [2021-06-05 18:16:01,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:01,518 INFO L482 AbstractCegarLoop]: Abstraction has 1613 states and 4433 transitions. [2021-06-05 18:16:01,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:01,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 4433 transitions. [2021-06-05 18:16:01,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:16:01,520 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:01,520 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:01,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:01,733 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:01,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:01,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1871308552, now seen corresponding path program 9 times [2021-06-05 18:16:01,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:01,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596292960] [2021-06-05 18:16:01,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:01,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:01,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:16:01,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:01,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596292960] [2021-06-05 18:16:01,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596292960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:01,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81659329] [2021-06-05 18:16:01,776 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:01,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 18:16:01,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:01,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 18:16:01,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:01,922 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:16:01,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81659329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:01,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:01,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 18:16:01,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664329600] [2021-06-05 18:16:01,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 18:16:01,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:01,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 18:16:01,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:16:01,923 INFO L87 Difference]: Start difference. First operand 1613 states and 4433 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 18:16:02,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:02,038 INFO L93 Difference]: Finished difference Result 3193 states and 8511 transitions. [2021-06-05 18:16:02,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 18:16:02,038 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 55 [2021-06-05 18:16:02,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:02,042 INFO L225 Difference]: With dead ends: 3193 [2021-06-05 18:16:02,043 INFO L226 Difference]: Without dead ends: 2893 [2021-06-05 18:16:02,043 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:16:02,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2893 states. [2021-06-05 18:16:02,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2893 to 1853. [2021-06-05 18:16:02,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1853 states, 1852 states have (on average 2.8115550755939527) internal successors, (5207), 1852 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 18:16:02,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1853 states to 1853 states and 5207 transitions. [2021-06-05 18:16:02,074 INFO L78 Accepts]: Start accepts. Automaton has 1853 states and 5207 transitions. Word has length 55 [2021-06-05 18:16:02,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:02,074 INFO L482 AbstractCegarLoop]: Abstraction has 1853 states and 5207 transitions. [2021-06-05 18:16:02,074 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 18:16:02,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1853 states and 5207 transitions. [2021-06-05 18:16:02,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:16:02,076 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:02,076 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:02,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 18:16:02,294 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:02,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:02,295 INFO L82 PathProgramCache]: Analyzing trace with hash -809510425, now seen corresponding path program 10 times [2021-06-05 18:16:02,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:02,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728704600] [2021-06-05 18:16:02,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:02,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:02,361 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:02,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:02,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728704600] [2021-06-05 18:16:02,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728704600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:02,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100670833] [2021-06-05 18:16:02,362 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:02,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:16:02,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:02,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 18:16:02,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:02,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100670833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:02,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:02,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 18:16:02,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967044216] [2021-06-05 18:16:02,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:16:02,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:02,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:16:02,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:16:02,512 INFO L87 Difference]: Start difference. First operand 1853 states and 5207 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:02,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:02,719 INFO L93 Difference]: Finished difference Result 3208 states and 8677 transitions. [2021-06-05 18:16:02,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:16:02,719 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 18:16:02,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:02,723 INFO L225 Difference]: With dead ends: 3208 [2021-06-05 18:16:02,723 INFO L226 Difference]: Without dead ends: 2426 [2021-06-05 18:16:02,724 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 161.7ms TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:16:02,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-06-05 18:16:02,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 1856. [2021-06-05 18:16:02,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1855 states have (on average 2.7326145552560646) internal successors, (5069), 1855 states have internal predecessors, (5069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:02,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 5069 transitions. [2021-06-05 18:16:02,747 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 5069 transitions. Word has length 55 [2021-06-05 18:16:02,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:02,747 INFO L482 AbstractCegarLoop]: Abstraction has 1856 states and 5069 transitions. [2021-06-05 18:16:02,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:02,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 5069 transitions. [2021-06-05 18:16:02,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:16:02,749 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:02,749 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:02,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:02,965 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:02,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:02,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1514387363, now seen corresponding path program 11 times [2021-06-05 18:16:02,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:02,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884332040] [2021-06-05 18:16:02,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:02,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:03,065 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:03,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:03,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884332040] [2021-06-05 18:16:03,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884332040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:03,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395406550] [2021-06-05 18:16:03,066 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:03,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 18:16:03,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:03,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:16:03,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:03,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395406550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:03,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:03,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 18:16:03,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036811709] [2021-06-05 18:16:03,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:16:03,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:03,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:16:03,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:16:03,223 INFO L87 Difference]: Start difference. First operand 1856 states and 5069 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:03,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:03,428 INFO L93 Difference]: Finished difference Result 2316 states and 6117 transitions. [2021-06-05 18:16:03,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 18:16:03,429 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 18:16:03,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:03,432 INFO L225 Difference]: With dead ends: 2316 [2021-06-05 18:16:03,432 INFO L226 Difference]: Without dead ends: 2046 [2021-06-05 18:16:03,432 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 156.4ms TimeCoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:16:03,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-06-05 18:16:03,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1931. [2021-06-05 18:16:03,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.704145077720207) internal successors, (5219), 1930 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:03,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-06-05 18:16:03,454 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-06-05 18:16:03,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:03,455 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-06-05 18:16:03,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:03,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-06-05 18:16:03,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:16:03,457 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:03,457 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:03,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 18:16:03,669 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:03,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:03,669 INFO L82 PathProgramCache]: Analyzing trace with hash -2063950335, now seen corresponding path program 12 times [2021-06-05 18:16:03,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:03,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66436650] [2021-06-05 18:16:03,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:03,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:03,738 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:03,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:03,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66436650] [2021-06-05 18:16:03,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66436650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:03,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533367844] [2021-06-05 18:16:03,739 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:03,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 18:16:03,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:03,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:16:03,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:03,882 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:03,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533367844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:03,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:03,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 18:16:03,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790725801] [2021-06-05 18:16:03,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:16:03,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:03,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:16:03,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:16:03,883 INFO L87 Difference]: Start difference. First operand 1931 states and 5219 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:04,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:04,052 INFO L93 Difference]: Finished difference Result 2481 states and 6447 transitions. [2021-06-05 18:16:04,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:16:04,052 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 18:16:04,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:04,055 INFO L225 Difference]: With dead ends: 2481 [2021-06-05 18:16:04,056 INFO L226 Difference]: Without dead ends: 2211 [2021-06-05 18:16:04,056 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 143.7ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:16:04,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-06-05 18:16:04,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 1931. [2021-06-05 18:16:04,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.704145077720207) internal successors, (5219), 1930 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:04,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-06-05 18:16:04,080 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-06-05 18:16:04,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:04,080 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-06-05 18:16:04,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:04,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-06-05 18:16:04,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:16:04,083 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:04,083 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:04,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:04,297 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:04,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:04,297 INFO L82 PathProgramCache]: Analyzing trace with hash -2132101391, now seen corresponding path program 13 times [2021-06-05 18:16:04,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:04,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366049936] [2021-06-05 18:16:04,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:04,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:04,369 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:04,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:04,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366049936] [2021-06-05 18:16:04,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366049936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:04,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116815399] [2021-06-05 18:16:04,369 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:04,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:04,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:16:04,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:04,529 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:04,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116815399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:04,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:04,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 18:16:04,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160226087] [2021-06-05 18:16:04,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:16:04,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:04,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:16:04,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:16:04,530 INFO L87 Difference]: Start difference. First operand 1931 states and 5219 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:04,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:04,757 INFO L93 Difference]: Finished difference Result 2566 states and 6617 transitions. [2021-06-05 18:16:04,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:16:04,757 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 18:16:04,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:04,760 INFO L225 Difference]: With dead ends: 2566 [2021-06-05 18:16:04,760 INFO L226 Difference]: Without dead ends: 2296 [2021-06-05 18:16:04,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 206.4ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:16:04,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-06-05 18:16:04,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1931. [2021-06-05 18:16:04,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.704145077720207) internal successors, (5219), 1930 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:04,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-06-05 18:16:04,782 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-06-05 18:16:04,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:04,782 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-06-05 18:16:04,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:04,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-06-05 18:16:04,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:16:04,784 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:04,784 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:04,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 18:16:04,997 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:04,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:04,997 INFO L82 PathProgramCache]: Analyzing trace with hash 865896831, now seen corresponding path program 14 times [2021-06-05 18:16:04,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:04,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292668219] [2021-06-05 18:16:04,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:05,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:05,079 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:05,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:05,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292668219] [2021-06-05 18:16:05,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292668219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:05,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272572069] [2021-06-05 18:16:05,080 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:05,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:16:05,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:05,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:16:05,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:05,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272572069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:05,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:05,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 18:16:05,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349327039] [2021-06-05 18:16:05,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:16:05,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:05,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:16:05,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:16:05,290 INFO L87 Difference]: Start difference. First operand 1931 states and 5219 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:05,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:05,494 INFO L93 Difference]: Finished difference Result 2496 states and 6477 transitions. [2021-06-05 18:16:05,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:16:05,495 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 18:16:05,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:05,497 INFO L225 Difference]: With dead ends: 2496 [2021-06-05 18:16:05,497 INFO L226 Difference]: Without dead ends: 2226 [2021-06-05 18:16:05,498 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 166.3ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:16:05,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-06-05 18:16:05,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1931. [2021-06-05 18:16:05,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.704145077720207) internal successors, (5219), 1930 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:05,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-06-05 18:16:05,520 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-06-05 18:16:05,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:05,520 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-06-05 18:16:05,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:05,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-06-05 18:16:05,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:16:05,522 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:05,522 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:05,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 18:16:05,741 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:05,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:05,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1295650415, now seen corresponding path program 15 times [2021-06-05 18:16:05,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:05,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030935533] [2021-06-05 18:16:05,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:05,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:05,812 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:05,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:05,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030935533] [2021-06-05 18:16:05,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030935533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:05,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088167206] [2021-06-05 18:16:05,812 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:05,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 18:16:05,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:05,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:16:05,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:05,952 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:05,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088167206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:05,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:05,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 18:16:05,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17142146] [2021-06-05 18:16:05,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:16:05,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:05,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:16:05,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:16:05,954 INFO L87 Difference]: Start difference. First operand 1931 states and 5219 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:06,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:06,241 INFO L93 Difference]: Finished difference Result 3074 states and 8103 transitions. [2021-06-05 18:16:06,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:16:06,241 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 18:16:06,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:06,243 INFO L225 Difference]: With dead ends: 3074 [2021-06-05 18:16:06,243 INFO L226 Difference]: Without dead ends: 2451 [2021-06-05 18:16:06,244 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 236.0ms TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:16:06,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-06-05 18:16:06,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1961. [2021-06-05 18:16:06,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1960 states have (on average 2.726530612244898) internal successors, (5344), 1960 states have internal predecessors, (5344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:06,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 5344 transitions. [2021-06-05 18:16:06,268 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 5344 transitions. Word has length 65 [2021-06-05 18:16:06,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:06,268 INFO L482 AbstractCegarLoop]: Abstraction has 1961 states and 5344 transitions. [2021-06-05 18:16:06,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:06,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 5344 transitions. [2021-06-05 18:16:06,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:16:06,270 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:06,270 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:06,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 18:16:06,485 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:06,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:06,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1237916285, now seen corresponding path program 16 times [2021-06-05 18:16:06,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:06,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18154701] [2021-06-05 18:16:06,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:06,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:06,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:06,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18154701] [2021-06-05 18:16:06,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18154701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:06,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144777575] [2021-06-05 18:16:06,551 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:06,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:16:06,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:06,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:16:06,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:06,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144777575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:06,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:06,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 18:16:06,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956279652] [2021-06-05 18:16:06,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:16:06,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:06,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:16:06,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:16:06,691 INFO L87 Difference]: Start difference. First operand 1961 states and 5344 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:06,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:06,964 INFO L93 Difference]: Finished difference Result 3278 states and 8771 transitions. [2021-06-05 18:16:06,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:16:06,964 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 18:16:06,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:06,967 INFO L225 Difference]: With dead ends: 3278 [2021-06-05 18:16:06,967 INFO L226 Difference]: Without dead ends: 3008 [2021-06-05 18:16:06,968 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 224.5ms TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:16:06,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-06-05 18:16:06,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 2141. [2021-06-05 18:16:07,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2141 states, 2140 states have (on average 2.758411214953271) internal successors, (5903), 2140 states have internal predecessors, (5903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:07,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2141 states to 2141 states and 5903 transitions. [2021-06-05 18:16:07,004 INFO L78 Accepts]: Start accepts. Automaton has 2141 states and 5903 transitions. Word has length 65 [2021-06-05 18:16:07,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:07,004 INFO L482 AbstractCegarLoop]: Abstraction has 2141 states and 5903 transitions. [2021-06-05 18:16:07,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:07,004 INFO L276 IsEmpty]: Start isEmpty. Operand 2141 states and 5903 transitions. [2021-06-05 18:16:07,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:16:07,006 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:07,006 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:07,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 18:16:07,221 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:07,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:07,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1260259535, now seen corresponding path program 17 times [2021-06-05 18:16:07,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:07,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808695759] [2021-06-05 18:16:07,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:07,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:07,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:07,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808695759] [2021-06-05 18:16:07,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808695759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:07,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436326894] [2021-06-05 18:16:07,289 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:07,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 18:16:07,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:07,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:16:07,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:07,449 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:07,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436326894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:07,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:07,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 18:16:07,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250442511] [2021-06-05 18:16:07,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:16:07,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:07,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:16:07,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:16:07,452 INFO L87 Difference]: Start difference. First operand 2141 states and 5903 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:07,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:07,743 INFO L93 Difference]: Finished difference Result 3221 states and 8631 transitions. [2021-06-05 18:16:07,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:16:07,744 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 18:16:07,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:07,747 INFO L225 Difference]: With dead ends: 3221 [2021-06-05 18:16:07,747 INFO L226 Difference]: Without dead ends: 2646 [2021-06-05 18:16:07,747 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 254.9ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:16:07,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-06-05 18:16:07,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2056. [2021-06-05 18:16:07,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2056 states, 2055 states have (on average 2.7343065693430657) internal successors, (5619), 2055 states have internal predecessors, (5619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:07,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 5619 transitions. [2021-06-05 18:16:07,772 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 5619 transitions. Word has length 65 [2021-06-05 18:16:07,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:07,772 INFO L482 AbstractCegarLoop]: Abstraction has 2056 states and 5619 transitions. [2021-06-05 18:16:07,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:07,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 5619 transitions. [2021-06-05 18:16:07,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:16:07,774 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:07,774 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:07,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:07,981 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:07,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:07,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1366107511, now seen corresponding path program 18 times [2021-06-05 18:16:07,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:07,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238058143] [2021-06-05 18:16:07,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:07,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:08,057 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:16:08,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:08,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238058143] [2021-06-05 18:16:08,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238058143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:08,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134370676] [2021-06-05 18:16:08,058 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:08,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 18:16:08,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:08,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:16:08,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:08,247 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:16:08,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134370676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:08,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:08,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-05 18:16:08,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012365007] [2021-06-05 18:16:08,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:16:08,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:08,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:16:08,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:16:08,248 INFO L87 Difference]: Start difference. First operand 2056 states and 5619 transitions. Second operand has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:08,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:08,442 INFO L93 Difference]: Finished difference Result 3061 states and 7949 transitions. [2021-06-05 18:16:08,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:16:08,443 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 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 65 [2021-06-05 18:16:08,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:08,445 INFO L225 Difference]: With dead ends: 3061 [2021-06-05 18:16:08,446 INFO L226 Difference]: Without dead ends: 2712 [2021-06-05 18:16:08,446 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 172.9ms TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:16:08,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-06-05 18:16:08,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2058. [2021-06-05 18:16:08,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2058 states, 2057 states have (on average 2.733592610597958) internal successors, (5623), 2057 states have internal predecessors, (5623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:08,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 5623 transitions. [2021-06-05 18:16:08,469 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 5623 transitions. Word has length 65 [2021-06-05 18:16:08,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:08,470 INFO L482 AbstractCegarLoop]: Abstraction has 2058 states and 5623 transitions. [2021-06-05 18:16:08,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:08,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 5623 transitions. [2021-06-05 18:16:08,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:16:08,472 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:08,472 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:08,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:08,685 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:08,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:08,685 INFO L82 PathProgramCache]: Analyzing trace with hash -908301467, now seen corresponding path program 19 times [2021-06-05 18:16:08,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:08,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713651255] [2021-06-05 18:16:08,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:08,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:08,750 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:16:08,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:08,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713651255] [2021-06-05 18:16:08,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713651255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:08,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034078448] [2021-06-05 18:16:08,751 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:08,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:16:08,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:08,910 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:16:08,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034078448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:08,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:08,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 18:16:08,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179160589] [2021-06-05 18:16:08,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:16:08,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:08,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:16:08,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:16:08,912 INFO L87 Difference]: Start difference. First operand 2058 states and 5623 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:09,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:09,024 INFO L93 Difference]: Finished difference Result 2861 states and 7357 transitions. [2021-06-05 18:16:09,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 18:16:09,024 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 18:16:09,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:09,027 INFO L225 Difference]: With dead ends: 2861 [2021-06-05 18:16:09,027 INFO L226 Difference]: Without dead ends: 2576 [2021-06-05 18:16:09,027 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 103.8ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:16:09,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2021-06-05 18:16:09,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 2038. [2021-06-05 18:16:09,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2038 states, 2037 states have (on average 2.74079528718704) internal successors, (5583), 2037 states have internal predecessors, (5583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:09,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2038 states to 2038 states and 5583 transitions. [2021-06-05 18:16:09,054 INFO L78 Accepts]: Start accepts. Automaton has 2038 states and 5583 transitions. Word has length 65 [2021-06-05 18:16:09,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:09,054 INFO L482 AbstractCegarLoop]: Abstraction has 2038 states and 5583 transitions. [2021-06-05 18:16:09,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:09,054 INFO L276 IsEmpty]: Start isEmpty. Operand 2038 states and 5583 transitions. [2021-06-05 18:16:09,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:16:09,056 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:09,056 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:09,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 18:16:09,273 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:09,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:09,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1371957365, now seen corresponding path program 20 times [2021-06-05 18:16:09,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:09,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733063629] [2021-06-05 18:16:09,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:09,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:09,344 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:16:09,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:09,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733063629] [2021-06-05 18:16:09,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733063629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:09,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53606006] [2021-06-05 18:16:09,345 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:09,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:16:09,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:09,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:16:09,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:09,487 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:16:09,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53606006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:09,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:09,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 18:16:09,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935173181] [2021-06-05 18:16:09,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:16:09,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:09,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:16:09,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:16:09,489 INFO L87 Difference]: Start difference. First operand 2038 states and 5583 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:09,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:09,648 INFO L93 Difference]: Finished difference Result 2796 states and 7227 transitions. [2021-06-05 18:16:09,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:16:09,648 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 18:16:09,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:09,651 INFO L225 Difference]: With dead ends: 2796 [2021-06-05 18:16:09,651 INFO L226 Difference]: Without dead ends: 2511 [2021-06-05 18:16:09,652 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 146.6ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:16:09,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2021-06-05 18:16:09,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2013. [2021-06-05 18:16:09,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2013 states, 2012 states have (on average 2.75) internal successors, (5533), 2012 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:09,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2013 states to 2013 states and 5533 transitions. [2021-06-05 18:16:09,676 INFO L78 Accepts]: Start accepts. Automaton has 2013 states and 5533 transitions. Word has length 65 [2021-06-05 18:16:09,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:09,676 INFO L482 AbstractCegarLoop]: Abstraction has 2013 states and 5533 transitions. [2021-06-05 18:16:09,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:09,676 INFO L276 IsEmpty]: Start isEmpty. Operand 2013 states and 5533 transitions. [2021-06-05 18:16:09,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:16:09,678 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:09,678 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:09,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:09,895 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:09,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:09,896 INFO L82 PathProgramCache]: Analyzing trace with hash -239599961, now seen corresponding path program 21 times [2021-06-05 18:16:09,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:09,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521164965] [2021-06-05 18:16:09,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:09,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:16:09,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:09,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521164965] [2021-06-05 18:16:09,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521164965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:09,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937035162] [2021-06-05 18:16:09,948 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:10,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 18:16:10,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:10,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:16:10,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:10,097 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:16:10,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937035162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:10,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:10,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 18:16:10,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688072476] [2021-06-05 18:16:10,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:16:10,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:10,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:16:10,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:16:10,099 INFO L87 Difference]: Start difference. First operand 2013 states and 5533 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:10,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:10,239 INFO L93 Difference]: Finished difference Result 2721 states and 7077 transitions. [2021-06-05 18:16:10,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 18:16:10,240 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 18:16:10,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:10,243 INFO L225 Difference]: With dead ends: 2721 [2021-06-05 18:16:10,243 INFO L226 Difference]: Without dead ends: 2436 [2021-06-05 18:16:10,244 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 119.0ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:16:10,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-06-05 18:16:10,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 1988. [2021-06-05 18:16:10,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 2.7594363361852037) internal successors, (5483), 1987 states have internal predecessors, (5483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:10,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 5483 transitions. [2021-06-05 18:16:10,267 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 5483 transitions. Word has length 65 [2021-06-05 18:16:10,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:10,267 INFO L482 AbstractCegarLoop]: Abstraction has 1988 states and 5483 transitions. [2021-06-05 18:16:10,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:10,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 5483 transitions. [2021-06-05 18:16:10,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:16:10,269 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:10,269 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:10,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 18:16:10,485 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:10,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:10,485 INFO L82 PathProgramCache]: Analyzing trace with hash 729288631, now seen corresponding path program 22 times [2021-06-05 18:16:10,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:10,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768626718] [2021-06-05 18:16:10,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:10,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:10,548 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:16:10,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:10,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768626718] [2021-06-05 18:16:10,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768626718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:10,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230695924] [2021-06-05 18:16:10,549 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:10,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:16:10,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:10,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:16:10,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:10,694 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:16:10,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230695924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:10,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:10,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 18:16:10,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794178592] [2021-06-05 18:16:10,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:16:10,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:10,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:16:10,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:16:10,695 INFO L87 Difference]: Start difference. First operand 1988 states and 5483 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:10,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:10,933 INFO L93 Difference]: Finished difference Result 2646 states and 6927 transitions. [2021-06-05 18:16:10,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:16:10,934 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 18:16:10,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:10,936 INFO L225 Difference]: With dead ends: 2646 [2021-06-05 18:16:10,936 INFO L226 Difference]: Without dead ends: 2361 [2021-06-05 18:16:10,936 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 196.4ms TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:16:10,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-06-05 18:16:10,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 1963. [2021-06-05 18:16:10,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 2.7691131498470947) internal successors, (5433), 1962 states have internal predecessors, (5433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:10,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 5433 transitions. [2021-06-05 18:16:10,958 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 5433 transitions. Word has length 65 [2021-06-05 18:16:10,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:10,958 INFO L482 AbstractCegarLoop]: Abstraction has 1963 states and 5433 transitions. [2021-06-05 18:16:10,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:10,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 5433 transitions. [2021-06-05 18:16:10,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:16:10,960 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:10,960 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:11,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 18:16:11,165 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:11,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:11,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1112824937, now seen corresponding path program 23 times [2021-06-05 18:16:11,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:11,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396079901] [2021-06-05 18:16:11,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:11,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:11,223 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:16:11,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:11,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396079901] [2021-06-05 18:16:11,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396079901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:11,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289765634] [2021-06-05 18:16:11,224 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:11,277 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 18:16:11,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:11,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:16:11,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:11,356 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:16:11,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289765634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:11,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:11,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 18:16:11,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414805536] [2021-06-05 18:16:11,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:16:11,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:11,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:16:11,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:16:11,357 INFO L87 Difference]: Start difference. First operand 1963 states and 5433 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:11,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:11,534 INFO L93 Difference]: Finished difference Result 3593 states and 9611 transitions. [2021-06-05 18:16:11,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 18:16:11,534 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 18:16:11,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:11,537 INFO L225 Difference]: With dead ends: 3593 [2021-06-05 18:16:11,537 INFO L226 Difference]: Without dead ends: 3293 [2021-06-05 18:16:11,537 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 139.1ms TimeCoverageRelationStatistics Valid=164, Invalid=436, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:16:11,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3293 states. [2021-06-05 18:16:11,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3293 to 2203. [2021-06-05 18:16:11,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2202 states have (on average 2.818801089918256) internal successors, (6207), 2202 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 18:16:11,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 6207 transitions. [2021-06-05 18:16:11,565 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 6207 transitions. Word has length 65 [2021-06-05 18:16:11,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:11,565 INFO L482 AbstractCegarLoop]: Abstraction has 2203 states and 6207 transitions. [2021-06-05 18:16:11,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:11,565 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 6207 transitions. [2021-06-05 18:16:11,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:16:11,567 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:11,567 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:11,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 18:16:11,785 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:11,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:11,785 INFO L82 PathProgramCache]: Analyzing trace with hash -2120344232, now seen corresponding path program 24 times [2021-06-05 18:16:11,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:11,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364500099] [2021-06-05 18:16:11,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:11,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:11,845 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:11,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:11,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364500099] [2021-06-05 18:16:11,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364500099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:11,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913271579] [2021-06-05 18:16:11,845 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:11,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 18:16:11,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:11,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:16:11,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:11,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913271579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:11,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:11,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 18:16:11,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136892868] [2021-06-05 18:16:12,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:16:12,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:12,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:16:12,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:16:12,001 INFO L87 Difference]: Start difference. First operand 2203 states and 6207 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:12,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:12,232 INFO L93 Difference]: Finished difference Result 2975 states and 8086 transitions. [2021-06-05 18:16:12,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 18:16:12,233 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 18:16:12,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:12,235 INFO L225 Difference]: With dead ends: 2975 [2021-06-05 18:16:12,235 INFO L226 Difference]: Without dead ends: 2396 [2021-06-05 18:16:12,235 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 194.6ms TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:16:12,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2021-06-05 18:16:12,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 2028. [2021-06-05 18:16:12,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.8036507153428714) internal successors, (5683), 2027 states have internal predecessors, (5683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:12,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5683 transitions. [2021-06-05 18:16:12,257 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5683 transitions. Word has length 65 [2021-06-05 18:16:12,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:12,257 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5683 transitions. [2021-06-05 18:16:12,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:12,257 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5683 transitions. [2021-06-05 18:16:12,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:16:12,259 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:12,259 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:12,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 18:16:12,459 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:12,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:12,460 INFO L82 PathProgramCache]: Analyzing trace with hash 632250685, now seen corresponding path program 25 times [2021-06-05 18:16:12,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:12,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412357995] [2021-06-05 18:16:12,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:12,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:12,544 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:12,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:12,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412357995] [2021-06-05 18:16:12,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412357995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:12,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377216918] [2021-06-05 18:16:12,544 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:12,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:12,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:16:12,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:12,746 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:12,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377216918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:12,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:12,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2021-06-05 18:16:12,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699469376] [2021-06-05 18:16:12,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:16:12,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:12,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:16:12,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:16:12,748 INFO L87 Difference]: Start difference. First operand 2028 states and 5683 transitions. Second operand has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:12,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:12,952 INFO L93 Difference]: Finished difference Result 2868 states and 7683 transitions. [2021-06-05 18:16:12,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:16:12,952 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-05 18:16:12,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:12,955 INFO L225 Difference]: With dead ends: 2868 [2021-06-05 18:16:12,955 INFO L226 Difference]: Without dead ends: 2534 [2021-06-05 18:16:12,955 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 204.3ms TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:16:12,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-06-05 18:16:12,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 2113. [2021-06-05 18:16:12,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 2.7713068181818183) internal successors, (5853), 2112 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:12,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 5853 transitions. [2021-06-05 18:16:12,976 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 5853 transitions. Word has length 70 [2021-06-05 18:16:12,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:12,977 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 5853 transitions. [2021-06-05 18:16:12,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:12,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 5853 transitions. [2021-06-05 18:16:12,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:16:12,979 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:12,979 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:13,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 18:16:13,181 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:13,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:13,181 INFO L82 PathProgramCache]: Analyzing trace with hash -515245599, now seen corresponding path program 26 times [2021-06-05 18:16:13,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:13,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344848756] [2021-06-05 18:16:13,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:13,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:13,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344848756] [2021-06-05 18:16:13,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344848756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:13,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057191640] [2021-06-05 18:16:13,267 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:13,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:16:13,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:13,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:16:13,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:13,425 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:13,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057191640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:13,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:13,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 18:16:13,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772271193] [2021-06-05 18:16:13,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:16:13,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:13,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:16:13,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:16:13,427 INFO L87 Difference]: Start difference. First operand 2113 states and 5853 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:13,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:13,567 INFO L93 Difference]: Finished difference Result 3061 states and 7877 transitions. [2021-06-05 18:16:13,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 18:16:13,567 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-05 18:16:13,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:13,570 INFO L225 Difference]: With dead ends: 3061 [2021-06-05 18:16:13,570 INFO L226 Difference]: Without dead ends: 2791 [2021-06-05 18:16:13,571 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 144.8ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:16:13,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-06-05 18:16:13,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 2128. [2021-06-05 18:16:13,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.765867418899859) internal successors, (5883), 2127 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:13,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-06-05 18:16:13,599 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-06-05 18:16:13,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:13,599 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-06-05 18:16:13,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:13,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-06-05 18:16:13,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:16:13,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:13,601 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:13,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:13,813 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:13,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:13,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1201428783, now seen corresponding path program 27 times [2021-06-05 18:16:13,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:13,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245136330] [2021-06-05 18:16:13,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:13,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:13,898 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:13,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:13,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245136330] [2021-06-05 18:16:13,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245136330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:13,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22711986] [2021-06-05 18:16:13,898 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:13,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 18:16:13,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:13,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:16:13,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:14,060 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:14,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22711986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:14,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:14,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 18:16:14,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111780087] [2021-06-05 18:16:14,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:16:14,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:14,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:16:14,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:16:14,061 INFO L87 Difference]: Start difference. First operand 2128 states and 5883 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:14,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:14,259 INFO L93 Difference]: Finished difference Result 2946 states and 7647 transitions. [2021-06-05 18:16:14,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:16:14,259 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-05 18:16:14,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:14,262 INFO L225 Difference]: With dead ends: 2946 [2021-06-05 18:16:14,262 INFO L226 Difference]: Without dead ends: 2676 [2021-06-05 18:16:14,262 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 197.1ms TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:16:14,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2021-06-05 18:16:14,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 2128. [2021-06-05 18:16:14,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.765867418899859) internal successors, (5883), 2127 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:14,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-06-05 18:16:14,284 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-06-05 18:16:14,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:14,284 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-06-05 18:16:14,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:14,284 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-06-05 18:16:14,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:16:14,286 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:14,286 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:14,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:14,501 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:14,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:14,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1286463521, now seen corresponding path program 28 times [2021-06-05 18:16:14,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:14,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945142511] [2021-06-05 18:16:14,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:14,575 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:14,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:14,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945142511] [2021-06-05 18:16:14,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945142511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:14,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639320862] [2021-06-05 18:16:14,576 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:14,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:16:14,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:14,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:16:14,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:14,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639320862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:14,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:14,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 18:16:14,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713263796] [2021-06-05 18:16:14,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:16:14,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:14,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:16:14,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:16:14,747 INFO L87 Difference]: Start difference. First operand 2128 states and 5883 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:14,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:14,921 INFO L93 Difference]: Finished difference Result 2921 states and 7597 transitions. [2021-06-05 18:16:14,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 18:16:14,921 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-05 18:16:14,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:14,924 INFO L225 Difference]: With dead ends: 2921 [2021-06-05 18:16:14,924 INFO L226 Difference]: Without dead ends: 2651 [2021-06-05 18:16:14,924 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 165.5ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:16:14,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2021-06-05 18:16:14,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2128. [2021-06-05 18:16:14,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.765867418899859) internal successors, (5883), 2127 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:14,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-06-05 18:16:14,946 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-06-05 18:16:14,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:14,946 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-06-05 18:16:14,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:14,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-06-05 18:16:14,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:16:14,949 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:14,949 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:15,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 18:16:15,149 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:15,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:15,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1354614577, now seen corresponding path program 29 times [2021-06-05 18:16:15,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:15,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083627455] [2021-06-05 18:16:15,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:15,219 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:15,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:15,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083627455] [2021-06-05 18:16:15,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083627455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:15,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076313313] [2021-06-05 18:16:15,220 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:15,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 18:16:15,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:15,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:16:15,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:15,366 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:15,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076313313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:15,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:15,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 18:16:15,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265109344] [2021-06-05 18:16:15,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:16:15,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:15,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:16:15,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:16:15,368 INFO L87 Difference]: Start difference. First operand 2128 states and 5883 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:15,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:15,639 INFO L93 Difference]: Finished difference Result 2871 states and 7497 transitions. [2021-06-05 18:16:15,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:16:15,639 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-05 18:16:15,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:15,642 INFO L225 Difference]: With dead ends: 2871 [2021-06-05 18:16:15,642 INFO L226 Difference]: Without dead ends: 2601 [2021-06-05 18:16:15,642 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 231.9ms TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:16:15,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-06-05 18:16:15,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2128. [2021-06-05 18:16:15,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.765867418899859) internal successors, (5883), 2127 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:15,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-06-05 18:16:15,665 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-06-05 18:16:15,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:15,665 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-06-05 18:16:15,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:15,665 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-06-05 18:16:15,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:16:15,667 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:15,667 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:15,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:15,881 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:15,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:15,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1643383645, now seen corresponding path program 30 times [2021-06-05 18:16:15,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:15,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33061373] [2021-06-05 18:16:15,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:15,960 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:15,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:15,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33061373] [2021-06-05 18:16:15,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33061373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:15,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041977719] [2021-06-05 18:16:15,960 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:16,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 18:16:16,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:16,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:16:16,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:16,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041977719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:16,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:16,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 18:16:16,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815950767] [2021-06-05 18:16:16,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:16:16,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:16,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:16:16,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:16:16,101 INFO L87 Difference]: Start difference. First operand 2128 states and 5883 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:16,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:16,299 INFO L93 Difference]: Finished difference Result 2821 states and 7397 transitions. [2021-06-05 18:16:16,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:16:16,299 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-05 18:16:16,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:16,301 INFO L225 Difference]: With dead ends: 2821 [2021-06-05 18:16:16,301 INFO L226 Difference]: Without dead ends: 2551 [2021-06-05 18:16:16,302 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 177.1ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:16:16,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2551 states. [2021-06-05 18:16:16,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2551 to 2128. [2021-06-05 18:16:16,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.765867418899859) internal successors, (5883), 2127 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:16,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-06-05 18:16:16,323 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-06-05 18:16:16,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:16,323 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-06-05 18:16:16,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:16,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-06-05 18:16:16,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:16:16,325 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:16,325 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:16,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 18:16:16,538 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:16,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:16,538 INFO L82 PathProgramCache]: Analyzing trace with hash 2073137229, now seen corresponding path program 31 times [2021-06-05 18:16:16,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:16,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244497655] [2021-06-05 18:16:16,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:16,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:16,641 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:16,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:16,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244497655] [2021-06-05 18:16:16,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244497655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:16,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896012975] [2021-06-05 18:16:16,642 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:16,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:16:16,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:16,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896012975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:16,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:16,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 18:16:16,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990199405] [2021-06-05 18:16:16,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:16:16,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:16,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:16:16,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:16:16,818 INFO L87 Difference]: Start difference. First operand 2128 states and 5883 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:17,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:17,147 INFO L93 Difference]: Finished difference Result 2831 states and 7447 transitions. [2021-06-05 18:16:17,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:16:17,147 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-05 18:16:17,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:17,150 INFO L225 Difference]: With dead ends: 2831 [2021-06-05 18:16:17,150 INFO L226 Difference]: Without dead ends: 2561 [2021-06-05 18:16:17,150 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 302.3ms TimeCoverageRelationStatistics Valid=267, Invalid=789, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:16:17,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2561 states. [2021-06-05 18:16:17,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2561 to 2128. [2021-06-05 18:16:17,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.768218147625764) internal successors, (5888), 2127 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:17,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5888 transitions. [2021-06-05 18:16:17,174 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5888 transitions. Word has length 70 [2021-06-05 18:16:17,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:17,174 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5888 transitions. [2021-06-05 18:16:17,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:17,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5888 transitions. [2021-06-05 18:16:17,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:16:17,176 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:17,176 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:17,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:17,377 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:17,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:17,377 INFO L82 PathProgramCache]: Analyzing trace with hash 2015403099, now seen corresponding path program 32 times [2021-06-05 18:16:17,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:17,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877333118] [2021-06-05 18:16:17,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:17,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:17,453 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:17,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:17,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877333118] [2021-06-05 18:16:17,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877333118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:17,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974613743] [2021-06-05 18:16:17,453 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:17,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:16:17,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:17,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:16:17,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:17,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974613743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:17,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:17,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 18:16:17,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725763008] [2021-06-05 18:16:17,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:16:17,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:17,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:16:17,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:16:17,602 INFO L87 Difference]: Start difference. First operand 2128 states and 5888 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:17,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:17,827 INFO L93 Difference]: Finished difference Result 3598 states and 9621 transitions. [2021-06-05 18:16:17,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:16:17,828 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-05 18:16:17,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:17,831 INFO L225 Difference]: With dead ends: 3598 [2021-06-05 18:16:17,831 INFO L226 Difference]: Without dead ends: 3328 [2021-06-05 18:16:17,832 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 191.9ms TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:16:17,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2021-06-05 18:16:17,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 2308. [2021-06-05 18:16:17,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2308 states, 2307 states have (on average 2.7945383615084527) internal successors, (6447), 2307 states have internal predecessors, (6447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:17,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2308 states to 2308 states and 6447 transitions. [2021-06-05 18:16:17,863 INFO L78 Accepts]: Start accepts. Automaton has 2308 states and 6447 transitions. Word has length 70 [2021-06-05 18:16:17,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:17,863 INFO L482 AbstractCegarLoop]: Abstraction has 2308 states and 6447 transitions. [2021-06-05 18:16:17,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:17,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2308 states and 6447 transitions. [2021-06-05 18:16:17,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:16:17,866 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:17,866 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:18,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 18:16:18,081 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:18,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:18,081 INFO L82 PathProgramCache]: Analyzing trace with hash 2037746349, now seen corresponding path program 33 times [2021-06-05 18:16:18,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:18,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980376677] [2021-06-05 18:16:18,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:18,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:18,168 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:18,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:18,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980376677] [2021-06-05 18:16:18,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980376677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:18,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633525594] [2021-06-05 18:16:18,169 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:18,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 18:16:18,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:18,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:16:18,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:18,317 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:18,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633525594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:18,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:18,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 18:16:18,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254561764] [2021-06-05 18:16:18,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:16:18,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:18,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:16:18,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:16:18,318 INFO L87 Difference]: Start difference. First operand 2308 states and 6447 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:18,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:18,690 INFO L93 Difference]: Finished difference Result 3421 states and 9121 transitions. [2021-06-05 18:16:18,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:16:18,690 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-05 18:16:18,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:18,693 INFO L225 Difference]: With dead ends: 3421 [2021-06-05 18:16:18,693 INFO L226 Difference]: Without dead ends: 2846 [2021-06-05 18:16:18,694 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 321.5ms TimeCoverageRelationStatistics Valid=357, Invalid=1049, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:16:18,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2021-06-05 18:16:18,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 1803. [2021-06-05 18:16:18,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1802 states have (on average 2.7291897891231964) internal successors, (4918), 1802 states have internal predecessors, (4918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:18,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 4918 transitions. [2021-06-05 18:16:18,715 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 4918 transitions. Word has length 70 [2021-06-05 18:16:18,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:18,715 INFO L482 AbstractCegarLoop]: Abstraction has 1803 states and 4918 transitions. [2021-06-05 18:16:18,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:18,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 4918 transitions. [2021-06-05 18:16:18,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:16:18,717 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:18,717 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:18,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 18:16:18,929 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:18,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:18,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1814233586, now seen corresponding path program 34 times [2021-06-05 18:16:18,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:18,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021765129] [2021-06-05 18:16:18,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:19,031 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:19,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:19,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021765129] [2021-06-05 18:16:19,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021765129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:19,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525943002] [2021-06-05 18:16:19,032 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:19,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:16:19,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:19,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:16:19,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:19,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525943002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:19,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:19,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 18:16:19,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748950316] [2021-06-05 18:16:19,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:16:19,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:19,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:16:19,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:16:19,176 INFO L87 Difference]: Start difference. First operand 1803 states and 4918 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:19,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:19,364 INFO L93 Difference]: Finished difference Result 2621 states and 6757 transitions. [2021-06-05 18:16:19,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:16:19,364 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-05 18:16:19,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:19,366 INFO L225 Difference]: With dead ends: 2621 [2021-06-05 18:16:19,367 INFO L226 Difference]: Without dead ends: 2351 [2021-06-05 18:16:19,367 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 179.5ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:16:19,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-06-05 18:16:19,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1878. [2021-06-05 18:16:19,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1877 states have (on average 2.7400106553010124) internal successors, (5143), 1877 states have internal predecessors, (5143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:19,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 5143 transitions. [2021-06-05 18:16:19,387 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 5143 transitions. Word has length 75 [2021-06-05 18:16:19,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:19,387 INFO L482 AbstractCegarLoop]: Abstraction has 1878 states and 5143 transitions. [2021-06-05 18:16:19,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:19,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 5143 transitions. [2021-06-05 18:16:19,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:16:19,388 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:19,389 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:19,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 18:16:19,589 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:19,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:19,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1128050402, now seen corresponding path program 35 times [2021-06-05 18:16:19,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:19,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970955029] [2021-06-05 18:16:19,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:19,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:19,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:19,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970955029] [2021-06-05 18:16:19,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970955029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:19,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706034719] [2021-06-05 18:16:19,675 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:19,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 18:16:19,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:19,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:16:19,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:19,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706034719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:19,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:19,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 18:16:19,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399599729] [2021-06-05 18:16:19,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:16:19,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:19,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:16:19,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:16:19,844 INFO L87 Difference]: Start difference. First operand 1878 states and 5143 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:20,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:20,084 INFO L93 Difference]: Finished difference Result 2841 states and 7272 transitions. [2021-06-05 18:16:20,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:16:20,084 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-05 18:16:20,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:20,087 INFO L225 Difference]: With dead ends: 2841 [2021-06-05 18:16:20,087 INFO L226 Difference]: Without dead ends: 2571 [2021-06-05 18:16:20,087 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 225.4ms TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:16:20,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-06-05 18:16:20,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 1953. [2021-06-05 18:16:20,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 2.75) internal successors, (5368), 1952 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:20,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 5368 transitions. [2021-06-05 18:16:20,108 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 5368 transitions. Word has length 75 [2021-06-05 18:16:20,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:20,108 INFO L482 AbstractCegarLoop]: Abstraction has 1953 states and 5368 transitions. [2021-06-05 18:16:20,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:20,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 5368 transitions. [2021-06-05 18:16:20,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:16:20,110 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:20,110 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:20,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 18:16:20,312 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:20,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:20,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1043015664, now seen corresponding path program 36 times [2021-06-05 18:16:20,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:20,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265665560] [2021-06-05 18:16:20,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:20,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:20,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265665560] [2021-06-05 18:16:20,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265665560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:20,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728457919] [2021-06-05 18:16:20,444 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:20,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 18:16:20,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:20,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:16:20,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:20,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728457919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:20,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:20,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 18:16:20,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893998924] [2021-06-05 18:16:20,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:16:20,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:20,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:16:20,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:16:20,597 INFO L87 Difference]: Start difference. First operand 1953 states and 5368 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:20,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:20,809 INFO L93 Difference]: Finished difference Result 2871 states and 7407 transitions. [2021-06-05 18:16:20,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:16:20,809 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-05 18:16:20,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:20,812 INFO L225 Difference]: With dead ends: 2871 [2021-06-05 18:16:20,812 INFO L226 Difference]: Without dead ends: 2601 [2021-06-05 18:16:20,812 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 221.7ms TimeCoverageRelationStatistics Valid=248, Invalid=744, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:16:20,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-06-05 18:16:20,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2028. [2021-06-05 18:16:20,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.759250123334978) internal successors, (5593), 2027 states have internal predecessors, (5593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:20,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5593 transitions. [2021-06-05 18:16:20,834 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5593 transitions. Word has length 75 [2021-06-05 18:16:20,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:20,835 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5593 transitions. [2021-06-05 18:16:20,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:20,835 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5593 transitions. [2021-06-05 18:16:20,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:16:20,837 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:20,837 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:21,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:21,041 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:21,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:21,041 INFO L82 PathProgramCache]: Analyzing trace with hash 974864608, now seen corresponding path program 37 times [2021-06-05 18:16:21,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:21,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142334228] [2021-06-05 18:16:21,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:21,124 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:21,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:21,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142334228] [2021-06-05 18:16:21,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142334228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:21,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422759515] [2021-06-05 18:16:21,125 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:21,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:21,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:16:21,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:21,319 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:21,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422759515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:21,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:21,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 18:16:21,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498378531] [2021-06-05 18:16:21,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:16:21,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:21,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:16:21,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:16:21,320 INFO L87 Difference]: Start difference. First operand 2028 states and 5593 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:21,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:21,637 INFO L93 Difference]: Finished difference Result 2896 states and 7532 transitions. [2021-06-05 18:16:21,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:16:21,637 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-05 18:16:21,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:21,640 INFO L225 Difference]: With dead ends: 2896 [2021-06-05 18:16:21,640 INFO L226 Difference]: Without dead ends: 2626 [2021-06-05 18:16:21,641 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 286.6ms TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:16:21,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-06-05 18:16:21,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 2103. [2021-06-05 18:16:21,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2103 states, 2102 states have (on average 2.7678401522359657) internal successors, (5818), 2102 states have internal predecessors, (5818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:21,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 5818 transitions. [2021-06-05 18:16:21,666 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 5818 transitions. Word has length 75 [2021-06-05 18:16:21,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:21,666 INFO L482 AbstractCegarLoop]: Abstraction has 2103 states and 5818 transitions. [2021-06-05 18:16:21,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:21,666 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 5818 transitions. [2021-06-05 18:16:21,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:16:21,671 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:21,671 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:21,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:21,881 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:21,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:21,881 INFO L82 PathProgramCache]: Analyzing trace with hash -322104466, now seen corresponding path program 38 times [2021-06-05 18:16:21,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:21,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214617116] [2021-06-05 18:16:21,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:21,965 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:21,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:21,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214617116] [2021-06-05 18:16:21,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214617116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:21,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086632078] [2021-06-05 18:16:21,965 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:22,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:16:22,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:22,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:16:22,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:22,111 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:22,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086632078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:22,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:22,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 18:16:22,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45581935] [2021-06-05 18:16:22,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:16:22,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:22,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:16:22,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:16:22,113 INFO L87 Difference]: Start difference. First operand 2103 states and 5818 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:22,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:22,396 INFO L93 Difference]: Finished difference Result 2966 states and 7777 transitions. [2021-06-05 18:16:22,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:16:22,396 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-05 18:16:22,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:22,399 INFO L225 Difference]: With dead ends: 2966 [2021-06-05 18:16:22,399 INFO L226 Difference]: Without dead ends: 2696 [2021-06-05 18:16:22,399 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 263.6ms TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:16:22,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-06-05 18:16:22,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2178. [2021-06-05 18:16:22,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2178 states, 2177 states have (on average 2.782728525493799) internal successors, (6058), 2177 states have internal predecessors, (6058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:22,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 6058 transitions. [2021-06-05 18:16:22,424 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 6058 transitions. Word has length 75 [2021-06-05 18:16:22,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:22,424 INFO L482 AbstractCegarLoop]: Abstraction has 2178 states and 6058 transitions. [2021-06-05 18:16:22,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:22,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 6058 transitions. [2021-06-05 18:16:22,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:16:22,426 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:22,426 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:22,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:22,627 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:22,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:22,627 INFO L82 PathProgramCache]: Analyzing trace with hash 107649118, now seen corresponding path program 39 times [2021-06-05 18:16:22,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:22,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114203873] [2021-06-05 18:16:22,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:22,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:22,719 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:22,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:22,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114203873] [2021-06-05 18:16:22,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114203873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:22,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736849270] [2021-06-05 18:16:22,720 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:22,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 18:16:22,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:22,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:16:22,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:22,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736849270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:22,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:22,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 18:16:22,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112819313] [2021-06-05 18:16:22,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:16:22,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:22,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:16:22,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:16:22,904 INFO L87 Difference]: Start difference. First operand 2178 states and 6058 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:23,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:23,268 INFO L93 Difference]: Finished difference Result 3544 states and 9403 transitions. [2021-06-05 18:16:23,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:16:23,268 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-05 18:16:23,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:23,271 INFO L225 Difference]: With dead ends: 3544 [2021-06-05 18:16:23,271 INFO L226 Difference]: Without dead ends: 2921 [2021-06-05 18:16:23,272 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 306.2ms TimeCoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:16:23,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-06-05 18:16:23,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2253. [2021-06-05 18:16:23,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7921847246891653) internal successors, (6288), 2252 states have internal predecessors, (6288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:23,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6288 transitions. [2021-06-05 18:16:23,293 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6288 transitions. Word has length 75 [2021-06-05 18:16:23,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:23,294 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6288 transitions. [2021-06-05 18:16:23,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:23,294 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6288 transitions. [2021-06-05 18:16:23,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:16:23,295 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:23,295 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:23,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:23,496 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:23,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:23,496 INFO L82 PathProgramCache]: Analyzing trace with hash 49914988, now seen corresponding path program 40 times [2021-06-05 18:16:23,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:23,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897148730] [2021-06-05 18:16:23,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:23,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:23,570 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:23,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:23,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897148730] [2021-06-05 18:16:23,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897148730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:23,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468636347] [2021-06-05 18:16:23,570 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:23,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:16:23,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:23,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:16:23,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:23,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468636347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:23,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:23,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 18:16:23,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039406328] [2021-06-05 18:16:23,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:16:23,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:23,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:16:23,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:16:23,733 INFO L87 Difference]: Start difference. First operand 2253 states and 6288 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:24,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:24,027 INFO L93 Difference]: Finished difference Result 3748 states and 10071 transitions. [2021-06-05 18:16:24,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:16:24,028 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-05 18:16:24,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:24,032 INFO L225 Difference]: With dead ends: 3748 [2021-06-05 18:16:24,032 INFO L226 Difference]: Without dead ends: 3478 [2021-06-05 18:16:24,032 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 237.7ms TimeCoverageRelationStatistics Valid=355, Invalid=905, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:16:24,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2021-06-05 18:16:24,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 2433. [2021-06-05 18:16:24,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2433 states, 2432 states have (on average 2.815378289473684) internal successors, (6847), 2432 states have internal predecessors, (6847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:24,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 6847 transitions. [2021-06-05 18:16:24,060 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 6847 transitions. Word has length 75 [2021-06-05 18:16:24,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:24,060 INFO L482 AbstractCegarLoop]: Abstraction has 2433 states and 6847 transitions. [2021-06-05 18:16:24,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:24,060 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 6847 transitions. [2021-06-05 18:16:24,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:16:24,062 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:24,062 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:24,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 18:16:24,263 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:24,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:24,263 INFO L82 PathProgramCache]: Analyzing trace with hash 72258238, now seen corresponding path program 41 times [2021-06-05 18:16:24,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:24,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918292578] [2021-06-05 18:16:24,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:24,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:24,334 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:24,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:24,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918292578] [2021-06-05 18:16:24,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918292578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:24,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747605236] [2021-06-05 18:16:24,334 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:24,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 18:16:24,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:24,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:16:24,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:24,484 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:24,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747605236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:24,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:24,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 18:16:24,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702260273] [2021-06-05 18:16:24,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:16:24,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:24,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:16:24,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:16:24,485 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 18:16:24,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:24,823 INFO L93 Difference]: Finished difference Result 3210 states and 8721 transitions. [2021-06-05 18:16:24,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:16:24,824 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-05 18:16:24,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:24,827 INFO L225 Difference]: With dead ends: 3210 [2021-06-05 18:16:24,827 INFO L226 Difference]: Without dead ends: 2721 [2021-06-05 18:16:24,827 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 301.3ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:16:24,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2021-06-05 18:16:24,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2378. [2021-06-05 18:16:24,849 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 18:16:24,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6683 transitions. [2021-06-05 18:16:24,852 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6683 transitions. Word has length 75 [2021-06-05 18:16:24,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:24,852 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6683 transitions. [2021-06-05 18:16:24,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:24,852 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6683 transitions. [2021-06-05 18:16:24,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:16:24,854 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:24,854 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:25,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:25,054 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:25,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:25,055 INFO L82 PathProgramCache]: Analyzing trace with hash -711333330, now seen corresponding path program 42 times [2021-06-05 18:16:25,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:25,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475758158] [2021-06-05 18:16:25,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:25,159 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:25,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:25,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475758158] [2021-06-05 18:16:25,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475758158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:25,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579074980] [2021-06-05 18:16:25,160 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:25,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 18:16:25,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:25,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:16:25,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:25,358 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:25,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579074980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:25,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:25,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:16:25,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641022114] [2021-06-05 18:16:25,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:16:25,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:25,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:16:25,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:16:25,359 INFO L87 Difference]: Start difference. First operand 2378 states and 6683 transitions. Second operand has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:25,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:25,563 INFO L93 Difference]: Finished difference Result 2948 states and 7951 transitions. [2021-06-05 18:16:25,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:16:25,563 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 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 80 [2021-06-05 18:16:25,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:25,566 INFO L225 Difference]: With dead ends: 2948 [2021-06-05 18:16:25,566 INFO L226 Difference]: Without dead ends: 2678 [2021-06-05 18:16:25,566 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 212.5ms TimeCoverageRelationStatistics Valid=260, Invalid=732, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:16:25,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2678 states. [2021-06-05 18:16:25,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2678 to 2463. [2021-06-05 18:16:25,587 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 18:16:25,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 6853 transitions. [2021-06-05 18:16:25,590 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 6853 transitions. Word has length 80 [2021-06-05 18:16:25,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:25,591 INFO L482 AbstractCegarLoop]: Abstraction has 2463 states and 6853 transitions. [2021-06-05 18:16:25,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:25,591 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 6853 transitions. [2021-06-05 18:16:25,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:16:25,593 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:25,593 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:25,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 18:16:25,794 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:25,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:25,794 INFO L82 PathProgramCache]: Analyzing trace with hash -2057763374, now seen corresponding path program 43 times [2021-06-05 18:16:25,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:25,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516746250] [2021-06-05 18:16:25,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:25,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:25,907 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:25,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:25,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516746250] [2021-06-05 18:16:25,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516746250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:25,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88585858] [2021-06-05 18:16:25,907 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:25,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:16:25,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:26,069 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:26,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88585858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:26,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:26,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 18:16:26,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111391659] [2021-06-05 18:16:26,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:16:26,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:26,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:16:26,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:16:26,070 INFO L87 Difference]: Start difference. First operand 2463 states and 6853 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:26,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:26,240 INFO L93 Difference]: Finished difference Result 3561 states and 9177 transitions. [2021-06-05 18:16:26,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:16:26,241 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 18:16:26,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:26,244 INFO L225 Difference]: With dead ends: 3561 [2021-06-05 18:16:26,244 INFO L226 Difference]: Without dead ends: 3291 [2021-06-05 18:16:26,244 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 180.5ms TimeCoverageRelationStatistics Valid=196, Invalid=560, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:16:26,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3291 states. [2021-06-05 18:16:26,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3291 to 2478. [2021-06-05 18:16:26,267 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 18:16:26,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-05 18:16:26,270 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-05 18:16:26,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:26,270 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-05 18:16:26,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:26,271 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-05 18:16:26,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:16:26,272 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:26,272 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:26,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:26,473 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:26,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:26,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1337149122, now seen corresponding path program 44 times [2021-06-05 18:16:26,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:26,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490393174] [2021-06-05 18:16:26,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:26,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:26,573 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:26,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:26,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490393174] [2021-06-05 18:16:26,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490393174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:26,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486559] [2021-06-05 18:16:26,574 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:26,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:16:26,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:26,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:16:26,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:26,744 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:26,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:26,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:26,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 18:16:26,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653489588] [2021-06-05 18:16:26,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:16:26,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:26,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:16:26,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:16:26,745 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 18:16:26,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:26,975 INFO L93 Difference]: Finished difference Result 3446 states and 8947 transitions. [2021-06-05 18:16:26,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:16:26,976 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 18:16:26,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:26,979 INFO L225 Difference]: With dead ends: 3446 [2021-06-05 18:16:26,979 INFO L226 Difference]: Without dead ends: 3176 [2021-06-05 18:16:26,979 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 234.8ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:16:26,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-06-05 18:16:26,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2478. [2021-06-05 18:16:27,001 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 18:16:27,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-05 18:16:27,004 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-05 18:16:27,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:27,005 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-05 18:16:27,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:27,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-05 18:16:27,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:16:27,006 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:27,007 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:27,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 18:16:27,207 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:27,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:27,208 INFO L82 PathProgramCache]: Analyzing trace with hash 908084816, now seen corresponding path program 45 times [2021-06-05 18:16:27,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:27,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388899903] [2021-06-05 18:16:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:27,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:27,323 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:27,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:27,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388899903] [2021-06-05 18:16:27,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388899903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:27,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057292396] [2021-06-05 18:16:27,323 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:27,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 18:16:27,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:27,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:16:27,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:27,477 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:27,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057292396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:27,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:27,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 18:16:27,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29227671] [2021-06-05 18:16:27,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:16:27,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:27,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:16:27,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:16:27,479 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:27,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:27,679 INFO L93 Difference]: Finished difference Result 3421 states and 8897 transitions. [2021-06-05 18:16:27,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:16:27,680 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 18:16:27,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:27,683 INFO L225 Difference]: With dead ends: 3421 [2021-06-05 18:16:27,683 INFO L226 Difference]: Without dead ends: 3151 [2021-06-05 18:16:27,683 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 192.5ms TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:16:27,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-06-05 18:16:27,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2478. [2021-06-05 18:16:27,705 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 18:16:27,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-05 18:16:27,708 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-05 18:16:27,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:27,708 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-05 18:16:27,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:27,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-05 18:16:27,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:16:27,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:27,710 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:27,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 18:16:27,925 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:27,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:27,925 INFO L82 PathProgramCache]: Analyzing trace with hash 221901632, now seen corresponding path program 46 times [2021-06-05 18:16:27,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:27,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34597361] [2021-06-05 18:16:27,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:27,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:28,030 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:28,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:28,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34597361] [2021-06-05 18:16:28,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34597361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:28,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100825108] [2021-06-05 18:16:28,030 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:28,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:16:28,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:28,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:16:28,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:28,189 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:28,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100825108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:28,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:28,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 18:16:28,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23420849] [2021-06-05 18:16:28,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:16:28,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:28,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:16:28,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:16:28,190 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 18:16:28,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:28,469 INFO L93 Difference]: Finished difference Result 3371 states and 8797 transitions. [2021-06-05 18:16:28,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:16:28,469 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 18:16:28,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:28,472 INFO L225 Difference]: With dead ends: 3371 [2021-06-05 18:16:28,473 INFO L226 Difference]: Without dead ends: 3101 [2021-06-05 18:16:28,473 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 275.7ms TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:16:28,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3101 states. [2021-06-05 18:16:28,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3101 to 2478. [2021-06-05 18:16:28,495 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 18:16:28,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-05 18:16:28,498 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-05 18:16:28,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:28,498 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-05 18:16:28,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:28,498 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-05 18:16:28,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:16:28,500 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:28,500 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:28,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 18:16:28,701 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:28,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:28,701 INFO L82 PathProgramCache]: Analyzing trace with hash 136866894, now seen corresponding path program 47 times [2021-06-05 18:16:28,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:28,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759064571] [2021-06-05 18:16:28,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:28,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:28,783 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:28,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:28,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759064571] [2021-06-05 18:16:28,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759064571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:28,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509334742] [2021-06-05 18:16:28,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:28,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 18:16:28,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:28,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:16:28,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:28,920 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:28,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509334742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:28,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:28,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 18:16:28,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588284947] [2021-06-05 18:16:28,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:16:28,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:28,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:16:28,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:16:28,921 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:29,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:29,144 INFO L93 Difference]: Finished difference Result 3321 states and 8697 transitions. [2021-06-05 18:16:29,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:16:29,145 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 18:16:29,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:29,148 INFO L225 Difference]: With dead ends: 3321 [2021-06-05 18:16:29,148 INFO L226 Difference]: Without dead ends: 3051 [2021-06-05 18:16:29,148 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 196.3ms TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:16:29,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2021-06-05 18:16:29,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 2478. [2021-06-05 18:16:29,170 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 18:16:29,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-05 18:16:29,174 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-05 18:16:29,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:29,174 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-05 18:16:29,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:29,174 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-05 18:16:29,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:16:29,176 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:29,176 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:29,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:29,389 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:29,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:29,389 INFO L82 PathProgramCache]: Analyzing trace with hash 68715838, now seen corresponding path program 48 times [2021-06-05 18:16:29,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:29,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806020679] [2021-06-05 18:16:29,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:29,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:29,478 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:29,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:29,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806020679] [2021-06-05 18:16:29,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806020679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:29,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937984101] [2021-06-05 18:16:29,478 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:29,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 18:16:29,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:29,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:16:29,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:29,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937984101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:29,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:29,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 18:16:29,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600261806] [2021-06-05 18:16:29,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:16:29,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:29,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:16:29,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:16:29,632 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 18:16:29,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:29,976 INFO L93 Difference]: Finished difference Result 3271 states and 8597 transitions. [2021-06-05 18:16:29,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:16:29,976 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 18:16:29,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:29,979 INFO L225 Difference]: With dead ends: 3271 [2021-06-05 18:16:29,979 INFO L226 Difference]: Without dead ends: 3001 [2021-06-05 18:16:29,979 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 310.5ms TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:16:29,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-06-05 18:16:30,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 2478. [2021-06-05 18:16:30,015 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 18:16:30,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-05 18:16:30,018 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-05 18:16:30,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:30,018 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-05 18:16:30,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:30,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-05 18:16:30,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:16:30,020 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:30,020 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:30,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:30,233 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:30,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:30,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1228253236, now seen corresponding path program 49 times [2021-06-05 18:16:30,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:30,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978476025] [2021-06-05 18:16:30,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:30,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:30,311 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:30,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:30,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978476025] [2021-06-05 18:16:30,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978476025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:30,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571095043] [2021-06-05 18:16:30,312 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:30,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:16:30,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:30,492 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:30,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571095043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:30,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:30,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 18:16:30,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499377035] [2021-06-05 18:16:30,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:16:30,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:30,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:16:30,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:16:30,493 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:30,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:30,757 INFO L93 Difference]: Finished difference Result 3221 states and 8497 transitions. [2021-06-05 18:16:30,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:16:30,758 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 18:16:30,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:30,763 INFO L225 Difference]: With dead ends: 3221 [2021-06-05 18:16:30,763 INFO L226 Difference]: Without dead ends: 2951 [2021-06-05 18:16:30,764 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 227.8ms TimeCoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:16:30,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-06-05 18:16:30,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2478. [2021-06-05 18:16:30,787 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 18:16:30,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-05 18:16:30,790 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-05 18:16:30,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:30,790 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-05 18:16:30,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:30,790 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-05 18:16:30,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:16:30,792 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:30,792 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:30,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-05 18:16:30,993 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:30,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:30,993 INFO L82 PathProgramCache]: Analyzing trace with hash -798499652, now seen corresponding path program 50 times [2021-06-05 18:16:30,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:30,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136346466] [2021-06-05 18:16:30,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:31,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:31,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136346466] [2021-06-05 18:16:31,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136346466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:31,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65415105] [2021-06-05 18:16:31,078 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:31,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:16:31,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:31,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:16:31,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:31,242 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:31,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65415105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:31,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:31,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 18:16:31,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544115763] [2021-06-05 18:16:31,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:16:31,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:31,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:16:31,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:16:31,243 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 18:16:31,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:31,654 INFO L93 Difference]: Finished difference Result 3679 states and 9763 transitions. [2021-06-05 18:16:31,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:16:31,654 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 18:16:31,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:31,657 INFO L225 Difference]: With dead ends: 3679 [2021-06-05 18:16:31,657 INFO L226 Difference]: Without dead ends: 3056 [2021-06-05 18:16:31,658 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 355.1ms TimeCoverageRelationStatistics Valid=381, Invalid=1179, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:16:31,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2021-06-05 18:16:31,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 2388. [2021-06-05 18:16:31,682 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 18:16:31,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 6648 transitions. [2021-06-05 18:16:31,685 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 6648 transitions. Word has length 80 [2021-06-05 18:16:31,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:31,685 INFO L482 AbstractCegarLoop]: Abstraction has 2388 states and 6648 transitions. [2021-06-05 18:16:31,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:31,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 6648 transitions. [2021-06-05 18:16:31,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:16:31,687 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:31,687 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:31,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 18:16:31,888 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:31,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:31,888 INFO L82 PathProgramCache]: Analyzing trace with hash -856233782, now seen corresponding path program 51 times [2021-06-05 18:16:31,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:31,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064698942] [2021-06-05 18:16:31,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:31,965 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:31,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:31,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064698942] [2021-06-05 18:16:31,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064698942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:31,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452593002] [2021-06-05 18:16:31,965 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:32,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 18:16:32,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:32,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:16:32,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:32,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452593002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:32,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:32,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 18:16:32,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11763350] [2021-06-05 18:16:32,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:16:32,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:32,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:16:32,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:16:32,118 INFO L87 Difference]: Start difference. First operand 2388 states and 6648 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:32,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:32,436 INFO L93 Difference]: Finished difference Result 3908 states and 10481 transitions. [2021-06-05 18:16:32,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:16:32,437 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 18:16:32,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:32,440 INFO L225 Difference]: With dead ends: 3908 [2021-06-05 18:16:32,440 INFO L226 Difference]: Without dead ends: 3638 [2021-06-05 18:16:32,441 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 268.5ms TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:16:32,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3638 states. [2021-06-05 18:16:32,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3638 to 2568. [2021-06-05 18:16:32,465 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 18:16:32,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 7207 transitions. [2021-06-05 18:16:32,468 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 7207 transitions. Word has length 80 [2021-06-05 18:16:32,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:32,468 INFO L482 AbstractCegarLoop]: Abstraction has 2568 states and 7207 transitions. [2021-06-05 18:16:32,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:32,468 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 7207 transitions. [2021-06-05 18:16:32,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:16:32,470 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:32,470 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:32,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:32,670 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:32,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:32,671 INFO L82 PathProgramCache]: Analyzing trace with hash -833890532, now seen corresponding path program 52 times [2021-06-05 18:16:32,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:32,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414026928] [2021-06-05 18:16:32,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:32,752 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:32,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:32,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414026928] [2021-06-05 18:16:32,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414026928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:32,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977680706] [2021-06-05 18:16:32,752 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:32,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:16:32,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:32,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:16:32,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:32,908 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:32,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977680706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:32,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:32,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 18:16:32,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748720267] [2021-06-05 18:16:32,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:16:32,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:32,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:16:32,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:16:32,909 INFO L87 Difference]: Start difference. First operand 2568 states and 7207 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:33,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:33,287 INFO L93 Difference]: Finished difference Result 3203 states and 8605 transitions. [2021-06-05 18:16:33,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:16:33,287 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 18:16:33,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:33,290 INFO L225 Difference]: With dead ends: 3203 [2021-06-05 18:16:33,290 INFO L226 Difference]: Without dead ends: 2831 [2021-06-05 18:16:33,290 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 343.7ms TimeCoverageRelationStatistics Valid=416, Invalid=1066, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:16:33,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2831 states. [2021-06-05 18:16:33,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2831 to 2483. [2021-06-05 18:16:33,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 2482 states have (on average 2.78928283642224) internal successors, (6923), 2482 states have internal predecessors, (6923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:33,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 6923 transitions. [2021-06-05 18:16:33,314 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 6923 transitions. Word has length 80 [2021-06-05 18:16:33,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:33,314 INFO L482 AbstractCegarLoop]: Abstraction has 2483 states and 6923 transitions. [2021-06-05 18:16:33,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:33,314 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 6923 transitions. [2021-06-05 18:16:33,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:16:33,316 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:33,316 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:33,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 18:16:33,517 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:33,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:33,517 INFO L82 PathProgramCache]: Analyzing trace with hash 498592931, now seen corresponding path program 53 times [2021-06-05 18:16:33,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:33,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854369391] [2021-06-05 18:16:33,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:33,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:33,605 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 81 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:33,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:33,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854369391] [2021-06-05 18:16:33,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854369391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:33,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259864158] [2021-06-05 18:16:33,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:33,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 18:16:33,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:33,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:16:33,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:33,802 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:33,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259864158] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:16:33,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 18:16:33,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-06-05 18:16:33,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496245344] [2021-06-05 18:16:33,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:16:33,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:33,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:16:33,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:16:33,804 INFO L87 Difference]: Start difference. First operand 2483 states and 6923 transitions. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:33,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:33,925 INFO L93 Difference]: Finished difference Result 5807 states and 15758 transitions. [2021-06-05 18:16:33,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 18:16:33,925 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-05 18:16:33,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:33,927 INFO L225 Difference]: With dead ends: 5807 [2021-06-05 18:16:33,927 INFO L226 Difference]: Without dead ends: 1279 [2021-06-05 18:16:33,927 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:16:33,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-06-05 18:16:33,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1279. [2021-06-05 18:16:33,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 1278 states have (on average 2.5610328638497655) internal successors, (3273), 1278 states have internal predecessors, (3273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:33,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 3273 transitions. [2021-06-05 18:16:33,941 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 3273 transitions. Word has length 85 [2021-06-05 18:16:33,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:33,941 INFO L482 AbstractCegarLoop]: Abstraction has 1279 states and 3273 transitions. [2021-06-05 18:16:33,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:33,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 3273 transitions. [2021-06-05 18:16:33,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:16:33,942 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:33,942 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:34,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:34,157 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:34,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:34,157 INFO L82 PathProgramCache]: Analyzing trace with hash 945465466, now seen corresponding path program 54 times [2021-06-05 18:16:34,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:34,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754326042] [2021-06-05 18:16:34,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:34,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:34,236 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 77 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:34,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:34,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754326042] [2021-06-05 18:16:34,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754326042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:34,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268017976] [2021-06-05 18:16:34,236 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:34,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 18:16:34,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:34,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:16:34,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:34,392 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:34,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268017976] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:16:34,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 18:16:34,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-06-05 18:16:34,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421944668] [2021-06-05 18:16:34,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:16:34,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:34,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:16:34,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:16:34,393 INFO L87 Difference]: Start difference. First operand 1279 states and 3273 transitions. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:34,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:34,521 INFO L93 Difference]: Finished difference Result 2288 states and 5575 transitions. [2021-06-05 18:16:34,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 18:16:34,522 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-05 18:16:34,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:34,522 INFO L225 Difference]: With dead ends: 2288 [2021-06-05 18:16:34,522 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 18:16:34,522 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 130.8ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:16:34,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 18:16:34,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 18:16:34,523 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 18:16:34,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 18:16:34,523 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 85 [2021-06-05 18:16:34,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:34,523 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 18:16:34,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:34,523 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 18:16:34,523 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 18:16:34,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 18:16:34,739 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 18:16:34,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 06:16:34 BasicIcfg [2021-06-05 18:16:34,741 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 18:16:34,741 INFO L168 Benchmark]: Toolchain (without parser) took 43614.24 ms. Allocated memory was 348.1 MB in the beginning and 922.7 MB in the end (delta: 574.6 MB). Free memory was 310.5 MB in the beginning and 381.7 MB in the end (delta: -71.2 MB). Peak memory consumption was 504.4 MB. Max. memory is 16.0 GB. [2021-06-05 18:16:34,742 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 348.1 MB. Free memory was 328.7 MB in the beginning and 328.6 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 18:16:34,742 INFO L168 Benchmark]: CACSL2BoogieTranslator took 384.86 ms. Allocated memory is still 348.1 MB. Free memory was 310.3 MB in the beginning and 311.9 MB in the end (delta: -1.6 MB). Peak memory consumption was 4.4 MB. Max. memory is 16.0 GB. [2021-06-05 18:16:34,742 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.93 ms. Allocated memory is still 348.1 MB. Free memory was 311.9 MB in the beginning and 309.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 18:16:34,742 INFO L168 Benchmark]: Boogie Preprocessor took 15.21 ms. Allocated memory is still 348.1 MB. Free memory was 309.8 MB in the beginning and 308.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 18:16:34,742 INFO L168 Benchmark]: RCFGBuilder took 285.87 ms. Allocated memory is still 348.1 MB. Free memory was 308.7 MB in the beginning and 284.6 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-06-05 18:16:34,742 INFO L168 Benchmark]: TraceAbstraction took 42893.73 ms. Allocated memory was 348.1 MB in the beginning and 922.7 MB in the end (delta: 574.6 MB). Free memory was 284.6 MB in the beginning and 381.7 MB in the end (delta: -97.1 MB). Peak memory consumption was 480.7 MB. Max. memory is 16.0 GB. [2021-06-05 18:16:34,742 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 348.1 MB. Free memory was 328.7 MB in the beginning and 328.6 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 384.86 ms. Allocated memory is still 348.1 MB. Free memory was 310.3 MB in the beginning and 311.9 MB in the end (delta: -1.6 MB). Peak memory consumption was 4.4 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 29.93 ms. Allocated memory is still 348.1 MB. Free memory was 311.9 MB in the beginning and 309.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.21 ms. Allocated memory is still 348.1 MB. Free memory was 309.8 MB in the beginning and 308.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 285.87 ms. Allocated memory is still 348.1 MB. Free memory was 308.7 MB in the beginning and 284.6 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 42893.73 ms. Allocated memory was 348.1 MB in the beginning and 922.7 MB in the end (delta: 574.6 MB). Free memory was 284.6 MB in the beginning and 381.7 MB in the end (delta: -97.1 MB). Peak memory consumption was 480.7 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 for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 42826.8ms, OverallIterations: 65, TraceHistogramMax: 6, EmptinessCheckTime: 133.0ms, AutomataDifference: 13920.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 61.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6461 SDtfs, 24816 SDslu, 41922 SDs, 0 SdLazy, 7327 SolverSat, 2816 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3429.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5531 GetRequests, 3929 SyntacticMatches, 0 SemanticMatches, 1602 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8753 ImplicationChecksByTransitivity, 11949.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2568occurred in iteration=62, InterpolantAutomatonStates: 1326, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1607.6ms AutomataMinimizationTime, 65 MinimizatonAttempts, 32892 StatesRemovedByMinimization, 63 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 585.6ms SsaConstructionTime, 1406.8ms SatisfiabilityAnalysisTime, 10603.0ms InterpolantComputationTime, 8104 NumberOfCodeBlocks, 8100 NumberOfCodeBlocksAsserted, 241 NumberOfCheckSat, 7981 ConstructedInterpolants, 0 QuantifiedInterpolants, 30315 SizeOfPredicates, 484 NumberOfNonLiveVariables, 9052 ConjunctsInSsa, 768 ConjunctsInUnsatCore, 123 InterpolantComputations, 9 PerfectInterpolantSequences, 377/4840 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...