/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:16:54,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:16:54,245 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:16:54,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:16:54,296 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:16:54,303 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:16:54,305 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:16:54,310 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:16:54,313 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:16:54,320 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:16:54,321 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:16:54,322 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:16:54,323 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:16:54,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:16:54,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:16:54,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:16:54,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:16:54,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:16:54,342 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:16:54,350 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:16:54,352 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:16:54,354 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:16:54,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:16:54,359 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:16:54,374 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:16:54,375 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:16:54,375 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:16:54,377 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:16:54,378 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:16:54,379 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:16:54,379 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:16:54,380 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:16:54,382 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:16:54,383 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:16:54,384 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:16:54,384 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:16:54,385 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:16:54,385 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:16:54,386 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:16:54,386 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:16:54,387 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:16:54,395 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 [2020-10-28 18:16:54,441 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:16:54,442 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:16:54,443 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:16:54,443 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:16:54,443 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:16:54,444 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:16:54,444 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:16:54,444 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:16:54,444 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:16:54,445 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:16:54,445 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:16:54,445 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:16:54,445 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:16:54,445 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:16:54,446 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:16:54,446 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:16:54,446 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:16:54,446 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:16:54,446 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:16:54,447 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:16:54,447 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:16:54,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:16:54,447 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:16:54,447 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:16:54,448 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:16:54,448 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:16:54,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:16:54,448 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:16:54,448 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:16:54,448 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:16:54,819 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:16:54,849 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:16:54,852 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:16:54,853 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:16:54,854 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:16:54,855 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 18:16:54,928 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/38c10a0b7/63a41dbe8f3e4d1891ec22ad25f1f6a0/FLAG64e50b1cc [2020-10-28 18:16:55,655 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:16:55,656 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 18:16:55,679 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/38c10a0b7/63a41dbe8f3e4d1891ec22ad25f1f6a0/FLAG64e50b1cc [2020-10-28 18:16:55,929 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/38c10a0b7/63a41dbe8f3e4d1891ec22ad25f1f6a0 [2020-10-28 18:16:55,936 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:16:55,944 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:16:55,949 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:16:55,949 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:16:55,953 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:16:55,954 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:16:55" (1/1) ... [2020-10-28 18:16:55,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cc337c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:16:55, skipping insertion in model container [2020-10-28 18:16:55,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:16:55" (1/1) ... [2020-10-28 18:16:55,974 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:16:56,061 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:16:56,554 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:16:56,590 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:16:56,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:16:56,821 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:16:56,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:16:56 WrapperNode [2020-10-28 18:16:56,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:16:56,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:16:56,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:16:56,826 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:16:56,841 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:16:56" (1/1) ... [2020-10-28 18:16:56,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:16:56" (1/1) ... [2020-10-28 18:16:56,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:16:56" (1/1) ... [2020-10-28 18:16:56,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:16:56" (1/1) ... [2020-10-28 18:16:56,958 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:16:56" (1/1) ... [2020-10-28 18:16:56,991 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:16:56" (1/1) ... [2020-10-28 18:16:56,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:16:56" (1/1) ... [2020-10-28 18:16:57,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:16:57,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:16:57,008 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:16:57,008 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:16:57,009 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:16:56" (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 [2020-10-28 18:16:57,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:16:57,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:16:57,095 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:16:57,096 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:16:57,096 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:16:57,097 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:16:57,097 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:16:57,097 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:16:57,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:16:57,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:16:57,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:16:57,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:16:57,099 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:16:57,099 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:16:57,100 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:16:57,101 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:16:57,101 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:16:57,101 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:16:57,101 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:16:57,101 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:16:57,102 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:16:57,102 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:16:57,103 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:16:57,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:16:57,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:16:57,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:16:57,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:16:57,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:16:57,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:16:58,442 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:16:58,443 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:16:58,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:16:58 BoogieIcfgContainer [2020-10-28 18:16:58,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:16:58,448 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:16:58,448 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:16:58,451 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:16:58,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:16:55" (1/3) ... [2020-10-28 18:16:58,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@731d64fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:16:58, skipping insertion in model container [2020-10-28 18:16:58,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:16:56" (2/3) ... [2020-10-28 18:16:58,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@731d64fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:16:58, skipping insertion in model container [2020-10-28 18:16:58,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:16:58" (3/3) ... [2020-10-28 18:16:58,455 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 18:16:58,467 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:16:58,473 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:16:58,487 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:16:58,517 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:16:58,517 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:16:58,518 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:16:58,518 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:16:58,518 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:16:58,518 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:16:58,518 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:16:58,518 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:16:58,544 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states. [2020-10-28 18:16:58,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 18:16:58,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:16:58,562 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] [2020-10-28 18:16:58,563 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:16:58,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:16:58,569 INFO L82 PathProgramCache]: Analyzing trace with hash -655812944, now seen corresponding path program 1 times [2020-10-28 18:16:58,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:16:58,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450517093] [2020-10-28 18:16:58,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:16:59,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:59,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:59,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:00,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:01,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:01,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:04,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:04,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 18:17:04,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:17:04,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-28 18:17:04,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:04,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:04,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:17:04,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-28 18:17:04,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 18:17:04,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 18:17:04,824 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:17:04,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:17:04,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:04,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:04,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:04,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:17:04,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:17:04,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 18:17:04,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:04,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:04,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:17:04,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:17:04,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:17:04,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:17:04,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:17:04,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450517093] [2020-10-28 18:17:04,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:17:04,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:17:04,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733239907] [2020-10-28 18:17:04,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:17:04,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:17:04,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:17:04,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:17:04,987 INFO L87 Difference]: Start difference. First operand 335 states. Second operand 4 states. [2020-10-28 18:17:05,602 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification that was a NOOP. DAG size: 281 [2020-10-28 18:17:07,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:17:07,849 INFO L93 Difference]: Finished difference Result 604 states and 1040 transitions. [2020-10-28 18:17:07,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:17:07,851 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-10-28 18:17:07,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:17:07,867 INFO L225 Difference]: With dead ends: 604 [2020-10-28 18:17:07,867 INFO L226 Difference]: Without dead ends: 454 [2020-10-28 18:17:07,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:17:07,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2020-10-28 18:17:07,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 450. [2020-10-28 18:17:07,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-10-28 18:17:07,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 747 transitions. [2020-10-28 18:17:07,964 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 747 transitions. Word has length 115 [2020-10-28 18:17:07,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:17:07,967 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 747 transitions. [2020-10-28 18:17:07,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:17:07,967 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 747 transitions. [2020-10-28 18:17:07,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-28 18:17:07,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:17:07,978 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] [2020-10-28 18:17:07,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:17:07,979 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:17:07,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:17:07,981 INFO L82 PathProgramCache]: Analyzing trace with hash 218164955, now seen corresponding path program 1 times [2020-10-28 18:17:07,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:17:07,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848757368] [2020-10-28 18:17:07,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:17:08,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:08,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:08,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:08,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:09,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:09,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:10,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:10,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:13,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:13,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-28 18:17:13,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:17:13,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-28 18:17:13,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:13,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:13,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:17:13,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:17:13,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 18:17:13,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:17:13,756 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:17:13,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:17:13,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:13,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:13,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:13,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:17:13,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:17:13,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 18:17:13,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:13,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:13,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:17:13,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:17:13,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:17:13,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:13,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:17:13,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848757368] [2020-10-28 18:17:13,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:17:13,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:17:13,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723605046] [2020-10-28 18:17:13,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:17:13,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:17:13,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:17:13,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:17:13,872 INFO L87 Difference]: Start difference. First operand 450 states and 747 transitions. Second operand 5 states. [2020-10-28 18:17:16,657 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-28 18:17:16,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:17:16,786 INFO L93 Difference]: Finished difference Result 1282 states and 2126 transitions. [2020-10-28 18:17:16,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:17:16,788 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2020-10-28 18:17:16,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:17:16,798 INFO L225 Difference]: With dead ends: 1282 [2020-10-28 18:17:16,798 INFO L226 Difference]: Without dead ends: 867 [2020-10-28 18:17:16,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:17:16,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2020-10-28 18:17:16,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 864. [2020-10-28 18:17:16,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 864 states. [2020-10-28 18:17:16,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1427 transitions. [2020-10-28 18:17:16,896 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1427 transitions. Word has length 118 [2020-10-28 18:17:16,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:17:16,897 INFO L481 AbstractCegarLoop]: Abstraction has 864 states and 1427 transitions. [2020-10-28 18:17:16,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:17:16,897 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1427 transitions. [2020-10-28 18:17:16,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-28 18:17:16,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:17:16,905 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] [2020-10-28 18:17:16,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:17:16,905 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:17:16,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:17:16,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1567456017, now seen corresponding path program 1 times [2020-10-28 18:17:16,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:17:16,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915781239] [2020-10-28 18:17:16,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:17:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:17,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:17,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:17,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:17,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:17,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:20,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:20,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:21,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:21,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:21,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-28 18:17:21,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:17:21,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 18:17:21,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:21,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:21,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:17:21,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:17:21,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-28 18:17:21,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:22,525 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:17:22,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:17:22,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:22,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:22,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:22,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:17:22,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:17:22,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:17:22,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:22,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:22,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:17:22,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:17:22,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:17:22,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:17:22,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915781239] [2020-10-28 18:17:22,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:17:22,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:17:22,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10957026] [2020-10-28 18:17:22,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:17:22,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:17:22,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:17:22,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:17:22,626 INFO L87 Difference]: Start difference. First operand 864 states and 1427 transitions. Second operand 5 states. [2020-10-28 18:17:25,199 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-28 18:17:25,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:17:25,320 INFO L93 Difference]: Finished difference Result 2468 states and 4066 transitions. [2020-10-28 18:17:25,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:17:25,321 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 120 [2020-10-28 18:17:25,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:17:25,336 INFO L225 Difference]: With dead ends: 2468 [2020-10-28 18:17:25,336 INFO L226 Difference]: Without dead ends: 1669 [2020-10-28 18:17:25,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:17:25,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2020-10-28 18:17:25,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1666. [2020-10-28 18:17:25,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1666 states. [2020-10-28 18:17:25,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 2733 transitions. [2020-10-28 18:17:25,458 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 2733 transitions. Word has length 120 [2020-10-28 18:17:25,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:17:25,460 INFO L481 AbstractCegarLoop]: Abstraction has 1666 states and 2733 transitions. [2020-10-28 18:17:25,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:17:25,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 2733 transitions. [2020-10-28 18:17:25,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-28 18:17:25,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:17:25,469 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] [2020-10-28 18:17:25,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:17:25,469 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:17:25,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:17:25,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1088885358, now seen corresponding path program 1 times [2020-10-28 18:17:25,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:17:25,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819193337] [2020-10-28 18:17:25,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:17:25,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:25,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:25,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:25,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:26,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:26,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:26,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:26,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:30,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:30,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-28 18:17:30,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:17:30,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-28 18:17:30,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:30,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:30,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:17:30,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:17:30,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-28 18:17:30,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:31,304 WARN L193 SmtUtils]: Spent 537.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:17:31,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:17:31,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:31,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:31,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:31,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:17:31,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:17:31,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:17:31,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:31,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:31,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:17:31,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:17:31,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:17:31,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:17:31,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:17:31,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819193337] [2020-10-28 18:17:31,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:17:31,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:17:31,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651681562] [2020-10-28 18:17:31,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:17:31,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:17:31,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:17:31,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:17:31,418 INFO L87 Difference]: Start difference. First operand 1666 states and 2733 transitions. Second operand 5 states. [2020-10-28 18:17:34,528 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-28 18:17:34,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:17:34,698 INFO L93 Difference]: Finished difference Result 4742 states and 7759 transitions. [2020-10-28 18:17:34,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:17:34,698 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 120 [2020-10-28 18:17:34,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:17:34,717 INFO L225 Difference]: With dead ends: 4742 [2020-10-28 18:17:34,717 INFO L226 Difference]: Without dead ends: 3275 [2020-10-28 18:17:34,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:17:34,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3275 states. [2020-10-28 18:17:35,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3275 to 3272. [2020-10-28 18:17:35,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3272 states. [2020-10-28 18:17:35,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3272 states to 3272 states and 5346 transitions. [2020-10-28 18:17:35,057 INFO L78 Accepts]: Start accepts. Automaton has 3272 states and 5346 transitions. Word has length 120 [2020-10-28 18:17:35,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:17:35,058 INFO L481 AbstractCegarLoop]: Abstraction has 3272 states and 5346 transitions. [2020-10-28 18:17:35,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:17:35,058 INFO L276 IsEmpty]: Start isEmpty. Operand 3272 states and 5346 transitions. [2020-10-28 18:17:35,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-28 18:17:35,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:17:35,066 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] [2020-10-28 18:17:35,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:17:35,066 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:17:35,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:17:35,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1322661421, now seen corresponding path program 1 times [2020-10-28 18:17:35,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:17:35,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667834074] [2020-10-28 18:17:35,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:17:35,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:35,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:35,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:35,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:35,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:35,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:35,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:39,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:40,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:40,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 18:17:40,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:17:40,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 18:17:40,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:40,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:40,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:17:40,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:17:40,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 18:17:40,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:17:40,691 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:17:40,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:17:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:40,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:40,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:40,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:17:40,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:17:40,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:17:40,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:40,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:40,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:17:40,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:17:40,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:17:40,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:40,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:17:40,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667834074] [2020-10-28 18:17:40,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:17:40,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:17:40,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999981858] [2020-10-28 18:17:40,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:17:40,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:17:40,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:17:40,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:17:40,786 INFO L87 Difference]: Start difference. First operand 3272 states and 5346 transitions. Second operand 5 states. [2020-10-28 18:17:43,653 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-28 18:17:43,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:17:43,837 INFO L93 Difference]: Finished difference Result 9510 states and 15508 transitions. [2020-10-28 18:17:43,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:17:43,839 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2020-10-28 18:17:43,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:17:43,873 INFO L225 Difference]: With dead ends: 9510 [2020-10-28 18:17:43,873 INFO L226 Difference]: Without dead ends: 6357 [2020-10-28 18:17:43,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:17:43,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6357 states. [2020-10-28 18:17:44,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6357 to 6354. [2020-10-28 18:17:44,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6354 states. [2020-10-28 18:17:44,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6354 states to 6354 states and 10308 transitions. [2020-10-28 18:17:44,379 INFO L78 Accepts]: Start accepts. Automaton has 6354 states and 10308 transitions. Word has length 121 [2020-10-28 18:17:44,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:17:44,380 INFO L481 AbstractCegarLoop]: Abstraction has 6354 states and 10308 transitions. [2020-10-28 18:17:44,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:17:44,380 INFO L276 IsEmpty]: Start isEmpty. Operand 6354 states and 10308 transitions. [2020-10-28 18:17:44,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-28 18:17:44,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:17:44,394 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] [2020-10-28 18:17:44,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:17:44,394 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:17:44,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:17:44,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1086352798, now seen corresponding path program 1 times [2020-10-28 18:17:44,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:17:44,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627729812] [2020-10-28 18:17:44,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:17:44,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:44,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:44,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:44,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:44,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:44,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:46,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:49,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:49,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-28 18:17:49,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:17:49,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 18:17:49,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:49,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:49,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:17:49,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:17:49,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-28 18:17:49,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:50,018 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:17:50,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:17:50,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:50,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:50,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:50,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:17:50,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:17:50,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 18:17:50,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:50,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:50,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:17:50,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:17:50,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:17:50,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:50,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:17:50,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627729812] [2020-10-28 18:17:50,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:17:50,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:17:50,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654489021] [2020-10-28 18:17:50,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:17:50,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:17:50,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:17:50,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:17:50,117 INFO L87 Difference]: Start difference. First operand 6354 states and 10308 transitions. Second operand 5 states. [2020-10-28 18:17:53,049 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-28 18:17:53,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:17:53,305 INFO L93 Difference]: Finished difference Result 18367 states and 29775 transitions. [2020-10-28 18:17:53,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:17:53,306 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 122 [2020-10-28 18:17:53,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:17:53,371 INFO L225 Difference]: With dead ends: 18367 [2020-10-28 18:17:53,371 INFO L226 Difference]: Without dead ends: 12040 [2020-10-28 18:17:53,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:17:53,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12040 states. [2020-10-28 18:17:54,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12040 to 12037. [2020-10-28 18:17:54,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12037 states. [2020-10-28 18:17:54,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12037 states to 12037 states and 19411 transitions. [2020-10-28 18:17:54,289 INFO L78 Accepts]: Start accepts. Automaton has 12037 states and 19411 transitions. Word has length 122 [2020-10-28 18:17:54,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:17:54,289 INFO L481 AbstractCegarLoop]: Abstraction has 12037 states and 19411 transitions. [2020-10-28 18:17:54,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:17:54,290 INFO L276 IsEmpty]: Start isEmpty. Operand 12037 states and 19411 transitions. [2020-10-28 18:17:54,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-28 18:17:54,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:17:54,314 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] [2020-10-28 18:17:54,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:17:54,315 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:17:54,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:17:54,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1945204996, now seen corresponding path program 1 times [2020-10-28 18:17:54,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:17:54,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293400491] [2020-10-28 18:17:54,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:17:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:54,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:54,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:54,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:55,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:55,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:55,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:55,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:59,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:59,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-28 18:17:59,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:17:59,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 18:17:59,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:59,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:59,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:17:59,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:17:59,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-28 18:17:59,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:59,957 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:17:59,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:17:59,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:59,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:59,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:59,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:17:59,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:17:59,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:17:59,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:59,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:59,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:17:59,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:17:59,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:17:59,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:18:00,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293400491] [2020-10-28 18:18:00,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:18:00,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:18:00,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897231369] [2020-10-28 18:18:00,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:18:00,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:18:00,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:18:00,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:18:00,061 INFO L87 Difference]: Start difference. First operand 12037 states and 19411 transitions. Second operand 5 states. [2020-10-28 18:18:03,656 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-28 18:18:04,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:18:04,247 INFO L93 Difference]: Finished difference Result 34091 states and 54798 transitions. [2020-10-28 18:18:04,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:18:04,248 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 122 [2020-10-28 18:18:04,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:18:04,302 INFO L225 Difference]: With dead ends: 34091 [2020-10-28 18:18:04,302 INFO L226 Difference]: Without dead ends: 23410 [2020-10-28 18:18:04,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:18:04,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23410 states. [2020-10-28 18:18:05,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23410 to 23407. [2020-10-28 18:18:05,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23407 states. [2020-10-28 18:18:05,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23407 states to 23407 states and 37506 transitions. [2020-10-28 18:18:05,931 INFO L78 Accepts]: Start accepts. Automaton has 23407 states and 37506 transitions. Word has length 122 [2020-10-28 18:18:05,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:18:05,932 INFO L481 AbstractCegarLoop]: Abstraction has 23407 states and 37506 transitions. [2020-10-28 18:18:05,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:18:05,932 INFO L276 IsEmpty]: Start isEmpty. Operand 23407 states and 37506 transitions. [2020-10-28 18:18:05,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-28 18:18:05,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:18:05,973 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] [2020-10-28 18:18:05,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:18:05,974 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:18:05,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:18:05,974 INFO L82 PathProgramCache]: Analyzing trace with hash 425652581, now seen corresponding path program 1 times [2020-10-28 18:18:05,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:18:05,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833846890] [2020-10-28 18:18:05,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:18:06,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:06,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:06,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:06,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:06,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:06,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:09,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:11,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:11,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-28 18:18:11,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:18:11,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-28 18:18:11,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:11,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:11,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:18:11,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-28 18:18:11,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 18:18:11,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:11,557 WARN L193 SmtUtils]: Spent 466.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:18:11,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:18:11,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:11,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:11,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:11,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:18:11,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:18:11,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:18:11,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:11,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:11,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:18:11,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:18:11,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:18:11,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:11,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:18:11,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833846890] [2020-10-28 18:18:11,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:18:11,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:18:11,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602511002] [2020-10-28 18:18:11,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:18:11,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:18:11,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:18:11,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:18:11,629 INFO L87 Difference]: Start difference. First operand 23407 states and 37506 transitions. Second operand 4 states. [2020-10-28 18:18:12,209 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification that was a NOOP. DAG size: 281 [2020-10-28 18:18:16,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:18:16,268 INFO L93 Difference]: Finished difference Result 51189 states and 83718 transitions. [2020-10-28 18:18:16,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:18:16,269 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2020-10-28 18:18:16,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:18:16,342 INFO L225 Difference]: With dead ends: 51189 [2020-10-28 18:18:16,342 INFO L226 Difference]: Without dead ends: 36754 [2020-10-28 18:18:16,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:18:16,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36754 states. [2020-10-28 18:18:19,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36754 to 36623. [2020-10-28 18:18:19,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36623 states. [2020-10-28 18:18:19,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36623 states to 36623 states and 59234 transitions. [2020-10-28 18:18:19,171 INFO L78 Accepts]: Start accepts. Automaton has 36623 states and 59234 transitions. Word has length 123 [2020-10-28 18:18:19,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:18:19,171 INFO L481 AbstractCegarLoop]: Abstraction has 36623 states and 59234 transitions. [2020-10-28 18:18:19,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:18:19,171 INFO L276 IsEmpty]: Start isEmpty. Operand 36623 states and 59234 transitions. [2020-10-28 18:18:19,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-28 18:18:19,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:18:19,206 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] [2020-10-28 18:18:19,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:18:19,207 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:18:19,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:18:19,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1805950354, now seen corresponding path program 1 times [2020-10-28 18:18:19,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:18:19,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289010432] [2020-10-28 18:18:19,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:18:19,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:19,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:19,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:19,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:19,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:19,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:19,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:20,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:24,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:24,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-28 18:18:24,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:18:24,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 18:18:24,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:24,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:24,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:18:24,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:18:24,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-28 18:18:24,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:24,814 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:18:24,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:18:24,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:24,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:24,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:24,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:18:24,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:18:24,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:18:24,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:24,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:24,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:18:24,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:18:24,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:18:24,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:18:24,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289010432] [2020-10-28 18:18:24,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:18:24,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:18:24,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656224087] [2020-10-28 18:18:24,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:18:24,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:18:24,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:18:24,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:18:24,893 INFO L87 Difference]: Start difference. First operand 36623 states and 59234 transitions. Second operand 5 states. [2020-10-28 18:18:29,730 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-28 18:18:32,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:18:32,790 INFO L93 Difference]: Finished difference Result 106818 states and 172708 transitions. [2020-10-28 18:18:32,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:18:32,791 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 127 [2020-10-28 18:18:32,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:18:32,890 INFO L225 Difference]: With dead ends: 106818 [2020-10-28 18:18:32,890 INFO L226 Difference]: Without dead ends: 71807 [2020-10-28 18:18:32,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:18:33,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71807 states. [2020-10-28 18:18:38,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71807 to 71804. [2020-10-28 18:18:38,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71804 states. [2020-10-28 18:18:38,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71804 states to 71804 states and 115488 transitions. [2020-10-28 18:18:38,726 INFO L78 Accepts]: Start accepts. Automaton has 71804 states and 115488 transitions. Word has length 127 [2020-10-28 18:18:38,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:18:38,726 INFO L481 AbstractCegarLoop]: Abstraction has 71804 states and 115488 transitions. [2020-10-28 18:18:38,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:18:38,726 INFO L276 IsEmpty]: Start isEmpty. Operand 71804 states and 115488 transitions. [2020-10-28 18:18:38,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-28 18:18:38,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:18:38,770 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] [2020-10-28 18:18:38,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:18:38,771 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:18:38,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:18:38,771 INFO L82 PathProgramCache]: Analyzing trace with hash -53603430, now seen corresponding path program 1 times [2020-10-28 18:18:38,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:18:38,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034357524] [2020-10-28 18:18:38,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:18:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:39,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:39,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:39,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:39,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:39,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:39,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:39,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:44,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:44,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-28 18:18:44,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:18:44,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 18:18:44,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:44,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:44,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:18:44,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:18:44,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-28 18:18:44,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:44,533 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:18:44,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:18:44,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:44,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:44,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:44,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:18:44,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:18:44,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:18:44,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:44,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:44,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:18:44,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:18:44,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:18:44,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:44,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:18:44,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034357524] [2020-10-28 18:18:44,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:18:44,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:18:44,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380813641] [2020-10-28 18:18:44,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:18:44,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:18:44,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:18:44,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:18:44,594 INFO L87 Difference]: Start difference. First operand 71804 states and 115488 transitions. Second operand 5 states. [2020-10-28 18:18:51,232 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-28 18:18:58,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:18:58,102 INFO L93 Difference]: Finished difference Result 212576 states and 342016 transitions. [2020-10-28 18:18:58,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:18:58,102 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 129 [2020-10-28 18:18:58,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:18:58,364 INFO L225 Difference]: With dead ends: 212576 [2020-10-28 18:18:58,364 INFO L226 Difference]: Without dead ends: 140902 [2020-10-28 18:18:58,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:18:58,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140902 states. [2020-10-28 18:19:10,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140902 to 140899. [2020-10-28 18:19:10,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140899 states. [2020-10-28 18:19:10,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140899 states to 140899 states and 225634 transitions. [2020-10-28 18:19:10,864 INFO L78 Accepts]: Start accepts. Automaton has 140899 states and 225634 transitions. Word has length 129 [2020-10-28 18:19:10,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:19:10,865 INFO L481 AbstractCegarLoop]: Abstraction has 140899 states and 225634 transitions. [2020-10-28 18:19:10,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:19:10,865 INFO L276 IsEmpty]: Start isEmpty. Operand 140899 states and 225634 transitions. [2020-10-28 18:19:10,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-28 18:19:10,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:19:10,955 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] [2020-10-28 18:19:10,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:19:10,955 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:19:10,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:19:10,956 INFO L82 PathProgramCache]: Analyzing trace with hash -295009325, now seen corresponding path program 1 times [2020-10-28 18:19:10,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:19:10,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586207262] [2020-10-28 18:19:10,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:19:10,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:11,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:11,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:11,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:11,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:11,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:11,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:11,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:15,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:15,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-28 18:19:15,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:19:15,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:19:15,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:15,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:15,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:19:15,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:19:15,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-28 18:19:15,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:19:16,529 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:19:16,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:19:16,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:16,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:16,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:16,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:19:16,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:19:16,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:19:16,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:16,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:16,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:19:16,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:19:16,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:19:16,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:19:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:19:16,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586207262] [2020-10-28 18:19:16,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:19:16,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:19:16,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14331993] [2020-10-28 18:19:16,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:19:16,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:19:16,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:19:16,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:19:16,602 INFO L87 Difference]: Start difference. First operand 140899 states and 225634 transitions. Second operand 5 states. [2020-10-28 18:19:28,859 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-28 18:19:45,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:19:45,130 INFO L93 Difference]: Finished difference Result 409047 states and 654506 transitions. [2020-10-28 18:19:45,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:19:45,131 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 129 [2020-10-28 18:19:45,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:19:45,646 INFO L225 Difference]: With dead ends: 409047 [2020-10-28 18:19:45,646 INFO L226 Difference]: Without dead ends: 275524 [2020-10-28 18:19:45,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:19:45,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275524 states. [2020-10-28 18:20:12,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275524 to 275521. [2020-10-28 18:20:12,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275521 states. [2020-10-28 18:20:13,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275521 states to 275521 states and 438534 transitions. [2020-10-28 18:20:13,380 INFO L78 Accepts]: Start accepts. Automaton has 275521 states and 438534 transitions. Word has length 129 [2020-10-28 18:20:13,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:20:13,380 INFO L481 AbstractCegarLoop]: Abstraction has 275521 states and 438534 transitions. [2020-10-28 18:20:13,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:20:13,380 INFO L276 IsEmpty]: Start isEmpty. Operand 275521 states and 438534 transitions. [2020-10-28 18:20:13,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-28 18:20:13,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:20:13,518 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] [2020-10-28 18:20:13,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:20:13,519 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:20:13,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:20:13,519 INFO L82 PathProgramCache]: Analyzing trace with hash 19920705, now seen corresponding path program 1 times [2020-10-28 18:20:13,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:20:13,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417914504] [2020-10-28 18:20:13,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:20:13,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:20:13,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:13,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:13,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:14,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:14,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:14,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:15,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:18,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:20:18,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-28 18:20:18,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:20:18,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 18:20:18,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:20:18,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:20:18,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:20:18,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:20:18,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 18:20:18,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:20:19,085 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:20:19,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:20:19,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:20:19,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:19,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:20:19,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:20:19,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:20:19,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:20:19,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:20:19,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:20:19,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:20:19,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:20:19,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:20:19,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:20:19,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:20:19,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417914504] [2020-10-28 18:20:19,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:20:19,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:20:19,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945805662] [2020-10-28 18:20:19,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:20:19,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:20:19,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:20:19,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:20:19,176 INFO L87 Difference]: Start difference. First operand 275521 states and 438534 transitions. Second operand 5 states.