/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:42:53,060 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:42:53,062 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:42:53,081 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:42:53,081 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:42:53,083 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:42:53,085 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:42:53,099 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:42:53,101 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:42:53,102 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:42:53,105 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:42:53,106 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:42:53,106 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:42:53,109 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:42:53,111 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:42:53,113 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:42:53,115 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:42:53,118 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:42:53,120 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:42:53,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:42:53,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:42:53,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:42:53,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:42:53,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:42:53,136 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:42:53,141 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-07 11:42:53,142 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-07 11:42:53,144 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-07 11:42:53,144 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-07 11:42:53,147 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-07 11:42:53,147 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-07 11:42:53,150 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-07 11:42:53,150 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-07 11:42:53,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:42:53,151 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:42:53,152 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:42:53,153 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-07 11:42:53,173 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:42:53,174 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:42:53,175 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:42:53,175 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:42:53,176 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:42:53,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:42:53,176 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:42:53,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:42:53,176 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:42:53,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:42:53,178 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:42:53,178 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:42:53,178 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:42:53,179 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:42:53,179 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:42:53,179 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:42:53,179 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:42:53,179 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:42:53,179 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:42:53,180 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:42:53,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:42:53,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:42:53,180 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:42:53,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:42:53,181 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:42:53,181 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:42:53,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:42:53,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:42:53,182 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:42:53,182 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:42:53,466 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:42:53,478 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:42:53,482 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:42:53,483 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:42:53,484 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:42:53,484 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-07 11:42:53,561 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afbd2b4ba/c00c92d3d134453e87858417966a5db2/FLAG95cfd36b5 [2020-07-07 11:42:54,204 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:42:54,204 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-07 11:42:54,232 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afbd2b4ba/c00c92d3d134453e87858417966a5db2/FLAG95cfd36b5 [2020-07-07 11:42:54,437 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afbd2b4ba/c00c92d3d134453e87858417966a5db2 [2020-07-07 11:42:54,446 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:42:54,448 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:42:54,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:42:54,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:42:54,453 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:42:54,454 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:42:54" (1/1) ... [2020-07-07 11:42:54,457 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a618b03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:42:54, skipping insertion in model container [2020-07-07 11:42:54,457 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:42:54" (1/1) ... [2020-07-07 11:42:54,465 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:42:54,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:42:55,454 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:42:55,467 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:42:55,957 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:42:56,002 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:42:56,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:42:56 WrapperNode [2020-07-07 11:42:56,003 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:42:56,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:42:56,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:42:56,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:42:56,021 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:42:56" (1/1) ... [2020-07-07 11:42:56,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:42:56" (1/1) ... [2020-07-07 11:42:56,088 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:42:56" (1/1) ... [2020-07-07 11:42:56,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:42:56" (1/1) ... [2020-07-07 11:42:56,154 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:42:56" (1/1) ... [2020-07-07 11:42:56,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:42:56" (1/1) ... [2020-07-07 11:42:56,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:42:56" (1/1) ... [2020-07-07 11:42:56,203 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:42:56,204 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:42:56,204 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:42:56,204 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:42:56,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:42:56" (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 [2020-07-07 11:42:56,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:42:56,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:42:56,306 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 11:42:56,306 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:42:56,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:42:56,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-07 11:42:56,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-07 11:42:56,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-07 11:42:56,307 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-07 11:42:56,307 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 11:42:56,308 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 11:42:56,308 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-07 11:42:56,308 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-07 11:42:56,308 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-07 11:42:56,308 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-07 11:42:56,309 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-07 11:42:56,309 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-07 11:42:56,309 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-07 11:42:56,309 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-07 11:42:56,310 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:42:56,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:42:56,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:42:58,777 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:42:58,778 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 11:42:58,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:42:58 BoogieIcfgContainer [2020-07-07 11:42:58,787 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:42:58,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:42:58,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:42:58,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:42:58,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:42:54" (1/3) ... [2020-07-07 11:42:58,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c0bf95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:42:58, skipping insertion in model container [2020-07-07 11:42:58,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:42:56" (2/3) ... [2020-07-07 11:42:58,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c0bf95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:42:58, skipping insertion in model container [2020-07-07 11:42:58,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:42:58" (3/3) ... [2020-07-07 11:42:58,795 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-07 11:42:58,806 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:42:58,815 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:42:58,828 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:42:58,855 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:42:58,856 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:42:58,856 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:42:58,856 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:42:58,856 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:42:58,856 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:42:58,856 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:42:58,856 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:42:58,892 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states. [2020-07-07 11:42:58,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-07 11:42:58,924 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:42:58,925 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:42:58,926 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:42:58,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:42:58,931 INFO L82 PathProgramCache]: Analyzing trace with hash 578636414, now seen corresponding path program 1 times [2020-07-07 11:42:58,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:42:58,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172327406] [2020-07-07 11:42:58,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:42:59,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:00,918 WARN L193 SmtUtils]: Spent 579.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:43:00,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:43:01,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172327406] [2020-07-07 11:43:01,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:43:01,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:43:01,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379055701] [2020-07-07 11:43:01,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:43:01,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:43:01,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:43:01,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:43:01,182 INFO L87 Difference]: Start difference. First operand 796 states. Second operand 4 states. [2020-07-07 11:43:01,704 WARN L193 SmtUtils]: Spent 458.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-07-07 11:43:06,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:43:06,827 INFO L93 Difference]: Finished difference Result 1515 states and 2659 transitions. [2020-07-07 11:43:06,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:43:06,830 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-07-07 11:43:06,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:43:06,859 INFO L225 Difference]: With dead ends: 1515 [2020-07-07 11:43:06,860 INFO L226 Difference]: Without dead ends: 1299 [2020-07-07 11:43:06,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:43:06,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2020-07-07 11:43:06,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1297. [2020-07-07 11:43:06,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1297 states. [2020-07-07 11:43:06,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 2028 transitions. [2020-07-07 11:43:07,001 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 2028 transitions. Word has length 318 [2020-07-07 11:43:07,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:43:07,003 INFO L479 AbstractCegarLoop]: Abstraction has 1297 states and 2028 transitions. [2020-07-07 11:43:07,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:43:07,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 2028 transitions. [2020-07-07 11:43:07,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-07 11:43:07,013 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:43:07,013 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:43:07,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:43:07,014 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:43:07,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:43:07,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1367796252, now seen corresponding path program 1 times [2020-07-07 11:43:07,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:43:07,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387456750] [2020-07-07 11:43:07,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:43:07,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:08,134 WARN L193 SmtUtils]: Spent 572.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:43:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:08,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:43:08,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387456750] [2020-07-07 11:43:08,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:43:08,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:43:08,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347857035] [2020-07-07 11:43:08,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:43:08,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:43:08,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:43:08,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:43:08,418 INFO L87 Difference]: Start difference. First operand 1297 states and 2028 transitions. Second operand 4 states. [2020-07-07 11:43:09,073 WARN L193 SmtUtils]: Spent 594.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-07-07 11:43:13,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:43:13,716 INFO L93 Difference]: Finished difference Result 2671 states and 4201 transitions. [2020-07-07 11:43:13,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:43:13,717 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-07-07 11:43:13,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:43:13,732 INFO L225 Difference]: With dead ends: 2671 [2020-07-07 11:43:13,733 INFO L226 Difference]: Without dead ends: 2289 [2020-07-07 11:43:13,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:43:13,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2020-07-07 11:43:13,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2287. [2020-07-07 11:43:13,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2287 states. [2020-07-07 11:43:13,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 3564 transitions. [2020-07-07 11:43:13,902 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 3564 transitions. Word has length 318 [2020-07-07 11:43:13,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:43:13,904 INFO L479 AbstractCegarLoop]: Abstraction has 2287 states and 3564 transitions. [2020-07-07 11:43:13,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:43:13,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 3564 transitions. [2020-07-07 11:43:13,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-07 11:43:13,912 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:43:13,913 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:43:13,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 11:43:13,913 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:43:13,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:43:13,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1797025293, now seen corresponding path program 1 times [2020-07-07 11:43:13,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:43:13,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625951117] [2020-07-07 11:43:13,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:43:14,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:14,712 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:43:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:14,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:43:14,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625951117] [2020-07-07 11:43:14,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:43:14,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:43:14,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416698859] [2020-07-07 11:43:14,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:43:14,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:43:14,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:43:14,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:43:14,924 INFO L87 Difference]: Start difference. First operand 2287 states and 3564 transitions. Second operand 4 states. [2020-07-07 11:43:15,344 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-07-07 11:43:19,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:43:19,441 INFO L93 Difference]: Finished difference Result 4943 states and 7762 transitions. [2020-07-07 11:43:19,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:43:19,442 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-07-07 11:43:19,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:43:19,464 INFO L225 Difference]: With dead ends: 4943 [2020-07-07 11:43:19,464 INFO L226 Difference]: Without dead ends: 4229 [2020-07-07 11:43:19,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:43:19,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4229 states. [2020-07-07 11:43:19,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4229 to 4227. [2020-07-07 11:43:19,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4227 states. [2020-07-07 11:43:19,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4227 states to 4227 states and 6568 transitions. [2020-07-07 11:43:19,592 INFO L78 Accepts]: Start accepts. Automaton has 4227 states and 6568 transitions. Word has length 318 [2020-07-07 11:43:19,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:43:19,593 INFO L479 AbstractCegarLoop]: Abstraction has 4227 states and 6568 transitions. [2020-07-07 11:43:19,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:43:19,593 INFO L276 IsEmpty]: Start isEmpty. Operand 4227 states and 6568 transitions. [2020-07-07 11:43:19,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-07 11:43:19,604 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:43:19,605 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:43:19,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 11:43:19,605 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:43:19,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:43:19,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1914723175, now seen corresponding path program 1 times [2020-07-07 11:43:19,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:43:19,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304821365] [2020-07-07 11:43:19,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:43:19,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:20,417 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:43:20,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:20,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:43:20,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304821365] [2020-07-07 11:43:20,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:43:20,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:43:20,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410268188] [2020-07-07 11:43:20,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:43:20,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:43:20,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:43:20,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:43:20,569 INFO L87 Difference]: Start difference. First operand 4227 states and 6568 transitions. Second operand 4 states. [2020-07-07 11:43:21,002 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-07-07 11:43:24,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:43:24,984 INFO L93 Difference]: Finished difference Result 9359 states and 14670 transitions. [2020-07-07 11:43:24,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:43:24,987 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-07-07 11:43:24,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:43:25,025 INFO L225 Difference]: With dead ends: 9359 [2020-07-07 11:43:25,025 INFO L226 Difference]: Without dead ends: 8029 [2020-07-07 11:43:25,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:43:25,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8029 states. [2020-07-07 11:43:25,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8029 to 8027. [2020-07-07 11:43:25,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8027 states. [2020-07-07 11:43:25,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8027 states to 8027 states and 12440 transitions. [2020-07-07 11:43:25,366 INFO L78 Accepts]: Start accepts. Automaton has 8027 states and 12440 transitions. Word has length 318 [2020-07-07 11:43:25,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:43:25,369 INFO L479 AbstractCegarLoop]: Abstraction has 8027 states and 12440 transitions. [2020-07-07 11:43:25,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:43:25,369 INFO L276 IsEmpty]: Start isEmpty. Operand 8027 states and 12440 transitions. [2020-07-07 11:43:25,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-07 11:43:25,386 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:43:25,386 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:43:25,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 11:43:25,387 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:43:25,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:43:25,388 INFO L82 PathProgramCache]: Analyzing trace with hash 769893352, now seen corresponding path program 1 times [2020-07-07 11:43:25,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:43:25,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580536050] [2020-07-07 11:43:25,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:43:25,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:26,458 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:43:26,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:43:26,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580536050] [2020-07-07 11:43:26,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:43:26,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:43:26,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945292114] [2020-07-07 11:43:26,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:43:26,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:43:26,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:43:26,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:43:26,605 INFO L87 Difference]: Start difference. First operand 8027 states and 12440 transitions. Second operand 5 states. [2020-07-07 11:43:33,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:43:33,432 INFO L93 Difference]: Finished difference Result 23754 states and 36777 transitions. [2020-07-07 11:43:33,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:43:33,433 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 318 [2020-07-07 11:43:33,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:43:33,489 INFO L225 Difference]: With dead ends: 23754 [2020-07-07 11:43:33,490 INFO L226 Difference]: Without dead ends: 15742 [2020-07-07 11:43:33,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:43:33,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15742 states. [2020-07-07 11:43:34,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15742 to 15740. [2020-07-07 11:43:34,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15740 states. [2020-07-07 11:43:34,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15740 states to 15740 states and 24254 transitions. [2020-07-07 11:43:34,180 INFO L78 Accepts]: Start accepts. Automaton has 15740 states and 24254 transitions. Word has length 318 [2020-07-07 11:43:34,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:43:34,181 INFO L479 AbstractCegarLoop]: Abstraction has 15740 states and 24254 transitions. [2020-07-07 11:43:34,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:43:34,181 INFO L276 IsEmpty]: Start isEmpty. Operand 15740 states and 24254 transitions. [2020-07-07 11:43:34,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-07-07 11:43:34,215 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:43:34,216 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:43:34,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 11:43:34,216 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:43:34,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:43:34,217 INFO L82 PathProgramCache]: Analyzing trace with hash -685152901, now seen corresponding path program 1 times [2020-07-07 11:43:34,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:43:34,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078933617] [2020-07-07 11:43:34,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:43:34,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:34,783 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:43:34,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:43:34,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078933617] [2020-07-07 11:43:34,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:43:34,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:43:34,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806459519] [2020-07-07 11:43:34,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:43:34,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:43:34,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:43:34,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:43:34,915 INFO L87 Difference]: Start difference. First operand 15740 states and 24254 transitions. Second operand 4 states. [2020-07-07 11:43:42,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:43:42,973 INFO L93 Difference]: Finished difference Result 46481 states and 71518 transitions. [2020-07-07 11:43:42,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:43:42,977 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 320 [2020-07-07 11:43:42,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:43:43,043 INFO L225 Difference]: With dead ends: 46481 [2020-07-07 11:43:43,043 INFO L226 Difference]: Without dead ends: 30870 [2020-07-07 11:43:43,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:43:43,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30870 states. [2020-07-07 11:43:44,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30870 to 30868. [2020-07-07 11:43:44,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30868 states. [2020-07-07 11:43:44,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30868 states to 30868 states and 47285 transitions. [2020-07-07 11:43:44,773 INFO L78 Accepts]: Start accepts. Automaton has 30868 states and 47285 transitions. Word has length 320 [2020-07-07 11:43:44,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:43:44,773 INFO L479 AbstractCegarLoop]: Abstraction has 30868 states and 47285 transitions. [2020-07-07 11:43:44,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:43:44,773 INFO L276 IsEmpty]: Start isEmpty. Operand 30868 states and 47285 transitions. [2020-07-07 11:43:44,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-07-07 11:43:44,828 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:43:44,829 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:43:44,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 11:43:44,829 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:43:44,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:43:44,830 INFO L82 PathProgramCache]: Analyzing trace with hash -810813248, now seen corresponding path program 1 times [2020-07-07 11:43:44,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:43:44,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627899612] [2020-07-07 11:43:44,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:43:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:45,458 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:43:45,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:45,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:43:45,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627899612] [2020-07-07 11:43:45,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:43:45,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:43:45,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134896075] [2020-07-07 11:43:45,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:43:45,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:43:45,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:43:45,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:43:45,556 INFO L87 Difference]: Start difference. First operand 30868 states and 47285 transitions. Second operand 4 states. [2020-07-07 11:43:54,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:43:54,249 INFO L93 Difference]: Finished difference Result 92529 states and 141731 transitions. [2020-07-07 11:43:54,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:43:54,249 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 320 [2020-07-07 11:43:54,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:43:54,395 INFO L225 Difference]: With dead ends: 92529 [2020-07-07 11:43:54,396 INFO L226 Difference]: Without dead ends: 61703 [2020-07-07 11:43:54,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:43:54,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61703 states. [2020-07-07 11:43:55,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61703 to 30887. [2020-07-07 11:43:55,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30887 states. [2020-07-07 11:43:55,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30887 states to 30887 states and 47313 transitions. [2020-07-07 11:43:55,634 INFO L78 Accepts]: Start accepts. Automaton has 30887 states and 47313 transitions. Word has length 320 [2020-07-07 11:43:55,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:43:55,634 INFO L479 AbstractCegarLoop]: Abstraction has 30887 states and 47313 transitions. [2020-07-07 11:43:55,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:43:55,634 INFO L276 IsEmpty]: Start isEmpty. Operand 30887 states and 47313 transitions. [2020-07-07 11:43:55,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-07-07 11:43:55,683 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:43:55,683 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:43:55,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 11:43:55,684 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:43:55,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:43:55,684 INFO L82 PathProgramCache]: Analyzing trace with hash -83680004, now seen corresponding path program 1 times [2020-07-07 11:43:55,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:43:55,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107286669] [2020-07-07 11:43:55,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:43:55,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:56,167 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:43:56,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:56,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:43:56,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107286669] [2020-07-07 11:43:56,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:43:56,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:43:56,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251272286] [2020-07-07 11:43:56,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:43:56,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:43:56,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:43:56,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:43:56,492 INFO L87 Difference]: Start difference. First operand 30887 states and 47313 transitions. Second operand 4 states. [2020-07-07 11:44:05,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:44:05,811 INFO L93 Difference]: Finished difference Result 92548 states and 141752 transitions. [2020-07-07 11:44:05,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:44:05,812 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 321 [2020-07-07 11:44:05,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:44:05,872 INFO L225 Difference]: With dead ends: 92548 [2020-07-07 11:44:05,873 INFO L226 Difference]: Without dead ends: 61721 [2020-07-07 11:44:05,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:44:05,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61721 states. [2020-07-07 11:44:06,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61721 to 30905. [2020-07-07 11:44:06,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30905 states. [2020-07-07 11:44:06,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30905 states to 30905 states and 47334 transitions. [2020-07-07 11:44:06,907 INFO L78 Accepts]: Start accepts. Automaton has 30905 states and 47334 transitions. Word has length 321 [2020-07-07 11:44:06,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:44:06,907 INFO L479 AbstractCegarLoop]: Abstraction has 30905 states and 47334 transitions. [2020-07-07 11:44:06,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:44:06,907 INFO L276 IsEmpty]: Start isEmpty. Operand 30905 states and 47334 transitions. [2020-07-07 11:44:06,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-07-07 11:44:06,929 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:44:06,929 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:44:06,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 11:44:06,929 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:44:06,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:44:06,930 INFO L82 PathProgramCache]: Analyzing trace with hash 165674294, now seen corresponding path program 1 times [2020-07-07 11:44:06,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:44:06,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500692224] [2020-07-07 11:44:06,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:44:07,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:44:07,514 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:44:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:44:08,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:44:08,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500692224] [2020-07-07 11:44:08,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:44:08,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:44:08,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048586171] [2020-07-07 11:44:08,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:44:08,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:44:08,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:44:08,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:44:08,048 INFO L87 Difference]: Start difference. First operand 30905 states and 47334 transitions. Second operand 4 states. [2020-07-07 11:44:17,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:44:17,432 INFO L93 Difference]: Finished difference Result 87746 states and 134159 transitions. [2020-07-07 11:44:17,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:44:17,436 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 322 [2020-07-07 11:44:17,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:44:17,497 INFO L225 Difference]: With dead ends: 87746 [2020-07-07 11:44:17,497 INFO L226 Difference]: Without dead ends: 57086 [2020-07-07 11:44:17,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:44:17,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57086 states. [2020-07-07 11:44:20,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57086 to 57084. [2020-07-07 11:44:20,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57084 states. [2020-07-07 11:44:20,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57084 states to 57084 states and 86830 transitions. [2020-07-07 11:44:20,387 INFO L78 Accepts]: Start accepts. Automaton has 57084 states and 86830 transitions. Word has length 322 [2020-07-07 11:44:20,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:44:20,388 INFO L479 AbstractCegarLoop]: Abstraction has 57084 states and 86830 transitions. [2020-07-07 11:44:20,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:44:20,388 INFO L276 IsEmpty]: Start isEmpty. Operand 57084 states and 86830 transitions. [2020-07-07 11:44:20,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-07-07 11:44:20,436 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:44:20,436 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:44:20,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-07 11:44:20,437 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:44:20,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:44:20,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1404392915, now seen corresponding path program 1 times [2020-07-07 11:44:20,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:44:20,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981209697] [2020-07-07 11:44:20,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:44:21,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:44:21,763 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:44:21,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:44:21,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:44:21,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981209697] [2020-07-07 11:44:21,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:44:21,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:44:21,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661328832] [2020-07-07 11:44:21,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:44:21,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:44:21,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:44:21,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:44:21,877 INFO L87 Difference]: Start difference. First operand 57084 states and 86830 transitions. Second operand 5 states. [2020-07-07 11:44:29,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:44:29,211 INFO L93 Difference]: Finished difference Result 115449 states and 175645 transitions. [2020-07-07 11:44:29,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:44:29,211 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 322 [2020-07-07 11:44:29,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:44:29,277 INFO L225 Difference]: With dead ends: 115449 [2020-07-07 11:44:29,277 INFO L226 Difference]: Without dead ends: 57905 [2020-07-07 11:44:29,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:44:29,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57905 states. [2020-07-07 11:44:31,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57905 to 57903. [2020-07-07 11:44:31,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57903 states. [2020-07-07 11:44:31,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57903 states to 57903 states and 87752 transitions. [2020-07-07 11:44:31,478 INFO L78 Accepts]: Start accepts. Automaton has 57903 states and 87752 transitions. Word has length 322 [2020-07-07 11:44:31,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:44:31,478 INFO L479 AbstractCegarLoop]: Abstraction has 57903 states and 87752 transitions. [2020-07-07 11:44:31,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:44:31,478 INFO L276 IsEmpty]: Start isEmpty. Operand 57903 states and 87752 transitions. [2020-07-07 11:44:31,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-07 11:44:31,529 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:44:31,529 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:44:31,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-07 11:44:31,530 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:44:31,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:44:31,530 INFO L82 PathProgramCache]: Analyzing trace with hash -715741738, now seen corresponding path program 1 times [2020-07-07 11:44:31,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:44:31,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259461564] [2020-07-07 11:44:31,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:44:31,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:44:32,148 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:44:32,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:44:32,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:44:32,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259461564] [2020-07-07 11:44:32,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:44:32,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:44:32,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842627509] [2020-07-07 11:44:32,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:44:32,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:44:32,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:44:32,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:44:32,249 INFO L87 Difference]: Start difference. First operand 57903 states and 87752 transitions. Second operand 4 states. [2020-07-07 11:44:41,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:44:41,138 INFO L93 Difference]: Finished difference Result 172837 states and 261779 transitions. [2020-07-07 11:44:41,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:44:41,139 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-07-07 11:44:41,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:44:41,281 INFO L225 Difference]: With dead ends: 172837 [2020-07-07 11:44:41,281 INFO L226 Difference]: Without dead ends: 115387 [2020-07-07 11:44:41,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:44:41,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115387 states. [2020-07-07 11:44:43,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115387 to 57961. [2020-07-07 11:44:43,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57961 states. [2020-07-07 11:44:43,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57961 states to 57961 states and 87827 transitions. [2020-07-07 11:44:43,828 INFO L78 Accepts]: Start accepts. Automaton has 57961 states and 87827 transitions. Word has length 324 [2020-07-07 11:44:43,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:44:43,828 INFO L479 AbstractCegarLoop]: Abstraction has 57961 states and 87827 transitions. [2020-07-07 11:44:43,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:44:43,828 INFO L276 IsEmpty]: Start isEmpty. Operand 57961 states and 87827 transitions. [2020-07-07 11:44:43,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-07 11:44:43,866 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:44:43,866 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:44:43,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-07 11:44:43,867 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:44:43,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:44:43,867 INFO L82 PathProgramCache]: Analyzing trace with hash 396725324, now seen corresponding path program 1 times [2020-07-07 11:44:43,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:44:43,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260754392] [2020-07-07 11:44:43,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:44:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:44:44,529 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:44:44,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:44:44,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:44:44,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260754392] [2020-07-07 11:44:44,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:44:44,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:44:44,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496930151] [2020-07-07 11:44:44,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:44:44,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:44:44,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:44:44,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:44:44,650 INFO L87 Difference]: Start difference. First operand 57961 states and 87827 transitions. Second operand 4 states. [2020-07-07 11:44:57,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:44:57,273 INFO L93 Difference]: Finished difference Result 171218 states and 259030 transitions. [2020-07-07 11:44:57,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:44:57,273 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-07-07 11:44:57,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:44:57,397 INFO L225 Difference]: With dead ends: 171218 [2020-07-07 11:44:57,398 INFO L226 Difference]: Without dead ends: 113542 [2020-07-07 11:44:57,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:44:57,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113542 states. [2020-07-07 11:45:03,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113542 to 113540. [2020-07-07 11:45:03,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113540 states. [2020-07-07 11:45:03,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113540 states to 113540 states and 170856 transitions. [2020-07-07 11:45:03,971 INFO L78 Accepts]: Start accepts. Automaton has 113540 states and 170856 transitions. Word has length 324 [2020-07-07 11:45:03,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:45:03,971 INFO L479 AbstractCegarLoop]: Abstraction has 113540 states and 170856 transitions. [2020-07-07 11:45:03,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:45:03,972 INFO L276 IsEmpty]: Start isEmpty. Operand 113540 states and 170856 transitions. [2020-07-07 11:45:04,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-07 11:45:04,074 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:45:04,075 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:45:04,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-07 11:45:04,075 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:45:04,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:45:04,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1430415401, now seen corresponding path program 1 times [2020-07-07 11:45:04,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:45:04,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598744906] [2020-07-07 11:45:04,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:45:04,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:45:04,938 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:45:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:45:05,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:45:05,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598744906] [2020-07-07 11:45:05,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:45:05,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:45:05,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577329105] [2020-07-07 11:45:05,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:45:05,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:45:05,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:45:05,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:45:05,078 INFO L87 Difference]: Start difference. First operand 113540 states and 170856 transitions. Second operand 5 states. [2020-07-07 11:45:16,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:45:16,103 INFO L93 Difference]: Finished difference Result 230524 states and 346909 transitions. [2020-07-07 11:45:16,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:45:16,104 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2020-07-07 11:45:16,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:45:16,240 INFO L225 Difference]: With dead ends: 230524 [2020-07-07 11:45:16,240 INFO L226 Difference]: Without dead ends: 115930 [2020-07-07 11:45:16,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:45:16,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115930 states. [2020-07-07 11:45:23,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115930 to 115928. [2020-07-07 11:45:23,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115928 states. [2020-07-07 11:45:23,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115928 states to 115928 states and 173777 transitions. [2020-07-07 11:45:23,780 INFO L78 Accepts]: Start accepts. Automaton has 115928 states and 173777 transitions. Word has length 324 [2020-07-07 11:45:23,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:45:23,781 INFO L479 AbstractCegarLoop]: Abstraction has 115928 states and 173777 transitions. [2020-07-07 11:45:23,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:45:23,781 INFO L276 IsEmpty]: Start isEmpty. Operand 115928 states and 173777 transitions. [2020-07-07 11:45:23,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-07 11:45:23,865 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:45:23,865 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:45:23,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-07 11:45:23,865 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:45:23,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:45:23,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1590895399, now seen corresponding path program 1 times [2020-07-07 11:45:23,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:45:23,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976521258] [2020-07-07 11:45:23,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:45:24,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:45:24,806 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:45:24,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:45:24,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:45:24,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976521258] [2020-07-07 11:45:24,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:45:24,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:45:24,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089062733] [2020-07-07 11:45:24,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:45:24,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:45:24,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:45:24,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:45:24,899 INFO L87 Difference]: Start difference. First operand 115928 states and 173777 transitions. Second operand 5 states. [2020-07-07 11:45:51,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:45:51,786 INFO L93 Difference]: Finished difference Result 441761 states and 661348 transitions. [2020-07-07 11:45:51,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 11:45:51,787 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2020-07-07 11:45:51,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:45:52,235 INFO L225 Difference]: With dead ends: 441761 [2020-07-07 11:45:52,235 INFO L226 Difference]: Without dead ends: 327813 [2020-07-07 11:45:52,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:45:52,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327813 states. [2020-07-07 11:46:00,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327813 to 116455. [2020-07-07 11:46:00,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116455 states. [2020-07-07 11:46:00,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116455 states to 116455 states and 174537 transitions. [2020-07-07 11:46:00,393 INFO L78 Accepts]: Start accepts. Automaton has 116455 states and 174537 transitions. Word has length 324 [2020-07-07 11:46:00,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:46:00,393 INFO L479 AbstractCegarLoop]: Abstraction has 116455 states and 174537 transitions. [2020-07-07 11:46:00,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:46:00,393 INFO L276 IsEmpty]: Start isEmpty. Operand 116455 states and 174537 transitions. [2020-07-07 11:46:00,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-07 11:46:00,470 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:46:00,470 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:46:00,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-07 11:46:00,470 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:46:00,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:46:00,471 INFO L82 PathProgramCache]: Analyzing trace with hash 445665130, now seen corresponding path program 1 times [2020-07-07 11:46:00,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:46:00,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690168302] [2020-07-07 11:46:00,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:46:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:46:01,070 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:46:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:46:01,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:46:01,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690168302] [2020-07-07 11:46:01,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:46:01,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:46:01,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174024366] [2020-07-07 11:46:01,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:46:01,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:46:01,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:46:01,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:46:01,177 INFO L87 Difference]: Start difference. First operand 116455 states and 174537 transitions. Second operand 4 states. [2020-07-07 11:46:17,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:46:17,874 INFO L93 Difference]: Finished difference Result 295887 states and 447035 transitions. [2020-07-07 11:46:17,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:46:17,875 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-07-07 11:46:17,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:46:18,088 INFO L225 Difference]: With dead ends: 295887 [2020-07-07 11:46:18,088 INFO L226 Difference]: Without dead ends: 185881 [2020-07-07 11:46:18,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:46:18,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185881 states. [2020-07-07 11:46:29,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185881 to 146359. [2020-07-07 11:46:29,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146359 states. [2020-07-07 11:46:29,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146359 states to 146359 states and 222895 transitions. [2020-07-07 11:46:29,539 INFO L78 Accepts]: Start accepts. Automaton has 146359 states and 222895 transitions. Word has length 324 [2020-07-07 11:46:29,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:46:29,540 INFO L479 AbstractCegarLoop]: Abstraction has 146359 states and 222895 transitions. [2020-07-07 11:46:29,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:46:29,540 INFO L276 IsEmpty]: Start isEmpty. Operand 146359 states and 222895 transitions. [2020-07-07 11:46:29,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-07 11:46:29,626 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:46:29,626 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:46:29,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-07 11:46:29,627 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:46:29,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:46:29,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1844980394, now seen corresponding path program 1 times [2020-07-07 11:46:29,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:46:29,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454961748] [2020-07-07 11:46:29,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:46:29,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:46:30,158 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:46:30,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:46:30,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:46:30,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454961748] [2020-07-07 11:46:30,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:46:30,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:46:30,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009619362] [2020-07-07 11:46:30,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:46:30,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:46:30,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:46:30,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:46:30,236 INFO L87 Difference]: Start difference. First operand 146359 states and 222895 transitions. Second operand 4 states. [2020-07-07 11:46:52,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:46:52,827 INFO L93 Difference]: Finished difference Result 370403 states and 566989 transitions. [2020-07-07 11:46:52,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:46:52,828 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-07 11:46:52,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:46:53,146 INFO L225 Difference]: With dead ends: 370403 [2020-07-07 11:46:53,146 INFO L226 Difference]: Without dead ends: 231897 [2020-07-07 11:46:53,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:46:53,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231897 states. [2020-07-07 11:47:08,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231897 to 199847. [2020-07-07 11:47:08,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199847 states. [2020-07-07 11:47:08,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199847 states to 199847 states and 309023 transitions. [2020-07-07 11:47:08,683 INFO L78 Accepts]: Start accepts. Automaton has 199847 states and 309023 transitions. Word has length 326 [2020-07-07 11:47:08,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:47:08,683 INFO L479 AbstractCegarLoop]: Abstraction has 199847 states and 309023 transitions. [2020-07-07 11:47:08,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:47:08,684 INFO L276 IsEmpty]: Start isEmpty. Operand 199847 states and 309023 transitions. [2020-07-07 11:47:08,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-07 11:47:08,768 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:47:08,769 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:47:08,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-07 11:47:08,769 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:47:08,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:47:08,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1689083675, now seen corresponding path program 1 times [2020-07-07 11:47:08,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:47:08,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733120837] [2020-07-07 11:47:08,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:47:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:47:09,302 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:47:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:47:09,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:47:09,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733120837] [2020-07-07 11:47:09,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:47:09,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:47:09,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808444419] [2020-07-07 11:47:09,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:47:09,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:47:09,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:47:09,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:47:09,369 INFO L87 Difference]: Start difference. First operand 199847 states and 309023 transitions. Second operand 4 states. [2020-07-07 11:47:46,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:47:46,267 INFO L93 Difference]: Finished difference Result 593639 states and 917537 transitions. [2020-07-07 11:47:46,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:47:46,268 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-07 11:47:46,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:47:46,833 INFO L225 Difference]: With dead ends: 593639 [2020-07-07 11:47:46,833 INFO L226 Difference]: Without dead ends: 396515 [2020-07-07 11:47:46,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:47:47,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396515 states. [2020-07-07 11:48:01,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396515 to 200115. [2020-07-07 11:48:01,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200115 states. [2020-07-07 11:48:01,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200115 states to 200115 states and 309383 transitions. [2020-07-07 11:48:01,586 INFO L78 Accepts]: Start accepts. Automaton has 200115 states and 309383 transitions. Word has length 326 [2020-07-07 11:48:01,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:48:01,587 INFO L479 AbstractCegarLoop]: Abstraction has 200115 states and 309383 transitions. [2020-07-07 11:48:01,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:48:01,587 INFO L276 IsEmpty]: Start isEmpty. Operand 200115 states and 309383 transitions. [2020-07-07 11:48:01,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-07 11:48:01,674 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:48:01,674 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:48:01,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-07 11:48:01,675 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:48:01,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:48:01,675 INFO L82 PathProgramCache]: Analyzing trace with hash -700863383, now seen corresponding path program 1 times [2020-07-07 11:48:01,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:48:01,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435910549] [2020-07-07 11:48:01,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:48:01,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:48:02,231 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:48:02,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:48:02,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:48:02,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435910549] [2020-07-07 11:48:02,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:48:02,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:48:02,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062936041] [2020-07-07 11:48:02,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:48:02,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:48:02,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:48:02,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:48:02,307 INFO L87 Difference]: Start difference. First operand 200115 states and 309383 transitions. Second operand 4 states. [2020-07-07 11:48:39,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:48:39,732 INFO L93 Difference]: Finished difference Result 593819 states and 917669 transitions. [2020-07-07 11:48:39,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:48:39,733 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-07-07 11:48:39,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:48:40,383 INFO L225 Difference]: With dead ends: 593819 [2020-07-07 11:48:40,383 INFO L226 Difference]: Without dead ends: 396715 [2020-07-07 11:48:40,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:48:40,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396715 states. [2020-07-07 11:49:03,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396715 to 200347. [2020-07-07 11:49:03,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200347 states. [2020-07-07 11:49:04,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200347 states to 200347 states and 309609 transitions. [2020-07-07 11:49:04,125 INFO L78 Accepts]: Start accepts. Automaton has 200347 states and 309609 transitions. Word has length 327 [2020-07-07 11:49:04,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:49:04,125 INFO L479 AbstractCegarLoop]: Abstraction has 200347 states and 309609 transitions. [2020-07-07 11:49:04,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:49:04,125 INFO L276 IsEmpty]: Start isEmpty. Operand 200347 states and 309609 transitions. [2020-07-07 11:49:04,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-07 11:49:04,210 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:49:04,211 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:49:04,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-07 11:49:04,211 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:49:04,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:49:04,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1551390185, now seen corresponding path program 1 times [2020-07-07 11:49:04,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:49:04,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622406429] [2020-07-07 11:49:04,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:49:04,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:49:04,804 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:49:04,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:49:05,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:49:05,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622406429] [2020-07-07 11:49:05,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:49:05,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:49:05,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925216793] [2020-07-07 11:49:05,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 11:49:05,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:49:05,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 11:49:05,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:49:05,775 INFO L87 Difference]: Start difference. First operand 200347 states and 309609 transitions. Second operand 6 states. [2020-07-07 11:49:06,273 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-07 11:49:25,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:49:25,670 INFO L93 Difference]: Finished difference Result 393817 states and 608812 transitions. [2020-07-07 11:49:25,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:49:25,671 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 327 [2020-07-07 11:49:25,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:49:25,954 INFO L225 Difference]: With dead ends: 393817 [2020-07-07 11:49:25,955 INFO L226 Difference]: Without dead ends: 200347 [2020-07-07 11:49:26,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:49:26,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200347 states. [2020-07-07 11:49:45,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200347 to 200347. [2020-07-07 11:49:45,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200347 states. [2020-07-07 11:49:46,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200347 states to 200347 states and 307087 transitions. [2020-07-07 11:49:46,332 INFO L78 Accepts]: Start accepts. Automaton has 200347 states and 307087 transitions. Word has length 327 [2020-07-07 11:49:46,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:49:46,332 INFO L479 AbstractCegarLoop]: Abstraction has 200347 states and 307087 transitions. [2020-07-07 11:49:46,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 11:49:46,332 INFO L276 IsEmpty]: Start isEmpty. Operand 200347 states and 307087 transitions. [2020-07-07 11:49:46,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-07 11:49:46,423 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:49:46,423 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:49:46,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-07 11:49:46,423 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:49:46,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:49:46,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1871199150, now seen corresponding path program 1 times [2020-07-07 11:49:46,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:49:46,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439515155] [2020-07-07 11:49:46,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:49:46,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:49:47,542 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:49:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:49:47,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:49:47,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439515155] [2020-07-07 11:49:47,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:49:47,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-07 11:49:47,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514805573] [2020-07-07 11:49:47,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 11:49:47,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:49:47,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 11:49:47,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:49:47,762 INFO L87 Difference]: Start difference. First operand 200347 states and 307087 transitions. Second operand 11 states. [2020-07-07 11:49:48,274 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification that was a NOOP. DAG size: 282 [2020-07-07 11:50:44,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:50:44,285 INFO L93 Difference]: Finished difference Result 718473 states and 1114748 transitions. [2020-07-07 11:50:44,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 11:50:44,286 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 327 [2020-07-07 11:50:44,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:50:45,142 INFO L225 Difference]: With dead ends: 718473 [2020-07-07 11:50:45,143 INFO L226 Difference]: Without dead ends: 525651 [2020-07-07 11:50:45,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-07-07 11:50:45,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525651 states. [2020-07-07 11:51:24,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525651 to 379683. [2020-07-07 11:51:24,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379683 states. [2020-07-07 11:51:25,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379683 states to 379683 states and 582699 transitions. [2020-07-07 11:51:25,121 INFO L78 Accepts]: Start accepts. Automaton has 379683 states and 582699 transitions. Word has length 327 [2020-07-07 11:51:25,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:51:25,121 INFO L479 AbstractCegarLoop]: Abstraction has 379683 states and 582699 transitions. [2020-07-07 11:51:25,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 11:51:25,121 INFO L276 IsEmpty]: Start isEmpty. Operand 379683 states and 582699 transitions. [2020-07-07 11:51:25,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-07 11:51:25,224 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:51:25,224 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:51:25,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-07 11:51:25,225 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:51:25,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:51:25,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1485523804, now seen corresponding path program 1 times [2020-07-07 11:51:25,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:51:25,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495671564] [2020-07-07 11:51:25,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:51:25,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:51:25,978 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:51:25,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:51:26,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:51:26,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495671564] [2020-07-07 11:51:26,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:51:26,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:51:26,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540538839] [2020-07-07 11:51:26,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:51:26,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:51:26,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:51:26,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:51:26,081 INFO L87 Difference]: Start difference. First operand 379683 states and 582699 transitions. Second operand 5 states. [2020-07-07 11:52:48,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:52:48,991 INFO L93 Difference]: Finished difference Result 1120805 states and 1721566 transitions. [2020-07-07 11:52:48,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:52:48,993 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 327 [2020-07-07 11:52:48,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:52:50,275 INFO L225 Difference]: With dead ends: 1120805 [2020-07-07 11:52:50,275 INFO L226 Difference]: Without dead ends: 741908 [2020-07-07 11:52:50,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:52:51,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741908 states. [2020-07-07 11:54:04,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741908 to 741906. [2020-07-07 11:54:04,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 741906 states. [2020-07-07 11:54:06,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741906 states to 741906 states and 1134941 transitions. [2020-07-07 11:54:06,540 INFO L78 Accepts]: Start accepts. Automaton has 741906 states and 1134941 transitions. Word has length 327 [2020-07-07 11:54:06,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:54:06,540 INFO L479 AbstractCegarLoop]: Abstraction has 741906 states and 1134941 transitions. [2020-07-07 11:54:06,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:54:06,540 INFO L276 IsEmpty]: Start isEmpty. Operand 741906 states and 1134941 transitions. [2020-07-07 11:54:06,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-07 11:54:06,744 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:54:06,745 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:54:06,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-07 11:54:06,745 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:54:06,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:54:06,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1259906926, now seen corresponding path program 1 times [2020-07-07 11:54:06,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:54:06,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066902349] [2020-07-07 11:54:06,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:54:06,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:54:07,483 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:54:07,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:54:07,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:54:07,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066902349] [2020-07-07 11:54:07,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:54:07,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:54:07,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055033946] [2020-07-07 11:54:07,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:54:07,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:54:07,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:54:07,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:54:07,561 INFO L87 Difference]: Start difference. First operand 741906 states and 1134941 transitions. Second operand 5 states.