/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 14:09:54,736 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 14:09:54,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 14:09:54,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 14:09:54,776 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 14:09:54,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 14:09:54,780 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 14:09:54,784 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 14:09:54,789 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 14:09:54,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 14:09:54,794 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 14:09:54,795 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 14:09:54,796 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 14:09:54,802 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 14:09:54,803 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 14:09:54,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 14:09:54,810 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 14:09:54,813 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 14:09:54,831 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 14:09:54,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 14:09:54,838 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 14:09:54,843 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 14:09:54,845 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 14:09:54,846 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 14:09:54,849 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 14:09:54,850 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 14:09:54,850 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 14:09:54,851 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 14:09:54,852 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 14:09:54,853 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 14:09:54,854 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 14:09:54,855 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 14:09:54,856 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 14:09:54,857 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 14:09:54,858 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 14:09:54,858 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 14:09:54,859 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 14:09:54,859 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 14:09:54,860 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 14:09:54,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 14:09:54,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 14:09:54,863 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 14:09:54,891 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 14:09:54,891 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 14:09:54,893 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 14:09:54,893 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 14:09:54,893 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 14:09:54,894 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 14:09:54,894 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 14:09:54,894 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 14:09:54,894 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 14:09:54,895 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 14:09:54,895 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 14:09:54,895 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 14:09:54,895 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 14:09:54,895 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 14:09:54,896 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 14:09:54,896 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 14:09:54,896 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 14:09:54,896 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 14:09:54,897 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 14:09:54,897 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 14:09:54,897 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 14:09:54,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 14:09:54,898 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 14:09:54,898 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 14:09:54,898 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 14:09:54,898 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 14:09:54,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 14:09:54,899 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 14:09:54,899 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 14:09:54,899 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 14:09:55,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 14:09:55,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 14:09:55,340 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 14:09:55,342 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 14:09:55,344 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 14:09:55,345 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-29 14:09:55,444 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af1ced6f0/d410565ed8d346f9a0702e684e5df6e1/FLAG095e1f7f7 [2020-10-29 14:09:56,306 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 14:09:56,307 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-29 14:09:56,339 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af1ced6f0/d410565ed8d346f9a0702e684e5df6e1/FLAG095e1f7f7 [2020-10-29 14:09:56,511 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af1ced6f0/d410565ed8d346f9a0702e684e5df6e1 [2020-10-29 14:09:56,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 14:09:56,525 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 14:09:56,529 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 14:09:56,529 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 14:09:56,533 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 14:09:56,534 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 02:09:56" (1/1) ... [2020-10-29 14:09:56,538 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19065848 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:09:56, skipping insertion in model container [2020-10-29 14:09:56,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 02:09:56" (1/1) ... [2020-10-29 14:09:56,547 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 14:09:56,667 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 14:09:57,718 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 14:09:57,733 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 14:09:58,194 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 14:09:58,228 INFO L208 MainTranslator]: Completed translation [2020-10-29 14:09:58,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:09:58 WrapperNode [2020-10-29 14:09:58,230 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 14:09:58,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 14:09:58,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 14:09:58,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 14:09:58,247 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:09:58" (1/1) ... [2020-10-29 14:09:58,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:09:58" (1/1) ... [2020-10-29 14:09:58,299 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:09:58" (1/1) ... [2020-10-29 14:09:58,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:09:58" (1/1) ... [2020-10-29 14:09:58,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:09:58" (1/1) ... [2020-10-29 14:09:58,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:09:58" (1/1) ... [2020-10-29 14:09:58,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:09:58" (1/1) ... [2020-10-29 14:09:58,445 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 14:09:58,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 14:09:58,449 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 14:09:58,449 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 14:09:58,450 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:09:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-29 14:09:58,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 14:09:58,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 14:09:58,530 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 14:09:58,530 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 14:09:58,530 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 14:09:58,531 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 14:09:58,531 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 14:09:58,531 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 14:09:58,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 14:09:58,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 14:09:58,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 14:09:58,531 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 14:09:58,532 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 14:09:58,532 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 14:09:58,532 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 14:09:58,532 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 14:09:58,532 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 14:09:58,532 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 14:09:58,533 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 14:09:58,533 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 14:09:58,533 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 14:09:58,533 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 14:09:58,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 14:09:58,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 14:09:58,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 14:09:58,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 14:09:58,534 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 14:09:58,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 14:10:02,402 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 14:10:02,402 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 14:10:02,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 02:10:02 BoogieIcfgContainer [2020-10-29 14:10:02,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 14:10:02,410 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 14:10:02,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 14:10:02,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 14:10:02,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 02:09:56" (1/3) ... [2020-10-29 14:10:02,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f6d08f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 02:10:02, skipping insertion in model container [2020-10-29 14:10:02,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:09:58" (2/3) ... [2020-10-29 14:10:02,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f6d08f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 02:10:02, skipping insertion in model container [2020-10-29 14:10:02,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 02:10:02" (3/3) ... [2020-10-29 14:10:02,418 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-29 14:10:02,432 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 14:10:02,440 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 14:10:02,454 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 14:10:02,488 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 14:10:02,488 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 14:10:02,489 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 14:10:02,489 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 14:10:02,489 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 14:10:02,489 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 14:10:02,489 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 14:10:02,489 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 14:10:02,523 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states. [2020-10-29 14:10:02,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-29 14:10:02,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:10:02,553 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] [2020-10-29 14:10:02,554 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:10:02,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:10:02,560 INFO L82 PathProgramCache]: Analyzing trace with hash -540047237, now seen corresponding path program 1 times [2020-10-29 14:10:02,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:10:02,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753633911] [2020-10-29 14:10:02,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:10:03,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:10:03,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:04,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:04,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:05,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:05,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:05,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:06,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:06,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:06,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:06,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:07,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:07,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:07,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:07,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:08,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:08,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:10:08,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-29 14:10:08,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 14:10:08,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 14:10:08,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:10:08,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:10:08,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:10:08,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-29 14:10:08,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 214 [2020-10-29 14:10:08,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 14:10:09,980 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-29 14:10:09,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:10:09,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:10:10,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:10,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:10:10,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:10:10,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:10:10,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-29 14:10:10,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:10:10,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:10:10,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:10:10,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:10:10,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:10:10,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:10:10,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:10:10,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753633911] [2020-10-29 14:10:10,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:10:10,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:10:10,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727326300] [2020-10-29 14:10:10,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:10:10,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:10:10,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:10:10,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:10:10,300 INFO L87 Difference]: Start difference. First operand 799 states. Second operand 4 states. [2020-10-29 14:10:11,744 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 314 [2020-10-29 14:10:19,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:10:19,488 INFO L93 Difference]: Finished difference Result 1496 states and 2629 transitions. [2020-10-29 14:10:19,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:10:19,491 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-10-29 14:10:19,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:10:19,532 INFO L225 Difference]: With dead ends: 1496 [2020-10-29 14:10:19,532 INFO L226 Difference]: Without dead ends: 1286 [2020-10-29 14:10:19,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:10:19,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2020-10-29 14:10:19,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1283. [2020-10-29 14:10:19,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1283 states. [2020-10-29 14:10:19,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 2006 transitions. [2020-10-29 14:10:19,727 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 2006 transitions. Word has length 325 [2020-10-29 14:10:19,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:10:19,729 INFO L481 AbstractCegarLoop]: Abstraction has 1283 states and 2006 transitions. [2020-10-29 14:10:19,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:10:19,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 2006 transitions. [2020-10-29 14:10:19,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-29 14:10:19,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:10:19,741 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] [2020-10-29 14:10:19,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 14:10:19,742 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:10:19,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:10:19,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1948349173, now seen corresponding path program 1 times [2020-10-29 14:10:19,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:10:19,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127981973] [2020-10-29 14:10:19,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:10:19,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:10:19,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:20,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:20,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:20,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:21,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:21,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:21,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:21,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:21,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:22,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:22,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:22,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:22,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:22,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:23,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:23,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:24,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:10:24,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-29 14:10:24,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 14:10:24,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-29 14:10:24,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:10:24,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:10:24,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:10:24,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-29 14:10:24,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 221 [2020-10-29 14:10:24,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:10:26,374 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-29 14:10:26,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:10:26,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:10:26,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:26,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:10:26,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:10:26,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:10:26,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-29 14:10:26,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:10:26,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:10:26,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:10:26,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:10:26,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:10:26,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:10:26,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:10:26,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127981973] [2020-10-29 14:10:26,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:10:26,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:10:26,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448548455] [2020-10-29 14:10:26,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:10:26,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:10:26,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:10:26,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:10:26,739 INFO L87 Difference]: Start difference. First operand 1283 states and 2006 transitions. Second operand 4 states. [2020-10-29 14:10:28,209 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 314 [2020-10-29 14:10:34,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:10:34,697 INFO L93 Difference]: Finished difference Result 2615 states and 4121 transitions. [2020-10-29 14:10:34,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:10:34,698 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-10-29 14:10:34,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:10:34,714 INFO L225 Difference]: With dead ends: 2615 [2020-10-29 14:10:34,714 INFO L226 Difference]: Without dead ends: 2250 [2020-10-29 14:10:34,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:10:34,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2250 states. [2020-10-29 14:10:34,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2250 to 2247. [2020-10-29 14:10:34,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2247 states. [2020-10-29 14:10:34,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 3508 transitions. [2020-10-29 14:10:34,833 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 3508 transitions. Word has length 325 [2020-10-29 14:10:34,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:10:34,836 INFO L481 AbstractCegarLoop]: Abstraction has 2247 states and 3508 transitions. [2020-10-29 14:10:34,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:10:34,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 3508 transitions. [2020-10-29 14:10:34,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-29 14:10:34,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:10:34,852 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] [2020-10-29 14:10:34,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 14:10:34,852 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:10:34,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:10:34,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1821978594, now seen corresponding path program 1 times [2020-10-29 14:10:34,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:10:34,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643625729] [2020-10-29 14:10:34,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:10:35,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:10:35,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:35,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:35,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:35,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:36,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:36,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:36,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:36,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:36,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:37,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:37,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:37,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:37,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:37,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:38,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:38,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:40,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:10:40,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-29 14:10:40,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 14:10:40,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-29 14:10:40,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:10:40,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:10:40,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:10:40,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-10-29 14:10:40,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 228 [2020-10-29 14:10:40,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:10:41,565 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-29 14:10:41,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:10:41,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:10:41,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:41,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:10:41,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:10:41,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:10:41,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 14:10:41,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:10:41,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:10:41,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:10:41,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:10:41,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:10:41,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:10:41,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:10:41,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643625729] [2020-10-29 14:10:41,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:10:41,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:10:41,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828785929] [2020-10-29 14:10:41,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:10:41,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:10:41,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:10:41,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:10:41,925 INFO L87 Difference]: Start difference. First operand 2247 states and 3508 transitions. Second operand 4 states. [2020-10-29 14:10:43,452 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification that was a NOOP. DAG size: 314 [2020-10-29 14:10:49,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:10:49,687 INFO L93 Difference]: Finished difference Result 4825 states and 7596 transitions. [2020-10-29 14:10:49,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:10:49,688 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-10-29 14:10:49,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:10:49,711 INFO L225 Difference]: With dead ends: 4825 [2020-10-29 14:10:49,712 INFO L226 Difference]: Without dead ends: 4142 [2020-10-29 14:10:49,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:10:49,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4142 states. [2020-10-29 14:10:49,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4142 to 4139. [2020-10-29 14:10:49,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4139 states. [2020-10-29 14:10:49,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 6448 transitions. [2020-10-29 14:10:49,870 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 6448 transitions. Word has length 325 [2020-10-29 14:10:49,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:10:49,871 INFO L481 AbstractCegarLoop]: Abstraction has 4139 states and 6448 transitions. [2020-10-29 14:10:49,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:10:49,871 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 6448 transitions. [2020-10-29 14:10:49,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-29 14:10:49,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:10:49,884 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] [2020-10-29 14:10:49,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 14:10:49,885 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:10:49,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:10:49,885 INFO L82 PathProgramCache]: Analyzing trace with hash 479714806, now seen corresponding path program 1 times [2020-10-29 14:10:49,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:10:49,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152107118] [2020-10-29 14:10:49,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:10:49,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:10:50,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:50,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:50,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:50,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:50,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:51,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:51,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:51,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:51,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:51,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:51,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:52,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:52,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:52,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:52,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:52,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:55,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:10:55,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-29 14:10:55,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 14:10:55,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-29 14:10:55,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:10:55,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:10:55,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:10:55,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-29 14:10:55,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 235 [2020-10-29 14:10:55,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:10:56,565 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-29 14:10:56,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:10:56,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:10:56,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:56,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:10:56,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:10:56,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:10:56,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 14:10:56,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:10:56,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:10:56,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:10:56,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:10:56,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:10:56,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:10:56,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:10:56,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152107118] [2020-10-29 14:10:56,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:10:56,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:10:56,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964878949] [2020-10-29 14:10:56,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:10:56,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:10:56,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:10:56,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:10:56,821 INFO L87 Difference]: Start difference. First operand 4139 states and 6448 transitions. Second operand 4 states. [2020-10-29 14:10:58,310 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 314 [2020-10-29 14:11:04,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:11:04,494 INFO L93 Difference]: Finished difference Result 9129 states and 14344 transitions. [2020-10-29 14:11:04,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:11:04,495 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-10-29 14:11:04,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:11:04,538 INFO L225 Difference]: With dead ends: 9129 [2020-10-29 14:11:04,539 INFO L226 Difference]: Without dead ends: 7854 [2020-10-29 14:11:04,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:11:04,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7854 states. [2020-10-29 14:11:04,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7854 to 7851. [2020-10-29 14:11:04,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7851 states. [2020-10-29 14:11:04,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7851 states to 7851 states and 12200 transitions. [2020-10-29 14:11:04,827 INFO L78 Accepts]: Start accepts. Automaton has 7851 states and 12200 transitions. Word has length 325 [2020-10-29 14:11:04,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:11:04,828 INFO L481 AbstractCegarLoop]: Abstraction has 7851 states and 12200 transitions. [2020-10-29 14:11:04,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:11:04,828 INFO L276 IsEmpty]: Start isEmpty. Operand 7851 states and 12200 transitions. [2020-10-29 14:11:04,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-29 14:11:04,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:11:04,847 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] [2020-10-29 14:11:04,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 14:11:04,852 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:11:04,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:11:04,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1772496259, now seen corresponding path program 1 times [2020-10-29 14:11:04,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:11:04,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747254280] [2020-10-29 14:11:04,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:11:05,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:11:05,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:05,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:05,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:05,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:06,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:06,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:06,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:06,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:06,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:06,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:07,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:07,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:07,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:07,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:10,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:11:10,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-29 14:11:10,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 14:11:10,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-29 14:11:10,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:11:10,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:11:10,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:11:10,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:11:10,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 175 [2020-10-29 14:11:10,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:11:11,952 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-29 14:11:11,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:11:11,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:11:11,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:11,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:11:11,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:11:11,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:11:11,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-29 14:11:11,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:11:11,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:11:11,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:11:11,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:11:11,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:11:11,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:11:12,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:11:12,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747254280] [2020-10-29 14:11:12,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:11:12,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:11:12,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788965069] [2020-10-29 14:11:12,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:11:12,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:11:12,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:11:12,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:11:12,199 INFO L87 Difference]: Start difference. First operand 7851 states and 12200 transitions. Second operand 5 states. [2020-10-29 14:11:22,308 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification that was a NOOP. DAG size: 319 [2020-10-29 14:11:25,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:11:25,229 INFO L93 Difference]: Finished difference Result 23205 states and 36018 transitions. [2020-10-29 14:11:25,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:11:25,230 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 325 [2020-10-29 14:11:25,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:11:25,313 INFO L225 Difference]: With dead ends: 23205 [2020-10-29 14:11:25,314 INFO L226 Difference]: Without dead ends: 15387 [2020-10-29 14:11:25,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:11:25,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15387 states. [2020-10-29 14:11:26,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15387 to 15384. [2020-10-29 14:11:26,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15384 states. [2020-10-29 14:11:26,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15384 states to 15384 states and 23767 transitions. [2020-10-29 14:11:26,215 INFO L78 Accepts]: Start accepts. Automaton has 15384 states and 23767 transitions. Word has length 325 [2020-10-29 14:11:26,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:11:26,216 INFO L481 AbstractCegarLoop]: Abstraction has 15384 states and 23767 transitions. [2020-10-29 14:11:26,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:11:26,216 INFO L276 IsEmpty]: Start isEmpty. Operand 15384 states and 23767 transitions. [2020-10-29 14:11:26,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-29 14:11:26,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:11:26,249 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] [2020-10-29 14:11:26,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 14:11:26,249 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:11:26,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:11:26,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1038869709, now seen corresponding path program 1 times [2020-10-29 14:11:26,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:11:26,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577008826] [2020-10-29 14:11:26,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:11:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:11:26,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:26,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:26,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:26,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:27,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:27,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:27,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:27,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:27,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:27,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:28,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:28,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:28,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:28,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:28,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:31,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:11:31,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 335 [2020-10-29 14:11:31,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 14:11:31,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-29 14:11:31,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:11:31,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:11:31,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:11:31,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 14:11:31,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-29 14:11:31,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:11:32,811 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-29 14:11:32,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:11:32,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:11:32,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:32,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:11:32,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:11:32,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:11:32,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 14:11:32,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:11:32,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:11:32,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:11:32,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:11:32,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:11:32,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:11:32,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:11:32,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577008826] [2020-10-29 14:11:32,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:11:32,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:11:32,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219584747] [2020-10-29 14:11:32,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:11:32,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:11:32,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:11:32,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:11:32,979 INFO L87 Difference]: Start difference. First operand 15384 states and 23767 transitions. Second operand 4 states. [2020-10-29 14:11:44,537 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification that was a NOOP. DAG size: 318 [2020-10-29 14:11:47,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:11:47,489 INFO L93 Difference]: Finished difference Result 45377 states and 69985 transitions. [2020-10-29 14:11:47,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:11:47,490 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-10-29 14:11:47,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:11:47,559 INFO L225 Difference]: With dead ends: 45377 [2020-10-29 14:11:47,560 INFO L226 Difference]: Without dead ends: 30137 [2020-10-29 14:11:47,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:11:47,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30137 states. [2020-10-29 14:11:48,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30137 to 30134. [2020-10-29 14:11:48,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30134 states. [2020-10-29 14:11:48,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30134 states to 30134 states and 46262 transitions. [2020-10-29 14:11:48,890 INFO L78 Accepts]: Start accepts. Automaton has 30134 states and 46262 transitions. Word has length 327 [2020-10-29 14:11:48,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:11:48,890 INFO L481 AbstractCegarLoop]: Abstraction has 30134 states and 46262 transitions. [2020-10-29 14:11:48,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:11:48,891 INFO L276 IsEmpty]: Start isEmpty. Operand 30134 states and 46262 transitions. [2020-10-29 14:11:48,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-29 14:11:48,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:11:48,945 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] [2020-10-29 14:11:48,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 14:11:48,946 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:11:48,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:11:48,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1798597464, now seen corresponding path program 1 times [2020-10-29 14:11:48,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:11:48,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854825594] [2020-10-29 14:11:48,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:11:48,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:11:49,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:49,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:49,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:49,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:49,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:49,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:49,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:49,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:49,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:50,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:50,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:50,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:50,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:50,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:54,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:11:54,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 335 [2020-10-29 14:11:54,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 14:11:54,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-29 14:11:54,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:11:54,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:11:54,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:11:54,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:11:54,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 178 [2020-10-29 14:11:54,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:11:55,635 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-29 14:11:55,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:11:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:11:55,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:55,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:11:55,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:11:55,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:11:55,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 14:11:55,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:11:55,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:11:55,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:11:55,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:11:55,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:11:55,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:11:55,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:11:55,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854825594] [2020-10-29 14:11:55,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:11:55,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:11:55,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749110471] [2020-10-29 14:11:55,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:11:55,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:11:55,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:11:55,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:11:55,823 INFO L87 Difference]: Start difference. First operand 30134 states and 46262 transitions. Second operand 5 states. [2020-10-29 14:12:06,919 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification that was a NOOP. DAG size: 319 [2020-10-29 14:12:10,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:12:10,537 INFO L93 Difference]: Finished difference Result 89008 states and 136422 transitions. [2020-10-29 14:12:10,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:12:10,538 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 327 [2020-10-29 14:12:10,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:12:10,683 INFO L225 Difference]: With dead ends: 89008 [2020-10-29 14:12:10,683 INFO L226 Difference]: Without dead ends: 58985 [2020-10-29 14:12:10,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:12:10,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58985 states. [2020-10-29 14:12:13,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58985 to 58982. [2020-10-29 14:12:13,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58982 states. [2020-10-29 14:12:13,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58982 states to 58982 states and 89918 transitions. [2020-10-29 14:12:13,866 INFO L78 Accepts]: Start accepts. Automaton has 58982 states and 89918 transitions. Word has length 327 [2020-10-29 14:12:13,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:12:13,867 INFO L481 AbstractCegarLoop]: Abstraction has 58982 states and 89918 transitions. [2020-10-29 14:12:13,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:12:13,867 INFO L276 IsEmpty]: Start isEmpty. Operand 58982 states and 89918 transitions. [2020-10-29 14:12:13,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-10-29 14:12:13,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:12:13,929 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:12:13,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 14:12:13,929 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:12:13,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:12:13,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1014790693, now seen corresponding path program 1 times [2020-10-29 14:12:13,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:12:13,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459990259] [2020-10-29 14:12:13,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:12:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:12:13,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:13,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:14,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:14,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:14,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:14,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:14,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:14,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:14,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:14,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:14,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:14,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:15,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:15,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:18,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:12:18,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 337 [2020-10-29 14:12:18,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 14:12:18,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-29 14:12:18,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:12:18,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:12:18,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:12:18,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 14:12:18,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 177 [2020-10-29 14:12:18,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:12:20,473 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-29 14:12:20,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:12:20,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:12:20,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:20,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:12:20,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:12:20,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:12:20,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 14:12:20,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:12:20,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:12:20,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:12:20,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:12:20,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:12:20,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:12:20,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:12:20,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459990259] [2020-10-29 14:12:20,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:12:20,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:12:20,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523543260] [2020-10-29 14:12:20,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:12:20,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:12:20,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:12:20,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:12:20,653 INFO L87 Difference]: Start difference. First operand 58982 states and 89918 transitions. Second operand 4 states. [2020-10-29 14:12:34,750 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification that was a NOOP. DAG size: 318 [2020-10-29 14:12:38,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:12:38,859 INFO L93 Difference]: Finished difference Result 173996 states and 264734 transitions. [2020-10-29 14:12:38,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:12:38,860 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 329 [2020-10-29 14:12:38,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:12:39,048 INFO L225 Difference]: With dead ends: 173996 [2020-10-29 14:12:39,048 INFO L226 Difference]: Without dead ends: 115381 [2020-10-29 14:12:39,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:12:39,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115381 states. [2020-10-29 14:12:45,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115381 to 115378. [2020-10-29 14:12:45,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115378 states. [2020-10-29 14:12:45,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115378 states to 115378 states and 174574 transitions. [2020-10-29 14:12:45,261 INFO L78 Accepts]: Start accepts. Automaton has 115378 states and 174574 transitions. Word has length 329 [2020-10-29 14:12:45,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:12:45,261 INFO L481 AbstractCegarLoop]: Abstraction has 115378 states and 174574 transitions. [2020-10-29 14:12:45,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:12:45,261 INFO L276 IsEmpty]: Start isEmpty. Operand 115378 states and 174574 transitions. [2020-10-29 14:12:45,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-10-29 14:12:45,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:12:45,371 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, 1] [2020-10-29 14:12:45,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 14:12:45,372 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:12:45,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:12:45,372 INFO L82 PathProgramCache]: Analyzing trace with hash 649293942, now seen corresponding path program 1 times [2020-10-29 14:12:45,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:12:45,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006569585] [2020-10-29 14:12:45,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:12:45,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:12:45,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:45,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:45,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:46,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:46,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:46,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:46,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:47,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:47,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:47,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:47,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:47,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:47,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:47,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:49,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:49,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:49,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:49,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:50,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:12:50,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 337 [2020-10-29 14:12:50,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-29 14:12:50,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-29 14:12:50,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:12:50,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:12:50,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:12:50,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:12:50,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-29 14:12:50,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:12:52,038 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-29 14:12:52,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:12:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:12:52,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:52,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:12:52,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:12:52,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:12:52,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 14:12:52,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:12:52,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:12:52,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:12:52,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:12:52,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:12:52,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:12:52,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:12:52,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006569585] [2020-10-29 14:12:52,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:12:52,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:12:52,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248960361] [2020-10-29 14:12:52,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:12:52,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:12:52,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:12:52,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:12:52,210 INFO L87 Difference]: Start difference. First operand 115378 states and 174574 transitions. Second operand 5 states. [2020-10-29 14:13:08,579 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification that was a NOOP. DAG size: 319 [2020-10-29 14:13:14,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:13:14,805 INFO L93 Difference]: Finished difference Result 340664 states and 514494 transitions. [2020-10-29 14:13:14,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:13:14,806 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 329 [2020-10-29 14:13:14,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:13:15,148 INFO L225 Difference]: With dead ends: 340664 [2020-10-29 14:13:15,148 INFO L226 Difference]: Without dead ends: 225749 [2020-10-29 14:13:15,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:13:15,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225749 states. [2020-10-29 14:13:26,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225749 to 225746. [2020-10-29 14:13:26,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225746 states. [2020-10-29 14:13:27,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225746 states to 225746 states and 339066 transitions. [2020-10-29 14:13:27,678 INFO L78 Accepts]: Start accepts. Automaton has 225746 states and 339066 transitions. Word has length 329 [2020-10-29 14:13:27,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:13:27,678 INFO L481 AbstractCegarLoop]: Abstraction has 225746 states and 339066 transitions. [2020-10-29 14:13:27,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:13:27,679 INFO L276 IsEmpty]: Start isEmpty. Operand 225746 states and 339066 transitions. [2020-10-29 14:13:27,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-29 14:13:27,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:13:27,855 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, 1, 1, 1] [2020-10-29 14:13:27,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 14:13:27,855 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:13:27,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:13:27,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1169897374, now seen corresponding path program 1 times [2020-10-29 14:13:27,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:13:27,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389352244] [2020-10-29 14:13:27,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:13:28,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:13:28,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:13:28,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:13:28,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:13:28,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:13:28,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:13:28,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:13:28,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:13:29,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:13:29,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:13:29,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:13:29,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:13:29,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:13:29,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:13:29,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:13:29,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:13:29,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking...