/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --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=0.4 --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 -i ../../../trunk/examples/svcomp/array-fpi/sina1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:55:27,960 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:55:27,963 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:55:28,003 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:55:28,004 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:55:28,011 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:55:28,013 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:55:28,016 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:55:28,019 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:55:28,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:55:28,022 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:55:28,023 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:55:28,023 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:55:28,026 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:55:28,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:55:28,030 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:55:28,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:55:28,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:55:28,033 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:55:28,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:55:28,043 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:55:28,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:55:28,045 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:55:28,045 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:55:28,057 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:55:28,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:55:28,059 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:55:28,065 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:55:28,065 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:55:28,066 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:55:28,066 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:55:28,067 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:55:28,067 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:55:28,068 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:55:28,072 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:55:28,072 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:55:28,073 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:55:28,073 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:55:28,073 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:55:28,074 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:55:28,075 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:55:28,076 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 [2020-10-13 23:55:28,110 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:55:28,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:55:28,112 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:55:28,112 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:55:28,112 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:55:28,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:55:28,113 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:55:28,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:55:28,113 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:55:28,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:55:28,114 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:55:28,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:55:28,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:55:28,115 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:55:28,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:55:28,116 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:55:28,116 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:55:28,116 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:55:28,116 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:55:28,116 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:55:28,117 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:55:28,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:55:28,117 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:55:28,117 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:55:28,118 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:55:28,118 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:55:28,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:55:28,118 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:55:28,118 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:55:28,119 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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=0.4;log-additional-information=true;unknown-allowed=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=0.4;log-additional-information=true;unknown-allowed=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=0.4;log-additional-information=true;unknown-allowed=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=0.4;log-additional-information=true;unknown-allowed=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=0.4;log-additional-information=true;unknown-allowed=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=0.4;log-additional-information=true;unknown-allowed=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=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:55:28,395 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:55:28,408 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:55:28,411 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:55:28,412 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:55:28,413 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:55:28,413 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/sina1.c [2020-10-13 23:55:28,471 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77c497c04/cf959cbc4cb548a6a74a4e72aaa9a474/FLAGbd0cf9e49 [2020-10-13 23:55:28,893 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:55:28,893 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/sina1.c [2020-10-13 23:55:28,901 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77c497c04/cf959cbc4cb548a6a74a4e72aaa9a474/FLAGbd0cf9e49 [2020-10-13 23:55:29,296 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77c497c04/cf959cbc4cb548a6a74a4e72aaa9a474 [2020-10-13 23:55:29,304 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:55:29,306 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:55:29,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:55:29,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:55:29,310 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:55:29,313 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:55:29" (1/1) ... [2020-10-13 23:55:29,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b337bef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:55:29, skipping insertion in model container [2020-10-13 23:55:29,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:55:29" (1/1) ... [2020-10-13 23:55:29,327 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:55:29,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:55:29,565 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:55:29,574 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:55:29,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:55:29,605 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:55:29,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:55:29 WrapperNode [2020-10-13 23:55:29,606 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:55:29,606 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:55:29,606 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:55:29,607 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:55:29,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:55:29" (1/1) ... [2020-10-13 23:55:29,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:55:29" (1/1) ... [2020-10-13 23:55:29,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:55:29" (1/1) ... [2020-10-13 23:55:29,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:55:29" (1/1) ... [2020-10-13 23:55:29,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:55:29" (1/1) ... [2020-10-13 23:55:29,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:55:29" (1/1) ... [2020-10-13 23:55:29,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:55:29" (1/1) ... [2020-10-13 23:55:29,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:55:29,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:55:29,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:55:29,725 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:55:29,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:55:29" (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 [2020-10-13 23:55:29,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:55:29,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:55:29,778 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 23:55:29,779 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:55:29,779 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:55:29,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:55:29,779 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 23:55:29,779 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 23:55:29,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:55:29,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:55:29,780 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 23:55:29,780 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:55:29,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:55:29,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 23:55:29,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:55:29,780 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:55:29,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:55:29,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:55:29,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:55:30,034 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:55:30,035 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 23:55:30,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:55:30 BoogieIcfgContainer [2020-10-13 23:55:30,039 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:55:30,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:55:30,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:55:30,043 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:55:30,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:55:29" (1/3) ... [2020-10-13 23:55:30,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41ad18cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:55:30, skipping insertion in model container [2020-10-13 23:55:30,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:55:29" (2/3) ... [2020-10-13 23:55:30,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41ad18cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:55:30, skipping insertion in model container [2020-10-13 23:55:30,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:55:30" (3/3) ... [2020-10-13 23:55:30,046 INFO L109 eAbstractionObserver]: Analyzing ICFG sina1.c [2020-10-13 23:55:30,057 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:55:30,064 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:55:30,078 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:55:30,102 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:55:30,103 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:55:30,103 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:55:30,103 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:55:30,103 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:55:30,104 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:55:30,104 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:55:30,104 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:55:30,121 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-13 23:55:30,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 23:55:30,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:55:30,128 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] [2020-10-13 23:55:30,129 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:55:30,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:55:30,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1314760119, now seen corresponding path program 1 times [2020-10-13 23:55:30,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:55:30,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179166003] [2020-10-13 23:55:30,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:55:30,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:30,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:30,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:30,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:30,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:30,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:30,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:30,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 23:55:30,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:55:30,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 718 [2020-10-13 23:55:30,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:30,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:30,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:30,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 23:55:30,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:30,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 23:55:31,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:55:31,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:31,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:31,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:31,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:55:31,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:31,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 23:55:31,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:31,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:31,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:31,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:31,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:31,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 23:55:31,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:55:31,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:31,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:31,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:31,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:55:31,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:31,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:55:31,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:31,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:31,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:31,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 23:55:31,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:31,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:55:31,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179166003] [2020-10-13 23:55:31,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:55:31,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:55:31,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705380139] [2020-10-13 23:55:31,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:55:31,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:55:31,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:55:31,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:55:31,150 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2020-10-13 23:55:31,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:55:31,281 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2020-10-13 23:55:31,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:55:31,284 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-13 23:55:31,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:55:31,291 INFO L225 Difference]: With dead ends: 58 [2020-10-13 23:55:31,292 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 23:55:31,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:55:31,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 23:55:31,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-13 23:55:31,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 23:55:31,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-13 23:55:31,337 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2020-10-13 23:55:31,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:55:31,338 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-13 23:55:31,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:55:31,338 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-13 23:55:31,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 23:55:31,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:55:31,339 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] [2020-10-13 23:55:31,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:55:31,340 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:55:31,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:55:31,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1901566133, now seen corresponding path program 1 times [2020-10-13 23:55:31,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:55:31,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651101116] [2020-10-13 23:55:31,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:55:31,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:31,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:31,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:31,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:31,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:31,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:31,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 23:55:31,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:55:31,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-10-13 23:55:31,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:31,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:31,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:55:31,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:55:31,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:55:31,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:31,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:55:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:31,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:31,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:31,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:55:31,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:31,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:55:31,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:31,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:31,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:31,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:31,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:31,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:31,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:55:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:31,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:31,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:31,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:55:31,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:31,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:55:31,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:31,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:31,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:55:31,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:31,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:55:31,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:31,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:55:31,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651101116] [2020-10-13 23:55:31,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:55:31,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 23:55:31,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402934743] [2020-10-13 23:55:31,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:55:31,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:55:31,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:55:31,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:55:31,636 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 5 states. [2020-10-13 23:55:31,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:55:31,753 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-10-13 23:55:31,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:55:31,754 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-13 23:55:31,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:55:31,755 INFO L225 Difference]: With dead ends: 46 [2020-10-13 23:55:31,755 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 23:55:31,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:55:31,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 23:55:31,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-13 23:55:31,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 23:55:31,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-13 23:55:31,765 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 22 [2020-10-13 23:55:31,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:55:31,765 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-13 23:55:31,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:55:31,766 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-13 23:55:31,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 23:55:31,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:55:31,767 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] [2020-10-13 23:55:31,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:55:31,767 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:55:31,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:55:31,768 INFO L82 PathProgramCache]: Analyzing trace with hash -69884793, now seen corresponding path program 1 times [2020-10-13 23:55:31,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:55:31,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308802406] [2020-10-13 23:55:31,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:55:31,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:31,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:31,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:32,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:32,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:32,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 23:55:32,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:55:32,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 587 [2020-10-13 23:55:32,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:32,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:32,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:55:32,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:55:32,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 23:55:32,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:32,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:55:32,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:32,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:32,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:32,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:55:32,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:32,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:55:32,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:32,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:32,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:32,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:32,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:32,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:32,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:55:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:32,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:32,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:32,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:55:32,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:32,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:55:32,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:32,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:32,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:32,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:32,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:32,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:32,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:55:32,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308802406] [2020-10-13 23:55:32,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:55:32,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:55:32,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973579998] [2020-10-13 23:55:32,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:55:32,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:55:32,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:55:32,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:55:32,764 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 14 states. [2020-10-13 23:55:34,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:55:34,120 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2020-10-13 23:55:34,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:55:34,123 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-10-13 23:55:34,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:55:34,127 INFO L225 Difference]: With dead ends: 57 [2020-10-13 23:55:34,127 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 23:55:34,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:55:34,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 23:55:34,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-13 23:55:34,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 23:55:34,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-10-13 23:55:34,159 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 26 [2020-10-13 23:55:34,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:55:34,159 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-10-13 23:55:34,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:55:34,159 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-10-13 23:55:34,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 23:55:34,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:55:34,164 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:55:34,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:55:34,165 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:55:34,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:55:34,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1048027141, now seen corresponding path program 2 times [2020-10-13 23:55:34,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:55:34,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092404215] [2020-10-13 23:55:34,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:55:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:34,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:34,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:34,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:34,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 23:55:34,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:55:34,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 350 [2020-10-13 23:55:34,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:34,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:34,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:55:34,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:55:34,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:55:34,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:34,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:55:34,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:34,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:34,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:34,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:55:34,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:34,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:55:34,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:34,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:34,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:34,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:34,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:34,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:34,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:55:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:34,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:34,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:34,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:55:34,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:34,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:55:34,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:34,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:34,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:34,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:34,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:34,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:34,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:55:34,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092404215] [2020-10-13 23:55:34,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:55:34,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:55:34,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425194628] [2020-10-13 23:55:34,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:55:34,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:55:34,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:55:34,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:55:34,634 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 8 states. [2020-10-13 23:55:34,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:55:34,901 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2020-10-13 23:55:34,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:55:34,901 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-13 23:55:34,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:55:34,905 INFO L225 Difference]: With dead ends: 74 [2020-10-13 23:55:34,906 INFO L226 Difference]: Without dead ends: 63 [2020-10-13 23:55:34,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:55:34,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-13 23:55:34,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-13 23:55:34,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 23:55:34,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-13 23:55:34,927 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 28 [2020-10-13 23:55:34,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:55:34,928 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-13 23:55:34,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:55:34,928 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-13 23:55:34,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 23:55:34,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:55:34,930 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:55:34,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:55:34,930 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:55:34,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:55:34,930 INFO L82 PathProgramCache]: Analyzing trace with hash 2071122883, now seen corresponding path program 3 times [2020-10-13 23:55:34,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:55:34,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558756025] [2020-10-13 23:55:34,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:55:34,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:34,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:35,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:35,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:35,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:35,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 23:55:35,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:55:35,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 839 [2020-10-13 23:55:35,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:35,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:35,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:55:35,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:55:35,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 23:55:35,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:36,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:55:36,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:36,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:36,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:36,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:55:36,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:36,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:55:36,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:36,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:36,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:36,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:36,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:36,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 23:55:36,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:55:36,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:36,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:36,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:36,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:55:36,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:36,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:55:36,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:36,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:36,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:36,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:36,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:36,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-13 23:55:36,170 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:55:36,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558756025] [2020-10-13 23:55:36,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:55:36,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:55:36,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21732362] [2020-10-13 23:55:36,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:55:36,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:55:36,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:55:36,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:55:36,173 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 16 states. [2020-10-13 23:55:37,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:55:37,328 INFO L93 Difference]: Finished difference Result 101 states and 114 transitions. [2020-10-13 23:55:37,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:55:37,329 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-10-13 23:55:37,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:55:37,330 INFO L225 Difference]: With dead ends: 101 [2020-10-13 23:55:37,330 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 23:55:37,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:55:37,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 23:55:37,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 54. [2020-10-13 23:55:37,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 23:55:37,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-10-13 23:55:37,353 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 30 [2020-10-13 23:55:37,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:55:37,354 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-10-13 23:55:37,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:55:37,354 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-10-13 23:55:37,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 23:55:37,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:55:37,356 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:55:37,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:55:37,357 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:55:37,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:55:37,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1718620161, now seen corresponding path program 4 times [2020-10-13 23:55:37,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:55:37,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003001048] [2020-10-13 23:55:37,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:55:37,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:37,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:37,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:37,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:38,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:38,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 23:55:38,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:55:38,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 818 [2020-10-13 23:55:38,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:38,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:38,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:55:38,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:55:38,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:55:38,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:38,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:55:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:38,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:38,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:38,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:55:38,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:38,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:55:38,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:38,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:38,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:38,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:38,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:38,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:38,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:55:38,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:38,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:38,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:38,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:55:38,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:38,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:55:38,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:38,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:38,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:38,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:38,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:38,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:38,272 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:55:38,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003001048] [2020-10-13 23:55:38,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:55:38,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:55:38,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993961631] [2020-10-13 23:55:38,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:55:38,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:55:38,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:55:38,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:55:38,275 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 10 states. [2020-10-13 23:55:38,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:55:38,587 INFO L93 Difference]: Finished difference Result 114 states and 128 transitions. [2020-10-13 23:55:38,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:55:38,587 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-13 23:55:38,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:55:38,589 INFO L225 Difference]: With dead ends: 114 [2020-10-13 23:55:38,589 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 23:55:38,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:55:38,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 23:55:38,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2020-10-13 23:55:38,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 23:55:38,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2020-10-13 23:55:38,612 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 32 [2020-10-13 23:55:38,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:55:38,614 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2020-10-13 23:55:38,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:55:38,614 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2020-10-13 23:55:38,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 23:55:38,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:55:38,617 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:55:38,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:55:38,618 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:55:38,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:55:38,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1569644609, now seen corresponding path program 5 times [2020-10-13 23:55:38,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:55:38,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311323242] [2020-10-13 23:55:38,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:55:38,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:38,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:38,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:39,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:39,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 23:55:39,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:55:39,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 639 [2020-10-13 23:55:39,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:39,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:39,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:55:39,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:55:39,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:55:39,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 23:55:39,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:55:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:39,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:39,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:39,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:55:39,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:39,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:55:39,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:39,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:39,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:39,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:39,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:39,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:39,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:55:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:39,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:39,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:39,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:55:39,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:39,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:55:39,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:39,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:39,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:39,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:39,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:39,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:39,380 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:55:39,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311323242] [2020-10-13 23:55:39,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:55:39,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:55:39,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585249574] [2020-10-13 23:55:39,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:55:39,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:55:39,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:55:39,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:55:39,384 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand 10 states. [2020-10-13 23:55:39,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:55:39,753 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2020-10-13 23:55:39,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:55:39,754 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-13 23:55:39,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:55:39,755 INFO L225 Difference]: With dead ends: 84 [2020-10-13 23:55:39,755 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 23:55:39,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:55:39,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 23:55:39,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2020-10-13 23:55:39,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 23:55:39,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-10-13 23:55:39,780 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 32 [2020-10-13 23:55:39,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:55:39,781 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-10-13 23:55:39,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:55:39,782 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-10-13 23:55:39,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 23:55:39,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:55:39,783 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:55:39,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:55:39,783 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:55:39,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:55:39,784 INFO L82 PathProgramCache]: Analyzing trace with hash 834335999, now seen corresponding path program 6 times [2020-10-13 23:55:39,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:55:39,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710051414] [2020-10-13 23:55:39,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:55:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:39,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:40,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:40,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:41,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:41,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 23:55:41,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:55:41,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1257 [2020-10-13 23:55:41,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:41,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:41,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:55:41,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:55:41,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 23:55:41,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:55:41,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:55:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:41,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:41,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:41,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:55:41,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:41,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:55:41,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:41,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:41,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:41,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:41,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:41,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:41,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:55:41,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:41,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:41,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:41,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:55:41,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:41,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:55:41,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:41,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:41,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:41,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:41,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:41,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:41,598 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:55:41,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710051414] [2020-10-13 23:55:41,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:55:41,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:55:41,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846831103] [2020-10-13 23:55:41,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:55:41,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:55:41,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:55:41,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:55:41,601 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 18 states. [2020-10-13 23:55:42,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:55:42,571 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2020-10-13 23:55:42,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:55:42,571 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2020-10-13 23:55:42,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:55:42,572 INFO L225 Difference]: With dead ends: 95 [2020-10-13 23:55:42,572 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 23:55:42,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:55:42,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 23:55:42,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 75. [2020-10-13 23:55:42,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 23:55:42,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2020-10-13 23:55:42,587 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 34 [2020-10-13 23:55:42,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:55:42,588 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2020-10-13 23:55:42,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:55:42,588 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2020-10-13 23:55:42,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 23:55:42,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:55:42,593 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:55:42,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:55:42,593 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:55:42,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:55:42,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1422601667, now seen corresponding path program 7 times [2020-10-13 23:55:42,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:55:42,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559219989] [2020-10-13 23:55:42,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:55:42,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:42,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:42,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:43,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:43,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:43,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 23:55:43,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:55:43,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1094 [2020-10-13 23:55:43,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:43,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:43,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:55:43,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:55:43,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:55:43,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:43,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:55:43,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:43,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:43,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:43,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:55:43,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:43,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:55:43,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:43,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:43,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:43,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:43,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:43,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:43,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:55:43,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:43,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:43,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:43,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:55:43,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:43,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:55:43,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:43,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:43,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:43,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:43,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:43,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:43,812 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:55:43,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559219989] [2020-10-13 23:55:43,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:55:43,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:55:43,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598661540] [2020-10-13 23:55:43,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:55:43,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:55:43,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:55:43,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:55:43,819 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand 12 states. [2020-10-13 23:55:44,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:55:44,224 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2020-10-13 23:55:44,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:55:44,225 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-13 23:55:44,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:55:44,228 INFO L225 Difference]: With dead ends: 128 [2020-10-13 23:55:44,228 INFO L226 Difference]: Without dead ends: 112 [2020-10-13 23:55:44,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:55:44,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-13 23:55:44,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 92. [2020-10-13 23:55:44,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 23:55:44,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2020-10-13 23:55:44,248 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 36 [2020-10-13 23:55:44,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:55:44,248 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2020-10-13 23:55:44,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:55:44,248 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2020-10-13 23:55:44,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 23:55:44,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:55:44,251 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:55:44,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:55:44,251 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:55:44,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:55:44,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1440780925, now seen corresponding path program 8 times [2020-10-13 23:55:44,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:55:44,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970449565] [2020-10-13 23:55:44,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:55:44,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:44,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:44,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:45,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:45,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 23:55:45,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:55:45,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 797 [2020-10-13 23:55:45,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:45,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:45,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:55:45,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:55:45,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:55:45,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:45,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:55:45,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:45,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:45,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:45,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:55:45,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:45,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:55:45,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:45,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:45,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:45,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:45,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:45,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:45,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:55:45,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:45,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:45,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:45,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:55:45,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:45,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:55:45,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:45,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:45,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:45,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:45,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:45,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:45,170 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:55:45,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970449565] [2020-10-13 23:55:45,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:55:45,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:55:45,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26224203] [2020-10-13 23:55:45,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:55:45,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:55:45,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:55:45,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:55:45,173 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand 12 states. [2020-10-13 23:55:45,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:55:45,682 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2020-10-13 23:55:45,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:55:45,682 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-13 23:55:45,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:55:45,683 INFO L225 Difference]: With dead ends: 121 [2020-10-13 23:55:45,683 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 23:55:45,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:55:45,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 23:55:45,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 89. [2020-10-13 23:55:45,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-13 23:55:45,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2020-10-13 23:55:45,708 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 36 [2020-10-13 23:55:45,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:55:45,708 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2020-10-13 23:55:45,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:55:45,709 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2020-10-13 23:55:45,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 23:55:45,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:55:45,709 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:55:45,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:55:45,710 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:55:45,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:55:45,710 INFO L82 PathProgramCache]: Analyzing trace with hash 404839833, now seen corresponding path program 1 times [2020-10-13 23:55:45,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:55:45,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376583098] [2020-10-13 23:55:45,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:55:45,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:45,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:45,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:45,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:46,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:46,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:47,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:47,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:49,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:49,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 23:55:49,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:55:49,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3914 [2020-10-13 23:55:49,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:49,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:49,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:55:49,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:55:49,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 23:55:49,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:49,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:55:49,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:49,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:49,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:49,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:55:49,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:49,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:55:49,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:49,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:49,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:49,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:49,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:49,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:49,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:55:49,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:49,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:49,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:49,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:55:49,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:50,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:55:50,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:50,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:50,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:50,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:50,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:50,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:50,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-13 23:55:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:50,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:50,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:50,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:55:50,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:50,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:55:50,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:50,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:50,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:55:50,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:50,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:55:50,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:50,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:55:50,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376583098] [2020-10-13 23:55:50,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:55:50,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:55:50,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184618016] [2020-10-13 23:55:50,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:55:50,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:55:50,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:55:50,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:55:50,026 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand 18 states. [2020-10-13 23:55:51,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:55:51,161 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2020-10-13 23:55:51,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:55:51,162 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2020-10-13 23:55:51,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:55:51,163 INFO L225 Difference]: With dead ends: 99 [2020-10-13 23:55:51,163 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 23:55:51,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:55:51,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 23:55:51,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 70. [2020-10-13 23:55:51,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 23:55:51,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-10-13 23:55:51,175 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 38 [2020-10-13 23:55:51,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:55:51,175 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-10-13 23:55:51,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:55:51,176 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-10-13 23:55:51,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 23:55:51,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:55:51,176 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:55:51,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:55:51,177 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:55:51,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:55:51,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1550387259, now seen corresponding path program 9 times [2020-10-13 23:55:51,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:55:51,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245016438] [2020-10-13 23:55:51,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:55:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:51,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:51,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:52,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:52,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:52,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 23:55:52,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:55:52,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1186 [2020-10-13 23:55:52,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:52,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:52,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:55:52,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:55:52,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 23:55:52,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:52,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:55:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:52,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:52,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:52,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:55:52,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:52,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:55:52,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:52,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:52,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:52,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:52,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:52,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:52,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:55:52,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:52,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:52,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:52,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:55:52,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:52,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:55:52,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:52,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:52,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:52,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:52,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:52,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:55:52,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245016438] [2020-10-13 23:55:52,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:55:52,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:55:52,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141821644] [2020-10-13 23:55:52,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:55:52,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:55:52,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:55:52,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:55:52,924 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 20 states. [2020-10-13 23:55:54,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:55:54,175 INFO L93 Difference]: Finished difference Result 121 states and 134 transitions. [2020-10-13 23:55:54,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:55:54,175 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2020-10-13 23:55:54,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:55:54,176 INFO L225 Difference]: With dead ends: 121 [2020-10-13 23:55:54,177 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 23:55:54,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:55:54,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 23:55:54,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 89. [2020-10-13 23:55:54,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-13 23:55:54,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2020-10-13 23:55:54,190 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 38 [2020-10-13 23:55:54,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:55:54,190 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2020-10-13 23:55:54,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:55:54,190 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2020-10-13 23:55:54,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 23:55:54,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:55:54,191 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:55:54,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:55:54,192 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:55:54,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:55:54,192 INFO L82 PathProgramCache]: Analyzing trace with hash -492108167, now seen corresponding path program 10 times [2020-10-13 23:55:54,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:55:54,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267238209] [2020-10-13 23:55:54,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:55:54,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:54,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:54,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:54,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:55,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:55,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 23:55:55,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:55:55,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 937 [2020-10-13 23:55:55,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:55,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:55,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:55:55,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:55:55,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:55:55,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:55,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:55:55,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:55,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:55,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:55,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:55:55,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:55,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:55:55,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:55,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:55,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:55,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:55,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:55,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:55,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:55:55,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:55,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:55,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:55,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:55:55,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:55,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:55:55,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:55,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:55,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:55,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:55,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:55,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:55,262 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:55:55,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267238209] [2020-10-13 23:55:55,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:55:55,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:55:55,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678031683] [2020-10-13 23:55:55,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:55:55,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:55:55,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:55:55,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:55:55,267 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand 14 states. [2020-10-13 23:55:55,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:55:55,815 INFO L93 Difference]: Finished difference Result 150 states and 166 transitions. [2020-10-13 23:55:55,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:55:55,816 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-13 23:55:55,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:55:55,818 INFO L225 Difference]: With dead ends: 150 [2020-10-13 23:55:55,818 INFO L226 Difference]: Without dead ends: 134 [2020-10-13 23:55:55,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:55:55,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-13 23:55:55,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 110. [2020-10-13 23:55:55,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 23:55:55,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 119 transitions. [2020-10-13 23:55:55,837 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 119 transitions. Word has length 40 [2020-10-13 23:55:55,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:55:55,838 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 119 transitions. [2020-10-13 23:55:55,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:55:55,838 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 119 transitions. [2020-10-13 23:55:55,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 23:55:55,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:55:55,839 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:55:55,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:55:55,839 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:55:55,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:55:55,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1855473991, now seen corresponding path program 11 times [2020-10-13 23:55:55,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:55:55,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266436064] [2020-10-13 23:55:55,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:55:55,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:55,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:55,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:56,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:56,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 23:55:56,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:55:56,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 889 [2020-10-13 23:55:56,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:56,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:56,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:55:56,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:55:56,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:55:56,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:56,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:55:56,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:56,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:56,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:56,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:55:56,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:56,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:55:56,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:56,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:56,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:56,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:56,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:56,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:56,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:55:56,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:56,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:56,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:56,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:55:56,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:56,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:55:56,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:56,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:56,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:56,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:56,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:56,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:56,861 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:55:56,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266436064] [2020-10-13 23:55:56,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:55:56,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:55:56,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942054002] [2020-10-13 23:55:56,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:55:56,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:55:56,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:55:56,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:55:56,864 INFO L87 Difference]: Start difference. First operand 110 states and 119 transitions. Second operand 14 states. [2020-10-13 23:55:57,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:55:57,606 INFO L93 Difference]: Finished difference Result 147 states and 160 transitions. [2020-10-13 23:55:57,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:55:57,606 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-13 23:55:57,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:55:57,607 INFO L225 Difference]: With dead ends: 147 [2020-10-13 23:55:57,608 INFO L226 Difference]: Without dead ends: 126 [2020-10-13 23:55:57,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:55:57,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-13 23:55:57,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 107. [2020-10-13 23:55:57,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-13 23:55:57,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 114 transitions. [2020-10-13 23:55:57,645 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 114 transitions. Word has length 40 [2020-10-13 23:55:57,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:55:57,646 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 114 transitions. [2020-10-13 23:55:57,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:55:57,646 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 114 transitions. [2020-10-13 23:55:57,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 23:55:57,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:55:57,646 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:55:57,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:55:57,647 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:55:57,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:55:57,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1732082987, now seen corresponding path program 2 times [2020-10-13 23:55:57,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:55:57,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195274257] [2020-10-13 23:55:57,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:55:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:57,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:57,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:57,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:58,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:58,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:00,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:00,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:02,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:02,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 23:56:02,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:56:02,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:56:02,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:02,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:02,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:56:02,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:56:02,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 23:56:02,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:03,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:56:03,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:03,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:03,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:03,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:56:03,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:03,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:03,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:03,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:03,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:03,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:03,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:03,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:03,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:56:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:03,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:03,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:03,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:03,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:03,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:03,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:03,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:03,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:03,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:03,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:03,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:03,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 23:56:03,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:03,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:03,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:03,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:03,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:03,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:56:03,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:03,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:03,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:56:03,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:03,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:56:03,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:03,383 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:56:03,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195274257] [2020-10-13 23:56:03,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:56:03,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:56:03,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853318596] [2020-10-13 23:56:03,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:56:03,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:56:03,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:56:03,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:56:03,385 INFO L87 Difference]: Start difference. First operand 107 states and 114 transitions. Second operand 22 states. [2020-10-13 23:56:04,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:56:04,906 INFO L93 Difference]: Finished difference Result 113 states and 119 transitions. [2020-10-13 23:56:04,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:56:04,906 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2020-10-13 23:56:04,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:56:04,908 INFO L225 Difference]: With dead ends: 113 [2020-10-13 23:56:04,908 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 23:56:04,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 23:56:04,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 23:56:04,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-13 23:56:04,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-13 23:56:04,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2020-10-13 23:56:04,923 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 42 [2020-10-13 23:56:04,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:56:04,923 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2020-10-13 23:56:04,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:56:04,923 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2020-10-13 23:56:04,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 23:56:04,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:56:04,924 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:56:04,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:56:04,925 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:56:04,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:56:04,925 INFO L82 PathProgramCache]: Analyzing trace with hash -759689865, now seen corresponding path program 12 times [2020-10-13 23:56:04,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:56:04,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927437542] [2020-10-13 23:56:04,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:56:04,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:04,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:05,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:05,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:05,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:05,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 23:56:05,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:56:05,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1059 [2020-10-13 23:56:05,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:05,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:05,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:56:05,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:56:05,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 23:56:05,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:07,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:56:07,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:07,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:07,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:07,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:56:07,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:07,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:07,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:07,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:07,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:07,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:07,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:07,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:07,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:56:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:07,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:07,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:07,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:07,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:07,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:56:07,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:07,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:07,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:07,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:07,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:07,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:07,040 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:56:07,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927437542] [2020-10-13 23:56:07,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:56:07,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:56:07,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750639816] [2020-10-13 23:56:07,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:56:07,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:56:07,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:56:07,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=645, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:56:07,043 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand 27 states. [2020-10-13 23:56:07,657 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-13 23:56:08,044 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-13 23:56:08,359 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-10-13 23:56:08,721 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 37 [2020-10-13 23:56:09,603 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 35 [2020-10-13 23:56:09,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:56:09,976 INFO L93 Difference]: Finished difference Result 138 states and 147 transitions. [2020-10-13 23:56:09,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 23:56:09,976 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 42 [2020-10-13 23:56:09,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:56:09,978 INFO L225 Difference]: With dead ends: 138 [2020-10-13 23:56:09,978 INFO L226 Difference]: Without dead ends: 136 [2020-10-13 23:56:09,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=260, Invalid=1810, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 23:56:09,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-13 23:56:09,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 130. [2020-10-13 23:56:09,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-13 23:56:09,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 138 transitions. [2020-10-13 23:56:09,996 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 138 transitions. Word has length 42 [2020-10-13 23:56:09,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:56:09,997 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 138 transitions. [2020-10-13 23:56:09,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:56:09,997 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 138 transitions. [2020-10-13 23:56:09,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 23:56:09,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:56:09,998 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:56:09,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:56:09,998 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:56:09,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:56:09,999 INFO L82 PathProgramCache]: Analyzing trace with hash -207663883, now seen corresponding path program 13 times [2020-10-13 23:56:09,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:56:09,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358954122] [2020-10-13 23:56:09,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:56:10,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:10,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:10,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:10,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:10,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 23:56:10,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:56:10,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 725 [2020-10-13 23:56:10,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:10,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:10,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:56:10,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:56:10,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:56:10,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:10,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:56:10,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:10,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:10,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:10,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:56:10,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:10,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:10,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:10,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:10,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:10,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:10,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:10,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:10,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:56:10,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:10,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:10,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:10,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:10,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:10,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:56:10,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:10,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:10,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:10,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:10,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:10,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:10,886 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:56:10,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358954122] [2020-10-13 23:56:10,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:56:10,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:56:10,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102173135] [2020-10-13 23:56:10,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:56:10,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:56:10,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:56:10,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:56:10,888 INFO L87 Difference]: Start difference. First operand 130 states and 138 transitions. Second operand 16 states. [2020-10-13 23:56:11,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:56:11,822 INFO L93 Difference]: Finished difference Result 198 states and 216 transitions. [2020-10-13 23:56:11,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:56:11,823 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2020-10-13 23:56:11,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:56:11,825 INFO L225 Difference]: With dead ends: 198 [2020-10-13 23:56:11,825 INFO L226 Difference]: Without dead ends: 187 [2020-10-13 23:56:11,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:56:11,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-13 23:56:11,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 132. [2020-10-13 23:56:11,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-13 23:56:11,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 140 transitions. [2020-10-13 23:56:11,846 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 140 transitions. Word has length 44 [2020-10-13 23:56:11,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:56:11,847 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 140 transitions. [2020-10-13 23:56:11,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:56:11,847 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 140 transitions. [2020-10-13 23:56:11,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 23:56:11,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:56:11,848 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:56:11,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:56:11,848 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:56:11,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:56:11,849 INFO L82 PathProgramCache]: Analyzing trace with hash 163027473, now seen corresponding path program 3 times [2020-10-13 23:56:11,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:56:11,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400466314] [2020-10-13 23:56:11,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:56:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:11,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:11,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:12,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:12,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:12,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:14,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:15,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:16,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:16,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 23:56:16,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:56:16,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:56:16,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:16,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:16,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:56:16,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:56:16,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 23:56:16,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:56:17,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:56:17,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:17,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:17,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:17,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:56:17,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:17,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:17,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:17,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:17,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:17,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:17,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:17,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:17,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:56:17,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:17,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:17,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:17,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:17,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:17,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:56:17,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:17,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:17,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:17,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:17,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:17,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:17,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 23:56:17,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:17,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:17,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:17,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:17,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:17,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:17,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:17,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:17,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:56:17,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:17,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:56:17,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:17,667 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:56:17,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400466314] [2020-10-13 23:56:17,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:56:17,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:56:17,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151752527] [2020-10-13 23:56:17,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:56:17,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:56:17,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:56:17,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:56:17,669 INFO L87 Difference]: Start difference. First operand 132 states and 140 transitions. Second operand 22 states. [2020-10-13 23:56:19,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:56:19,300 INFO L93 Difference]: Finished difference Result 138 states and 145 transitions. [2020-10-13 23:56:19,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:56:19,300 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 46 [2020-10-13 23:56:19,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:56:19,301 INFO L225 Difference]: With dead ends: 138 [2020-10-13 23:56:19,301 INFO L226 Difference]: Without dead ends: 136 [2020-10-13 23:56:19,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:56:19,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-13 23:56:19,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2020-10-13 23:56:19,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 23:56:19,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 143 transitions. [2020-10-13 23:56:19,322 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 143 transitions. Word has length 46 [2020-10-13 23:56:19,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:56:19,322 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 143 transitions. [2020-10-13 23:56:19,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:56:19,322 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 143 transitions. [2020-10-13 23:56:19,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 23:56:19,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:56:19,323 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:56:19,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:56:19,323 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:56:19,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:56:19,324 INFO L82 PathProgramCache]: Analyzing trace with hash -2057108301, now seen corresponding path program 14 times [2020-10-13 23:56:19,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:56:19,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25675411] [2020-10-13 23:56:19,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:56:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:19,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:19,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:20,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:20,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:20,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 23:56:20,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:56:20,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1537 [2020-10-13 23:56:20,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:20,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:20,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 23:56:20,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:56:20,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 23:56:20,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:21,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:56:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:21,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:21,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:21,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:56:21,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:21,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:21,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:21,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:21,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:21,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:21,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:21,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:21,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:56:21,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:21,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:21,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:21,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:21,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:21,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:56:21,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:21,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:21,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:21,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:21,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:21,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:21,552 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:56:21,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25675411] [2020-10-13 23:56:21,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:56:21,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:56:21,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219620465] [2020-10-13 23:56:21,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:56:21,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:56:21,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:56:21,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=503, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:56:21,554 INFO L87 Difference]: Start difference. First operand 136 states and 143 transitions. Second operand 24 states. [2020-10-13 23:56:23,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:56:23,742 INFO L93 Difference]: Finished difference Result 183 states and 197 transitions. [2020-10-13 23:56:23,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 23:56:23,742 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2020-10-13 23:56:23,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:56:23,743 INFO L225 Difference]: With dead ends: 183 [2020-10-13 23:56:23,744 INFO L226 Difference]: Without dead ends: 181 [2020-10-13 23:56:23,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=189, Invalid=2067, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 23:56:23,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-13 23:56:23,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 152. [2020-10-13 23:56:23,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-13 23:56:23,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 161 transitions. [2020-10-13 23:56:23,766 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 161 transitions. Word has length 46 [2020-10-13 23:56:23,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:56:23,767 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 161 transitions. [2020-10-13 23:56:23,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:56:23,767 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 161 transitions. [2020-10-13 23:56:23,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 23:56:23,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:56:23,768 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:56:23,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:56:23,768 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:56:23,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:56:23,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1423844693, now seen corresponding path program 4 times [2020-10-13 23:56:23,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:56:23,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410661502] [2020-10-13 23:56:23,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:56:23,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:23,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:23,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:23,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:23,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:24,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:24,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:24,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:25,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:26,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:28,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:28,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 23:56:28,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:56:28,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:56:28,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:28,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:28,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:56:28,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:56:28,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 23:56:28,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:29,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:56:29,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:29,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:29,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:29,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:56:29,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:29,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:29,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:29,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:29,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:29,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:29,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:29,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:29,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:56:29,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:29,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:29,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:29,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:29,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:29,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:29,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:29,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:29,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:29,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:29,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:29,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:29,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 23:56:29,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:29,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:29,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:29,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:29,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:29,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:56:29,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:29,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:29,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:56:29,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:29,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:56:29,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:29,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 23:56:29,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:29,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:29,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:29,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:29,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:29,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:56:29,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:29,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:29,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:56:29,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:29,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:56:29,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:29,365 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:56:29,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410661502] [2020-10-13 23:56:29,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:56:29,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:56:29,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261515077] [2020-10-13 23:56:29,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:56:29,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:56:29,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:56:29,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:56:29,366 INFO L87 Difference]: Start difference. First operand 152 states and 161 transitions. Second operand 22 states. [2020-10-13 23:56:30,257 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-13 23:56:31,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:56:31,212 INFO L93 Difference]: Finished difference Result 162 states and 172 transitions. [2020-10-13 23:56:31,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 23:56:31,212 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-10-13 23:56:31,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:56:31,213 INFO L225 Difference]: With dead ends: 162 [2020-10-13 23:56:31,213 INFO L226 Difference]: Without dead ends: 131 [2020-10-13 23:56:31,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=307, Invalid=1763, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 23:56:31,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-13 23:56:31,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 123. [2020-10-13 23:56:31,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-13 23:56:31,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 131 transitions. [2020-10-13 23:56:31,234 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 131 transitions. Word has length 50 [2020-10-13 23:56:31,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:56:31,235 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 131 transitions. [2020-10-13 23:56:31,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:56:31,235 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 131 transitions. [2020-10-13 23:56:31,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 23:56:31,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:56:31,236 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:56:31,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:56:31,236 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:56:31,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:56:31,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1256733455, now seen corresponding path program 15 times [2020-10-13 23:56:31,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:56:31,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525831364] [2020-10-13 23:56:31,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:56:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:31,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:31,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:32,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:32,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:32,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 23:56:32,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:56:32,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1262 [2020-10-13 23:56:32,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:32,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:32,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:56:32,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:56:32,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:56:32,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:32,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:56:32,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:32,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:32,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:32,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:56:32,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:32,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:32,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:32,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:32,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:32,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:32,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:32,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:56:32,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:56:32,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:32,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:32,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:32,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:32,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:32,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:32,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:32,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:32,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:32,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:32,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:32,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:56:32,729 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:56:32,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525831364] [2020-10-13 23:56:32,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:56:32,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:56:32,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617052008] [2020-10-13 23:56:32,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:56:32,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:56:32,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:56:32,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:56:32,733 INFO L87 Difference]: Start difference. First operand 123 states and 131 transitions. Second operand 18 states. [2020-10-13 23:56:33,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:56:33,818 INFO L93 Difference]: Finished difference Result 231 states and 259 transitions. [2020-10-13 23:56:33,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 23:56:33,819 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 48 [2020-10-13 23:56:33,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:56:33,822 INFO L225 Difference]: With dead ends: 231 [2020-10-13 23:56:33,822 INFO L226 Difference]: Without dead ends: 203 [2020-10-13 23:56:33,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=330, Invalid=1002, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:56:33,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-13 23:56:33,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 155. [2020-10-13 23:56:33,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-13 23:56:33,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 168 transitions. [2020-10-13 23:56:33,848 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 168 transitions. Word has length 48 [2020-10-13 23:56:33,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:56:33,849 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 168 transitions. [2020-10-13 23:56:33,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:56:33,849 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 168 transitions. [2020-10-13 23:56:33,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 23:56:33,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:56:33,850 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:56:33,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:56:33,850 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:56:33,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:56:33,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1501713713, now seen corresponding path program 16 times [2020-10-13 23:56:33,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:56:33,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210558529] [2020-10-13 23:56:33,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:56:33,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:33,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:33,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:34,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:34,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 23:56:34,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:56:34,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 983 [2020-10-13 23:56:34,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:34,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:34,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:56:34,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:56:34,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:56:34,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:35,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:56:35,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:35,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:35,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:35,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:56:35,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:35,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:35,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:35,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:35,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:35,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:35,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:35,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:35,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:56:35,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:35,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:35,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:35,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:35,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:35,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:56:35,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:35,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:35,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:35,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:35,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:35,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:35,032 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:56:35,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210558529] [2020-10-13 23:56:35,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:56:35,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:56:35,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28528485] [2020-10-13 23:56:35,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:56:35,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:56:35,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:56:35,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:56:35,033 INFO L87 Difference]: Start difference. First operand 155 states and 168 transitions. Second operand 18 states. [2020-10-13 23:56:35,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:56:35,900 INFO L93 Difference]: Finished difference Result 224 states and 248 transitions. [2020-10-13 23:56:35,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:56:35,902 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 48 [2020-10-13 23:56:35,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:56:35,903 INFO L225 Difference]: With dead ends: 224 [2020-10-13 23:56:35,903 INFO L226 Difference]: Without dead ends: 195 [2020-10-13 23:56:35,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=782, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:56:35,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-13 23:56:35,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 152. [2020-10-13 23:56:35,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-13 23:56:35,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 163 transitions. [2020-10-13 23:56:35,933 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 163 transitions. Word has length 48 [2020-10-13 23:56:35,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:56:35,933 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 163 transitions. [2020-10-13 23:56:35,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:56:35,933 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 163 transitions. [2020-10-13 23:56:35,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 23:56:35,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:56:35,936 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:56:35,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:56:35,936 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:56:35,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:56:35,936 INFO L82 PathProgramCache]: Analyzing trace with hash -683957427, now seen corresponding path program 5 times [2020-10-13 23:56:35,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:56:35,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857297461] [2020-10-13 23:56:35,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:56:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:35,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:36,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:36,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:36,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:36,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:36,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:38,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:40,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:40,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 23:56:40,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:56:40,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:56:40,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:40,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:40,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:56:40,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 23:56:40,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 23:56:40,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:41,199 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 15 [2020-10-13 23:56:41,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:56:41,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:41,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:41,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:41,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:56:41,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:41,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:41,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:41,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:41,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:41,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:41,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:41,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:41,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:56:41,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:41,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:41,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:41,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:41,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:41,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:41,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:41,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:41,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:41,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:41,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:41,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:41,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 23:56:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:41,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:41,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:41,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:41,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:41,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:56:41,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:41,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:41,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:56:41,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:41,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:56:41,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:41,414 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-13 23:56:41,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857297461] [2020-10-13 23:56:41,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:56:41,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:56:41,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2771173] [2020-10-13 23:56:41,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:56:41,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:56:41,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:56:41,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:56:41,416 INFO L87 Difference]: Start difference. First operand 152 states and 163 transitions. Second operand 16 states. [2020-10-13 23:56:42,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:56:42,104 INFO L93 Difference]: Finished difference Result 172 states and 187 transitions. [2020-10-13 23:56:42,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:56:42,104 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-10-13 23:56:42,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:56:42,105 INFO L225 Difference]: With dead ends: 172 [2020-10-13 23:56:42,106 INFO L226 Difference]: Without dead ends: 170 [2020-10-13 23:56:42,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:56:42,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-13 23:56:42,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 166. [2020-10-13 23:56:42,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-13 23:56:42,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 180 transitions. [2020-10-13 23:56:42,141 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 180 transitions. Word has length 50 [2020-10-13 23:56:42,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:56:42,141 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 180 transitions. [2020-10-13 23:56:42,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:56:42,141 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 180 transitions. [2020-10-13 23:56:42,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 23:56:42,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:56:42,142 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:56:42,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:56:42,143 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:56:42,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:56:42,143 INFO L82 PathProgramCache]: Analyzing trace with hash -22745617, now seen corresponding path program 17 times [2020-10-13 23:56:42,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:56:42,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967039791] [2020-10-13 23:56:42,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:56:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:42,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:42,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:42,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:43,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:43,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 23:56:43,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:56:43,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1694 [2020-10-13 23:56:43,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:43,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:43,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 23:56:43,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:56:43,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 23:56:43,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:44,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:56:44,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:44,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:44,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:44,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:56:44,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:44,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:44,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:44,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:44,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:44,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:44,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:44,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:44,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:56:44,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:44,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:44,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:44,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:44,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:44,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:56:44,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:44,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:44,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:44,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:44,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:44,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:44,580 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:56:44,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967039791] [2020-10-13 23:56:44,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:56:44,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:56:44,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514687524] [2020-10-13 23:56:44,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:56:44,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:56:44,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:56:44,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=597, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:56:44,582 INFO L87 Difference]: Start difference. First operand 166 states and 180 transitions. Second operand 26 states. [2020-10-13 23:56:46,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:56:46,965 INFO L93 Difference]: Finished difference Result 226 states and 250 transitions. [2020-10-13 23:56:46,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 23:56:46,970 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2020-10-13 23:56:46,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:56:46,971 INFO L225 Difference]: With dead ends: 226 [2020-10-13 23:56:46,971 INFO L226 Difference]: Without dead ends: 224 [2020-10-13 23:56:46,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=203, Invalid=2449, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 23:56:46,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-13 23:56:47,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 191. [2020-10-13 23:56:47,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-13 23:56:47,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 207 transitions. [2020-10-13 23:56:47,012 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 207 transitions. Word has length 50 [2020-10-13 23:56:47,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:56:47,012 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 207 transitions. [2020-10-13 23:56:47,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:56:47,013 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 207 transitions. [2020-10-13 23:56:47,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 23:56:47,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:56:47,014 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:56:47,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:56:47,014 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:56:47,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:56:47,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1025111527, now seen corresponding path program 6 times [2020-10-13 23:56:47,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:56:47,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999547024] [2020-10-13 23:56:47,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:56:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:47,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:47,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:47,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:47,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:47,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:47,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:48,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:48,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:48,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:48,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:48,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:52,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:52,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 23:56:52,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 23:56:52,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:56:52,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:52,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:52,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:56:52,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:56:52,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 23:56:52,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:52,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:56:52,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:52,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:52,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:52,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:56:52,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:52,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:52,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:52,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:52,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:52,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:52,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:52,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:52,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:56:52,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:52,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:52,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:52,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:52,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:52,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:56:52,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:52,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:52,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:52,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:52,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:52,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:52,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 23:56:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:52,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:52,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:52,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:52,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:52,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:52,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:52,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:52,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:56:52,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:52,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:56:52,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:52,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 23:56:52,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:52,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:52,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:52,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:52,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:52,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:52,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:52,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:52,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:56:52,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:52,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:56:52,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:56:52,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999547024] [2020-10-13 23:56:52,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:56:52,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:56:52,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869046828] [2020-10-13 23:56:52,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:56:52,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:56:52,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:56:52,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:56:52,706 INFO L87 Difference]: Start difference. First operand 191 states and 207 transitions. Second operand 22 states. [2020-10-13 23:56:53,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:56:53,870 INFO L93 Difference]: Finished difference Result 197 states and 212 transitions. [2020-10-13 23:56:53,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:56:53,870 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-10-13 23:56:53,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:56:53,871 INFO L225 Difference]: With dead ends: 197 [2020-10-13 23:56:53,871 INFO L226 Difference]: Without dead ends: 193 [2020-10-13 23:56:53,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=142, Invalid=980, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:56:53,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-13 23:56:53,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2020-10-13 23:56:53,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-13 23:56:53,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 208 transitions. [2020-10-13 23:56:53,905 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 208 transitions. Word has length 54 [2020-10-13 23:56:53,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:56:53,905 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 208 transitions. [2020-10-13 23:56:53,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:56:53,906 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 208 transitions. [2020-10-13 23:56:53,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 23:56:53,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:56:53,907 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:56:53,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:56:53,907 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:56:53,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:56:53,908 INFO L82 PathProgramCache]: Analyzing trace with hash -444313811, now seen corresponding path program 18 times [2020-10-13 23:56:53,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:56:53,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992643212] [2020-10-13 23:56:53,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:56:53,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:53,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:54,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:55,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:56,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:56,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 23:56:56,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:56:56,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2102 [2020-10-13 23:56:56,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:56,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:56,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:56:56,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:56:56,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:56:56,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:56:56,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:56:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:56,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:56,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:56,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:56:56,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:56,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:56,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:56,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:56,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:56,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:56,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:56,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:56,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:56:56,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:56,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:56,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:56,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:56,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:56,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:56,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:56,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:56,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:56,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:56,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:56,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:56:56,265 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:56:56,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992643212] [2020-10-13 23:56:56,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:56:56,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:56:56,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262928821] [2020-10-13 23:56:56,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:56:56,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:56:56,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:56:56,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:56:56,266 INFO L87 Difference]: Start difference. First operand 193 states and 208 transitions. Second operand 20 states. [2020-10-13 23:56:57,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:56:57,518 INFO L93 Difference]: Finished difference Result 294 states and 327 transitions. [2020-10-13 23:56:57,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 23:56:57,519 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-10-13 23:56:57,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:56:57,521 INFO L225 Difference]: With dead ends: 294 [2020-10-13 23:56:57,521 INFO L226 Difference]: Without dead ends: 270 [2020-10-13 23:56:57,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=532, Invalid=1630, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 23:56:57,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-13 23:56:57,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 228. [2020-10-13 23:56:57,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-13 23:56:57,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 249 transitions. [2020-10-13 23:56:57,575 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 249 transitions. Word has length 52 [2020-10-13 23:56:57,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:56:57,575 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 249 transitions. [2020-10-13 23:56:57,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:56:57,576 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 249 transitions. [2020-10-13 23:56:57,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 23:56:57,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:56:57,577 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:56:57,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:56:57,577 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:56:57,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:56:57,578 INFO L82 PathProgramCache]: Analyzing trace with hash 428593005, now seen corresponding path program 19 times [2020-10-13 23:56:57,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:56:57,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505850294] [2020-10-13 23:56:57,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:56:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:57,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:57,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:59,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:59,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 23:56:59,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:56:59,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1688 [2020-10-13 23:56:59,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:59,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:59,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:56:59,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:56:59,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:56:59,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:59,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:56:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:59,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:59,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:59,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:56:59,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:59,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:59,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:59,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:59,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:59,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:59,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:59,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:59,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:56:59,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:59,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:59,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:59,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:59,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:59,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:56:59,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:59,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:59,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:59,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:59,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:59,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:59,505 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:56:59,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505850294] [2020-10-13 23:56:59,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:56:59,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:56:59,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256818348] [2020-10-13 23:56:59,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:56:59,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:56:59,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:56:59,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:56:59,506 INFO L87 Difference]: Start difference. First operand 228 states and 249 transitions. Second operand 20 states. [2020-10-13 23:57:00,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:57:00,516 INFO L93 Difference]: Finished difference Result 297 states and 328 transitions. [2020-10-13 23:57:00,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:57:00,517 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-10-13 23:57:00,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:57:00,519 INFO L225 Difference]: With dead ends: 297 [2020-10-13 23:57:00,519 INFO L226 Difference]: Without dead ends: 262 [2020-10-13 23:57:00,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=310, Invalid=1022, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:57:00,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-13 23:57:00,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 225. [2020-10-13 23:57:00,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-10-13 23:57:00,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 244 transitions. [2020-10-13 23:57:00,558 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 244 transitions. Word has length 52 [2020-10-13 23:57:00,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:57:00,558 INFO L479 AbstractCegarLoop]: Abstraction has 225 states and 244 transitions. [2020-10-13 23:57:00,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:57:00,559 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 244 transitions. [2020-10-13 23:57:00,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 23:57:00,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:57:00,560 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:57:00,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:57:00,560 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:57:00,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:57:00,561 INFO L82 PathProgramCache]: Analyzing trace with hash -499594965, now seen corresponding path program 20 times [2020-10-13 23:57:00,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:57:00,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465851139] [2020-10-13 23:57:00,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:57:00,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:00,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:00,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:01,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:03,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:03,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 23:57:03,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:57:03,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2438 [2020-10-13 23:57:03,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:03,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:03,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 23:57:03,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:57:03,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 23:57:03,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:04,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:57:04,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:04,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:04,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:04,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:57:04,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:04,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:57:04,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:04,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:04,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:04,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:04,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:04,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:04,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:57:04,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:04,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:04,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:04,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:04,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:04,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:57:04,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:04,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:04,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:04,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:04,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:04,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:04,548 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:57:04,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465851139] [2020-10-13 23:57:04,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:57:04,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:57:04,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976507649] [2020-10-13 23:57:04,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:57:04,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:57:04,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:57:04,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:57:04,549 INFO L87 Difference]: Start difference. First operand 225 states and 244 transitions. Second operand 28 states. [2020-10-13 23:57:07,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:57:07,370 INFO L93 Difference]: Finished difference Result 287 states and 316 transitions. [2020-10-13 23:57:07,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 23:57:07,370 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2020-10-13 23:57:07,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:57:07,373 INFO L225 Difference]: With dead ends: 287 [2020-10-13 23:57:07,373 INFO L226 Difference]: Without dead ends: 285 [2020-10-13 23:57:07,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=161, Invalid=1909, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 23:57:07,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-13 23:57:07,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 252. [2020-10-13 23:57:07,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-13 23:57:07,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 273 transitions. [2020-10-13 23:57:07,426 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 273 transitions. Word has length 54 [2020-10-13 23:57:07,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:57:07,426 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 273 transitions. [2020-10-13 23:57:07,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:57:07,427 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 273 transitions. [2020-10-13 23:57:07,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 23:57:07,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:57:07,428 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:57:07,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:57:07,428 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:57:07,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:57:07,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1854866211, now seen corresponding path program 7 times [2020-10-13 23:57:07,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:57:07,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726213133] [2020-10-13 23:57:07,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:57:07,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:07,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:07,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:07,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:07,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:08,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:09,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:09,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:10,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:11,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:12,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:12,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:12,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 23:57:12,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 23:57:12,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:57:12,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:12,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:12,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:57:12,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:57:12,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 23:57:12,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:13,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:57:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:13,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:13,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:13,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:57:13,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:13,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:57:13,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:13,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:13,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:13,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:13,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:13,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:13,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:57:13,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:13,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:13,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:13,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:13,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:13,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:57:13,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:13,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:13,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:13,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:13,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:13,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:13,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 23:57:13,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:13,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:13,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:13,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:13,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:13,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:57:13,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:13,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:13,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:57:13,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:13,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:57:13,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:13,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 23:57:13,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:13,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:13,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:13,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:13,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:13,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:57:13,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:13,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:13,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:57:13,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:13,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:57:13,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:13,141 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 58 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:57:13,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726213133] [2020-10-13 23:57:13,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:57:13,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:57:13,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368073492] [2020-10-13 23:57:13,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:57:13,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:57:13,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:57:13,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=503, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:57:13,143 INFO L87 Difference]: Start difference. First operand 252 states and 273 transitions. Second operand 24 states. [2020-10-13 23:57:15,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:57:15,025 INFO L93 Difference]: Finished difference Result 270 states and 292 transitions. [2020-10-13 23:57:15,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:57:15,026 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 58 [2020-10-13 23:57:15,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:57:15,027 INFO L225 Difference]: With dead ends: 270 [2020-10-13 23:57:15,027 INFO L226 Difference]: Without dead ends: 268 [2020-10-13 23:57:15,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=177, Invalid=1463, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:57:15,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-13 23:57:15,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 260. [2020-10-13 23:57:15,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-13 23:57:15,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 281 transitions. [2020-10-13 23:57:15,083 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 281 transitions. Word has length 58 [2020-10-13 23:57:15,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:57:15,083 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 281 transitions. [2020-10-13 23:57:15,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:57:15,083 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 281 transitions. [2020-10-13 23:57:15,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 23:57:15,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:57:15,084 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:57:15,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:57:15,085 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:57:15,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:57:15,085 INFO L82 PathProgramCache]: Analyzing trace with hash 864963433, now seen corresponding path program 21 times [2020-10-13 23:57:15,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:57:15,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672469683] [2020-10-13 23:57:15,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:57:15,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:15,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:15,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:16,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:17,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:17,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 23:57:17,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:57:17,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2545 [2020-10-13 23:57:17,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:17,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:17,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:57:17,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:57:17,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:57:17,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:17,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:57:17,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:17,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:17,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:17,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:57:17,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:17,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:57:17,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:17,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:17,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:17,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:17,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:17,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:17,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:57:17,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:17,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:17,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:17,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:17,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:17,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:57:17,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:17,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:17,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:17,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:17,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:17,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:17,900 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:57:17,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672469683] [2020-10-13 23:57:17,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:57:17,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:57:17,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163929317] [2020-10-13 23:57:17,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:57:17,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:57:17,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:57:17,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:57:17,901 INFO L87 Difference]: Start difference. First operand 260 states and 281 transitions. Second operand 22 states. [2020-10-13 23:57:19,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:57:19,636 INFO L93 Difference]: Finished difference Result 365 states and 405 transitions. [2020-10-13 23:57:19,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-13 23:57:19,637 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 56 [2020-10-13 23:57:19,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:57:19,640 INFO L225 Difference]: With dead ends: 365 [2020-10-13 23:57:19,640 INFO L226 Difference]: Without dead ends: 341 [2020-10-13 23:57:19,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=807, Invalid=2499, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 23:57:19,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-10-13 23:57:19,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 299. [2020-10-13 23:57:19,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-10-13 23:57:19,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 327 transitions. [2020-10-13 23:57:19,697 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 327 transitions. Word has length 56 [2020-10-13 23:57:19,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:57:19,698 INFO L479 AbstractCegarLoop]: Abstraction has 299 states and 327 transitions. [2020-10-13 23:57:19,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:57:19,698 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 327 transitions. [2020-10-13 23:57:19,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 23:57:19,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:57:19,699 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:57:19,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:57:19,699 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:57:19,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:57:19,700 INFO L82 PathProgramCache]: Analyzing trace with hash -2085176407, now seen corresponding path program 22 times [2020-10-13 23:57:19,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:57:19,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744868172] [2020-10-13 23:57:19,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:57:19,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:19,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:19,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:21,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:21,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 23:57:21,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:57:21,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2099 [2020-10-13 23:57:21,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:21,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:21,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:57:21,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:57:21,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:57:21,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:22,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:57:22,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:22,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:22,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:22,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:57:22,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:22,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:57:22,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:22,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:22,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:22,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:22,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:22,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:22,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:57:22,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:22,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:22,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:22,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:22,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:22,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:57:22,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:22,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:22,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:22,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:22,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:22,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:57:22,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744868172] [2020-10-13 23:57:22,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:57:22,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:57:22,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647899795] [2020-10-13 23:57:22,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:57:22,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:57:22,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:57:22,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:57:22,080 INFO L87 Difference]: Start difference. First operand 299 states and 327 transitions. Second operand 22 states. [2020-10-13 23:57:23,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:57:23,728 INFO L93 Difference]: Finished difference Result 372 states and 411 transitions. [2020-10-13 23:57:23,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 23:57:23,729 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 56 [2020-10-13 23:57:23,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:57:23,732 INFO L225 Difference]: With dead ends: 372 [2020-10-13 23:57:23,732 INFO L226 Difference]: Without dead ends: 333 [2020-10-13 23:57:23,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=379, Invalid=1261, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:57:23,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-10-13 23:57:23,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 296. [2020-10-13 23:57:23,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-10-13 23:57:23,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 322 transitions. [2020-10-13 23:57:23,787 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 322 transitions. Word has length 56 [2020-10-13 23:57:23,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:57:23,787 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 322 transitions. [2020-10-13 23:57:23,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:57:23,787 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 322 transitions. [2020-10-13 23:57:23,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 23:57:23,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:57:23,788 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:57:23,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:57:23,789 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:57:23,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:57:23,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1834587751, now seen corresponding path program 23 times [2020-10-13 23:57:23,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:57:23,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99353023] [2020-10-13 23:57:23,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:57:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:23,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:24,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:26,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:27,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:27,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 23:57:27,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:57:27,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3219 [2020-10-13 23:57:27,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:27,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:27,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 23:57:27,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:57:27,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 23:57:27,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:27,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:57:27,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:27,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:27,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:27,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:57:27,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:27,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:57:27,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:27,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:27,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:27,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:27,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:27,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:27,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:57:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:27,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:27,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:27,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:27,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:27,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:57:27,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:27,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:27,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:27,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:27,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:27,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:27,433 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-13 23:57:27,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99353023] [2020-10-13 23:57:27,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:57:27,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:57:27,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433964563] [2020-10-13 23:57:27,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:57:27,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:57:27,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:57:27,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:57:27,435 INFO L87 Difference]: Start difference. First operand 296 states and 322 transitions. Second operand 16 states. [2020-10-13 23:57:28,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:57:28,268 INFO L93 Difference]: Finished difference Result 302 states and 327 transitions. [2020-10-13 23:57:28,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:57:28,269 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2020-10-13 23:57:28,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:57:28,270 INFO L225 Difference]: With dead ends: 302 [2020-10-13 23:57:28,270 INFO L226 Difference]: Without dead ends: 300 [2020-10-13 23:57:28,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:57:28,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-10-13 23:57:28,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2020-10-13 23:57:28,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-10-13 23:57:28,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 325 transitions. [2020-10-13 23:57:28,330 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 325 transitions. Word has length 58 [2020-10-13 23:57:28,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:57:28,330 INFO L479 AbstractCegarLoop]: Abstraction has 300 states and 325 transitions. [2020-10-13 23:57:28,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:57:28,331 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 325 transitions. [2020-10-13 23:57:28,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 23:57:28,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:57:28,332 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:57:28,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:57:28,332 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:57:28,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:57:28,332 INFO L82 PathProgramCache]: Analyzing trace with hash 858135485, now seen corresponding path program 8 times [2020-10-13 23:57:28,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:57:28,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969560452] [2020-10-13 23:57:28,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:57:28,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:28,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:28,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:28,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:28,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:29,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:29,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:32,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:32,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:33,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:33,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:33,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 23:57:33,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:57:33,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:57:33,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:33,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:33,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:57:33,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:57:33,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 23:57:33,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:34,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:57:34,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:34,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:34,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:34,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:57:34,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:34,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:57:34,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:34,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:34,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:34,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:34,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:34,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:34,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:57:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:34,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:34,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:34,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:34,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:34,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:57:34,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:34,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:34,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:34,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:34,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:34,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:57:34,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 23:57:34,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:34,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:34,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:34,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:34,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:34,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:57:34,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:34,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:34,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:57:34,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:34,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:57:34,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:34,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 23:57:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:34,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:34,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:34,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:34,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:34,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 23:57:34,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:34,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:34,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:57:34,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:34,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:57:34,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:34,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 23:57:34,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:34,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:34,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:34,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:34,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:34,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:57:34,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:34,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:34,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:57:34,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:34,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:57:34,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:34,456 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 23:57:34,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969560452] [2020-10-13 23:57:34,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:57:34,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:57:34,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329736009] [2020-10-13 23:57:34,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:57:34,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:57:34,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:57:34,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:57:34,465 INFO L87 Difference]: Start difference. First operand 300 states and 325 transitions. Second operand 24 states. [2020-10-13 23:57:36,679 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-13 23:57:36,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:57:36,927 INFO L93 Difference]: Finished difference Result 304 states and 328 transitions. [2020-10-13 23:57:36,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 23:57:36,927 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 62 [2020-10-13 23:57:36,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:57:36,929 INFO L225 Difference]: With dead ends: 304 [2020-10-13 23:57:36,929 INFO L226 Difference]: Without dead ends: 263 [2020-10-13 23:57:36,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=347, Invalid=2203, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 23:57:36,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-13 23:57:36,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 261. [2020-10-13 23:57:36,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-13 23:57:36,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 285 transitions. [2020-10-13 23:57:36,979 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 285 transitions. Word has length 62 [2020-10-13 23:57:36,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:57:36,979 INFO L479 AbstractCegarLoop]: Abstraction has 261 states and 285 transitions. [2020-10-13 23:57:36,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:57:36,979 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 285 transitions. [2020-10-13 23:57:36,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 23:57:36,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:57:36,980 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:57:36,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:57:36,981 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:57:36,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:57:36,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1513882207, now seen corresponding path program 9 times [2020-10-13 23:57:36,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:57:36,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734167427] [2020-10-13 23:57:36,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:57:36,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:37,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:37,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:37,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:37,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:41,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:41,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:42,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:42,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 23:57:42,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:57:42,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-13 23:57:42,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:42,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:42,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:57:42,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 23:57:42,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 23:57:42,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:42,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:57:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:42,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:42,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:42,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:57:42,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:42,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:57:42,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:42,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:42,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:42,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:42,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:42,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:42,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:57:42,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:42,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:42,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:42,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:42,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:42,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:57:42,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:42,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:42,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:42,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:42,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:42,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:42,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 23:57:42,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:42,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:42,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:42,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:42,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:42,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:57:42,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:42,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:42,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:57:42,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:42,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:57:42,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:42,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 23:57:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:42,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:42,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:42,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:42,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:42,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:57:42,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:42,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:42,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:57:42,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:42,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:57:42,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:42,535 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-10-13 23:57:42,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734167427] [2020-10-13 23:57:42,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:57:42,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:57:42,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237059784] [2020-10-13 23:57:42,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:57:42,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:57:42,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:57:42,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:57:42,537 INFO L87 Difference]: Start difference. First operand 261 states and 285 transitions. Second operand 18 states. [2020-10-13 23:57:43,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:57:43,537 INFO L93 Difference]: Finished difference Result 279 states and 307 transitions. [2020-10-13 23:57:43,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:57:43,537 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 62 [2020-10-13 23:57:43,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:57:43,539 INFO L225 Difference]: With dead ends: 279 [2020-10-13 23:57:43,539 INFO L226 Difference]: Without dead ends: 277 [2020-10-13 23:57:43,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:57:43,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-13 23:57:43,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 265. [2020-10-13 23:57:43,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-13 23:57:43,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 290 transitions. [2020-10-13 23:57:43,600 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 290 transitions. Word has length 62 [2020-10-13 23:57:43,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:57:43,600 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 290 transitions. [2020-10-13 23:57:43,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:57:43,600 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 290 transitions. [2020-10-13 23:57:43,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 23:57:43,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:57:43,601 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:57:43,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:57:43,602 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:57:43,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:57:43,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1497902329, now seen corresponding path program 10 times [2020-10-13 23:57:43,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:57:43,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505694173] [2020-10-13 23:57:43,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:57:43,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:43,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:43,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:43,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:43,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:43,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:44,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:44,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:45,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:48,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:48,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 23:57:48,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:57:48,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:57:48,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:48,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:48,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 23:57:48,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:57:48,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 23:57:48,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:49,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:57:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:49,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:49,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:49,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:57:49,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:49,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:57:49,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:49,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:49,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:49,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:49,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:49,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:49,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:57:49,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:49,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:49,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:49,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:49,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:49,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:57:49,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:49,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:49,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:49,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:49,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:49,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:49,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 23:57:49,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:49,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:49,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:49,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:49,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:49,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:57:49,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:49,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:49,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:57:49,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:49,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:57:49,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:49,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 23:57:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:49,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:49,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:49,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:49,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:49,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:57:49,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:49,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:49,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:57:49,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:49,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:57:49,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:49,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 23:57:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:49,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:49,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:49,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:49,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:49,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:57:49,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:49,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:49,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:57:49,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:49,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:57:49,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:49,357 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 23:57:49,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505694173] [2020-10-13 23:57:49,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:57:49,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:57:49,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561528677] [2020-10-13 23:57:49,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:57:49,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:57:49,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:57:49,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=548, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:57:49,359 INFO L87 Difference]: Start difference. First operand 265 states and 290 transitions. Second operand 25 states. [2020-10-13 23:57:51,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:57:51,454 INFO L93 Difference]: Finished difference Result 279 states and 304 transitions. [2020-10-13 23:57:51,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 23:57:51,455 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 66 [2020-10-13 23:57:51,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:57:51,457 INFO L225 Difference]: With dead ends: 279 [2020-10-13 23:57:51,457 INFO L226 Difference]: Without dead ends: 277 [2020-10-13 23:57:51,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=197, Invalid=1609, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 23:57:51,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-13 23:57:51,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 273. [2020-10-13 23:57:51,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-13 23:57:51,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 298 transitions. [2020-10-13 23:57:51,552 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 298 transitions. Word has length 66 [2020-10-13 23:57:51,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:57:51,553 INFO L479 AbstractCegarLoop]: Abstraction has 273 states and 298 transitions. [2020-10-13 23:57:51,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:57:51,553 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 298 transitions. [2020-10-13 23:57:51,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 23:57:51,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:57:51,557 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:57:51,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:57:51,557 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:57:51,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:57:51,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1013960651, now seen corresponding path program 11 times [2020-10-13 23:57:51,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:57:51,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192950179] [2020-10-13 23:57:51,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:57:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:51,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:51,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:51,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:52,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:52,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:52,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:53,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:55,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:56,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:56,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 23:57:56,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:57:56,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:57:56,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:56,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:56,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 23:57:56,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:57:56,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 23:57:56,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:57,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:57:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:57,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:57,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:57,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:57:57,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:57,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:57:57,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:57,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:57,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:57,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:57,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:57,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:57:57,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:57:57,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:57,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:57,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:57,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:57,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:57,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:57:57,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:57,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:57,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:57,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:57,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:57,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:57:57,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 23:57:57,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:57,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:57,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:57,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:57,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:57,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:57:57,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:57,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:57,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:57:57,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:57,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:57:57,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:57:57,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 23:57:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:57,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:57,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:57,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:57,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:57,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:57:57,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:57,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:57,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:57:57,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:57,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:57:57,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:57:57,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 23:57:57,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:57,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:57,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:57,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:57,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:57,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:57:57,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:57,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:57,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:57:57,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:57,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:57:57,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:57,623 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 6 proven. 90 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 23:57:57,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192950179] [2020-10-13 23:57:57,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:57:57,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:57:57,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798093952] [2020-10-13 23:57:57,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:57:57,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:57:57,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:57:57,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:57:57,625 INFO L87 Difference]: Start difference. First operand 273 states and 298 transitions. Second operand 27 states. [2020-10-13 23:57:59,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:57:59,824 INFO L93 Difference]: Finished difference Result 283 states and 307 transitions. [2020-10-13 23:57:59,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 23:57:59,825 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 70 [2020-10-13 23:57:59,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:57:59,826 INFO L225 Difference]: With dead ends: 283 [2020-10-13 23:57:59,826 INFO L226 Difference]: Without dead ends: 281 [2020-10-13 23:57:59,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=207, Invalid=2243, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 23:57:59,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-13 23:57:59,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 277. [2020-10-13 23:57:59,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-13 23:57:59,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 301 transitions. [2020-10-13 23:57:59,897 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 301 transitions. Word has length 70 [2020-10-13 23:57:59,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:57:59,898 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 301 transitions. [2020-10-13 23:57:59,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:57:59,898 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 301 transitions. [2020-10-13 23:57:59,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 23:57:59,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:57:59,899 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:57:59,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:57:59,900 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:57:59,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:57:59,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1643978959, now seen corresponding path program 12 times [2020-10-13 23:57:59,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:57:59,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213480404] [2020-10-13 23:57:59,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:57:59,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:59,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:00,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:00,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:00,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:00,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:01,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:01,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:01,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:01,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:02,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:03,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:04,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:04,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 23:58:04,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 23:58:04,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:58:04,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:04,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:04,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 23:58:04,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:58:04,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 23:58:04,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:05,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:58:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:05,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:05,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:05,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:58:05,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:05,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:58:05,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:05,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:05,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:05,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:05,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:05,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:05,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:58:05,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:05,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:05,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:05,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:58:05,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:05,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:58:05,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:05,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:05,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:05,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:05,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:05,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:05,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 23:58:05,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:05,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:05,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:05,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:58:05,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:05,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:58:05,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:05,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:05,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:58:05,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:05,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:58:05,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:05,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 23:58:05,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:05,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:05,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:05,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:58:05,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:05,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:58:05,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:05,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:05,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:58:05,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:05,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:58:05,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:58:05,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 23:58:05,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:05,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:05,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:05,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:58:05,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:05,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:58:05,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:05,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:05,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:58:05,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:05,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:58:05,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:05,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-13 23:58:05,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:05,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:05,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:05,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:58:05,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:05,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:58:05,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:05,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:05,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:58:05,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:05,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:58:05,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:05,888 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 43 proven. 55 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 23:58:05,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213480404] [2020-10-13 23:58:05,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:58:05,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 23:58:05,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838948851] [2020-10-13 23:58:05,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 23:58:05,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:58:05,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 23:58:05,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:58:05,890 INFO L87 Difference]: Start difference. First operand 277 states and 301 transitions. Second operand 29 states. [2020-10-13 23:58:07,280 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-13 23:58:09,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:58:09,067 INFO L93 Difference]: Finished difference Result 287 states and 310 transitions. [2020-10-13 23:58:09,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 23:58:09,068 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 74 [2020-10-13 23:58:09,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:58:09,072 INFO L225 Difference]: With dead ends: 287 [2020-10-13 23:58:09,072 INFO L226 Difference]: Without dead ends: 242 [2020-10-13 23:58:09,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=512, Invalid=3148, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 23:58:09,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-13 23:58:09,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2020-10-13 23:58:09,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-13 23:58:09,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 263 transitions. [2020-10-13 23:58:09,136 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 263 transitions. Word has length 74 [2020-10-13 23:58:09,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:58:09,136 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 263 transitions. [2020-10-13 23:58:09,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 23:58:09,136 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 263 transitions. [2020-10-13 23:58:09,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 23:58:09,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:58:09,137 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:58:09,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:58:09,138 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:58:09,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:58:09,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1153882767, now seen corresponding path program 13 times [2020-10-13 23:58:09,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:58:09,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383258851] [2020-10-13 23:58:09,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:58:09,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:09,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:09,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:09,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:10,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:10,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:10,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:14,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:14,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 23:58:14,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:58:14,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:58:14,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:14,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:14,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 23:58:14,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:58:14,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-13 23:58:14,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:15,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:58:15,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:15,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:15,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:15,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:58:15,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:15,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:58:15,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:15,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:15,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:15,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:15,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:15,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:15,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:58:15,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:15,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:15,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:15,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:58:15,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:15,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:58:15,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:15,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:15,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:15,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:15,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:15,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:58:15,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 23:58:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:15,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:15,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:15,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:58:15,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:15,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:58:15,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:15,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:15,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:58:15,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:15,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:58:15,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:58:15,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 23:58:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:15,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:15,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:15,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:58:15,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:15,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:58:15,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:15,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:15,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:58:15,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:15,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:58:15,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:58:15,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-13 23:58:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:15,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:15,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:15,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:58:15,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:15,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:58:15,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:15,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:15,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:58:15,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:15,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:58:15,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:58:15,992 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 118 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 23:58:15,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383258851] [2020-10-13 23:58:15,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:58:15,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 23:58:15,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796529333] [2020-10-13 23:58:15,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 23:58:15,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:58:15,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 23:58:15,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:58:15,997 INFO L87 Difference]: Start difference. First operand 242 states and 263 transitions. Second operand 32 states. [2020-10-13 23:58:16,424 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-13 23:58:16,605 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-10-13 23:58:17,575 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-13 23:58:17,817 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-10-13 23:58:18,027 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-13 23:58:18,775 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-10-13 23:58:19,005 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2020-10-13 23:58:19,214 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-10-13 23:58:19,454 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-13 23:58:19,646 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-13 23:58:19,918 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 60 [2020-10-13 23:58:20,175 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-10-13 23:58:20,735 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 95 [2020-10-13 23:58:21,164 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-10-13 23:58:21,731 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2020-10-13 23:58:22,567 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2020-10-13 23:58:23,174 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-10-13 23:58:23,403 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-13 23:58:23,632 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-10-13 23:58:23,967 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-13 23:58:24,181 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-13 23:58:24,355 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-13 23:58:24,589 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-13 23:58:25,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:58:25,019 INFO L93 Difference]: Finished difference Result 246 states and 267 transitions. [2020-10-13 23:58:25,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-13 23:58:25,020 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 74 [2020-10-13 23:58:25,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:58:25,022 INFO L225 Difference]: With dead ends: 246 [2020-10-13 23:58:25,022 INFO L226 Difference]: Without dead ends: 244 [2020-10-13 23:58:25,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=632, Invalid=6010, Unknown=0, NotChecked=0, Total=6642 [2020-10-13 23:58:25,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-13 23:58:25,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 242. [2020-10-13 23:58:25,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-13 23:58:25,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 263 transitions. [2020-10-13 23:58:25,066 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 263 transitions. Word has length 74 [2020-10-13 23:58:25,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:58:25,066 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 263 transitions. [2020-10-13 23:58:25,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 23:58:25,066 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 263 transitions. [2020-10-13 23:58:25,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 23:58:25,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:58:25,067 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:58:25,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:58:25,067 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:58:25,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:58:25,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1852037109, now seen corresponding path program 14 times [2020-10-13 23:58:25,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:58:25,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725995221] [2020-10-13 23:58:25,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:58:25,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:25,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:25,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:25,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:25,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:26,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:26,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:26,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:26,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:27,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:27,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:30,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:30,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-13 23:58:30,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 23:58:30,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:58:30,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:30,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:30,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 23:58:30,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:58:30,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-13 23:58:30,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:30,896 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-10-13 23:58:31,047 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-10-13 23:58:31,202 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-10-13 23:58:31,360 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-10-13 23:58:31,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:58:31,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:31,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:31,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:31,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:58:31,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:31,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:58:31,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:31,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:31,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:31,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:31,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:31,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:31,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:58:31,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:31,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:31,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:31,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:58:31,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:31,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:58:31,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:31,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:31,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:31,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:31,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:31,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:31,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 23:58:31,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:31,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:31,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:31,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:58:31,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:31,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:58:31,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:31,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:31,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:58:31,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:31,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:58:31,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:31,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 23:58:31,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:31,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:31,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:31,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:58:31,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:31,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:58:31,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:31,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:31,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:58:31,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:31,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:58:31,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:31,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 23:58:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:31,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:31,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:31,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:58:31,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:31,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:58:31,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:31,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:31,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:58:31,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:31,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:58:31,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:31,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-13 23:58:31,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:31,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:31,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:31,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:58:31,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:31,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:58:31,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:31,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:31,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:58:31,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:31,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:58:31,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:31,870 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 34 proven. 83 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-13 23:58:31,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725995221] [2020-10-13 23:58:31,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:58:31,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 23:58:31,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427575919] [2020-10-13 23:58:31,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 23:58:31,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:58:31,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 23:58:31,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:58:31,871 INFO L87 Difference]: Start difference. First operand 242 states and 263 transitions. Second operand 31 states. [2020-10-13 23:58:32,246 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-10-13 23:58:33,379 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2020-10-13 23:58:33,537 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-10-13 23:58:33,737 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2020-10-13 23:58:33,932 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-10-13 23:58:34,341 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 125 [2020-10-13 23:58:35,715 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2020-10-13 23:58:35,854 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-13 23:58:36,056 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-10-13 23:58:36,269 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-10-13 23:58:36,513 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2020-10-13 23:58:36,718 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2020-10-13 23:58:36,943 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2020-10-13 23:58:37,206 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 88 [2020-10-13 23:58:37,634 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2020-10-13 23:58:37,899 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 85 [2020-10-13 23:58:38,206 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 100 [2020-10-13 23:58:38,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:58:38,220 INFO L93 Difference]: Finished difference Result 244 states and 264 transitions. [2020-10-13 23:58:38,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-13 23:58:38,220 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 78 [2020-10-13 23:58:38,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:58:38,221 INFO L225 Difference]: With dead ends: 244 [2020-10-13 23:58:38,221 INFO L226 Difference]: Without dead ends: 191 [2020-10-13 23:58:38,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=640, Invalid=4052, Unknown=0, NotChecked=0, Total=4692 [2020-10-13 23:58:38,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-13 23:58:38,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2020-10-13 23:58:38,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-13 23:58:38,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 208 transitions. [2020-10-13 23:58:38,253 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 208 transitions. Word has length 78 [2020-10-13 23:58:38,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:58:38,254 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 208 transitions. [2020-10-13 23:58:38,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 23:58:38,254 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 208 transitions. [2020-10-13 23:58:38,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 23:58:38,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:58:38,255 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:58:38,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:58:38,256 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:58:38,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:58:38,256 INFO L82 PathProgramCache]: Analyzing trace with hash 587074733, now seen corresponding path program 15 times [2020-10-13 23:58:38,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:58:38,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254253626] [2020-10-13 23:58:38,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:58:38,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:38,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:38,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:38,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:38,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:39,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:41,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:43,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:43,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 23:58:43,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:58:43,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:58:43,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:43,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:43,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:58:43,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-13 23:58:43,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 23:58:43,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:44,097 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 18 [2020-10-13 23:58:44,426 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 23 [2020-10-13 23:58:44,712 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 20 [2020-10-13 23:58:45,095 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 19 [2020-10-13 23:58:45,424 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 15 [2020-10-13 23:58:45,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:58:45,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:45,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:45,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:45,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:58:45,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:45,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:58:45,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:45,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:45,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:45,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:45,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:45,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:45,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:58:45,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:45,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:45,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:45,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:58:45,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:45,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:58:45,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:45,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:45,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:45,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:45,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:45,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:45,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 23:58:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:45,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:45,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:45,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:58:45,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:45,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:58:45,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:45,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:45,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:58:45,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:45,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:58:45,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:45,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 23:58:45,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:45,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:45,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:45,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:58:45,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:45,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:58:45,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:45,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:45,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:58:45,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:45,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:58:45,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:45,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-13 23:58:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:45,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:45,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:45,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:58:45,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:45,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:58:45,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:45,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:45,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:58:45,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:45,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:58:45,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 5 proven. 77 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-10-13 23:58:45,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254253626] [2020-10-13 23:58:45,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:58:45,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:58:45,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505228428] [2020-10-13 23:58:45,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:58:45,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:58:45,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:58:45,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=378, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:58:45,969 INFO L87 Difference]: Start difference. First operand 191 states and 208 transitions. Second operand 21 states. [2020-10-13 23:58:46,989 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-10-13 23:58:47,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:58:47,574 INFO L93 Difference]: Finished difference Result 211 states and 227 transitions. [2020-10-13 23:58:47,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:58:47,574 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 78 [2020-10-13 23:58:47,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:58:47,576 INFO L225 Difference]: With dead ends: 211 [2020-10-13 23:58:47,576 INFO L226 Difference]: Without dead ends: 209 [2020-10-13 23:58:47,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:58:47,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-13 23:58:47,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2020-10-13 23:58:47,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-13 23:58:47,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 222 transitions. [2020-10-13 23:58:47,625 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 222 transitions. Word has length 78 [2020-10-13 23:58:47,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:58:47,625 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 222 transitions. [2020-10-13 23:58:47,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:58:47,625 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 222 transitions. [2020-10-13 23:58:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 23:58:47,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:58:47,627 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:58:47,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 23:58:47,627 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:58:47,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:58:47,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1618337465, now seen corresponding path program 16 times [2020-10-13 23:58:47,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:58:47,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345420304] [2020-10-13 23:58:47,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:58:47,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:47,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:47,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:48,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:48,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:49,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:52,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:52,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 23:58:52,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:58:52,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:58:52,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:52,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:52,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 23:58:52,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:58:52,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-13 23:58:52,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:54,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:58:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:54,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:54,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:54,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:58:54,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:54,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:58:54,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:54,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:54,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:54,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:54,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:54,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:54,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:58:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:54,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:54,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:54,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:58:54,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:54,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:58:54,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:54,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:54,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:54,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:54,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:54,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:54,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 23:58:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:54,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:54,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:54,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:58:54,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:54,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:58:54,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:54,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:54,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:58:54,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:54,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:58:54,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:54,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 23:58:54,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:54,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:54,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:54,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:58:54,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:54,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:58:54,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:54,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:54,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:58:54,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:54,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:58:54,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:54,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-13 23:58:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:54,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:54,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:54,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:58:54,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:54,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:58:54,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:54,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:54,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:58:54,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:54,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:58:54,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:54,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-13 23:58:54,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:54,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:54,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:54,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:58:54,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:54,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:58:54,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:54,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:54,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:58:54,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:54,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:58:54,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:54,821 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 10 proven. 131 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-13 23:58:54,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345420304] [2020-10-13 23:58:54,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:58:54,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 23:58:54,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248135413] [2020-10-13 23:58:54,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 23:58:54,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:58:54,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 23:58:54,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:58:54,823 INFO L87 Difference]: Start difference. First operand 207 states and 222 transitions. Second operand 31 states. [2020-10-13 23:58:55,278 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-10-13 23:58:55,517 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-10-13 23:58:55,845 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-13 23:58:57,078 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-13 23:58:57,354 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-10-13 23:58:57,618 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-13 23:58:58,028 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-13 23:58:58,579 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-10-13 23:58:59,428 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2020-10-13 23:58:59,823 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2020-10-13 23:59:00,070 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-13 23:59:00,311 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-13 23:59:00,602 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-13 23:59:00,789 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-10-13 23:59:00,983 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-13 23:59:01,375 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2020-10-13 23:59:01,865 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-10-13 23:59:01,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:59:01,877 INFO L93 Difference]: Finished difference Result 211 states and 226 transitions. [2020-10-13 23:59:01,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-13 23:59:01,877 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 82 [2020-10-13 23:59:01,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:59:01,879 INFO L225 Difference]: With dead ends: 211 [2020-10-13 23:59:01,879 INFO L226 Difference]: Without dead ends: 209 [2020-10-13 23:59:01,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=497, Invalid=4059, Unknown=0, NotChecked=0, Total=4556 [2020-10-13 23:59:01,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-13 23:59:01,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2020-10-13 23:59:01,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-13 23:59:01,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 222 transitions. [2020-10-13 23:59:01,937 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 222 transitions. Word has length 82 [2020-10-13 23:59:01,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:59:01,937 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 222 transitions. [2020-10-13 23:59:01,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 23:59:01,937 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 222 transitions. [2020-10-13 23:59:01,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 23:59:01,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:59:01,942 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:59:01,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 23:59:01,942 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:59:01,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:59:01,942 INFO L82 PathProgramCache]: Analyzing trace with hash -2088629117, now seen corresponding path program 17 times [2020-10-13 23:59:01,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:59:01,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578701347] [2020-10-13 23:59:01,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:59:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:01,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:02,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:02,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:02,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:04,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:04,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:05,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:06,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:06,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 23:59:06,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:59:06,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:59:06,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:06,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:06,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 23:59:06,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-13 23:59:06,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 23:59:06,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:07,297 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 19 [2020-10-13 23:59:07,765 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 19 [2020-10-13 23:59:07,916 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 18 [2020-10-13 23:59:08,249 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 15 [2020-10-13 23:59:08,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:59:08,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:08,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:08,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:08,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:59:08,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:08,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:59:08,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:08,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:08,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:59:08,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:08,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:59:08,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:08,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:59:08,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:08,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:08,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:08,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:59:08,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:08,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:59:08,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:08,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:08,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:59:08,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:08,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:59:08,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:08,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 23:59:08,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:08,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:08,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:08,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:59:08,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:08,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:59:08,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:08,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:08,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:59:08,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:08,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:59:08,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:08,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 23:59:08,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:08,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:08,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:08,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:59:08,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:08,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:59:08,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:08,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:08,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:59:08,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:08,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:59:08,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:08,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-13 23:59:08,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:08,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:08,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:08,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:59:08,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:08,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:59:08,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:08,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:08,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:59:08,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:08,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:59:08,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:08,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-13 23:59:08,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:08,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:08,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:08,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:59:08,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:08,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:59:08,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:08,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:08,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:59:08,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:08,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:59:08,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:08,738 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 7 proven. 100 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-10-13 23:59:08,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578701347] [2020-10-13 23:59:08,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:59:08,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:59:08,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276620423] [2020-10-13 23:59:08,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:59:08,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:59:08,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:59:08,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=460, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:59:08,740 INFO L87 Difference]: Start difference. First operand 207 states and 222 transitions. Second operand 23 states. [2020-10-13 23:59:10,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:59:10,628 INFO L93 Difference]: Finished difference Result 227 states and 241 transitions. [2020-10-13 23:59:10,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:59:10,629 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 86 [2020-10-13 23:59:10,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:59:10,630 INFO L225 Difference]: With dead ends: 227 [2020-10-13 23:59:10,630 INFO L226 Difference]: Without dead ends: 225 [2020-10-13 23:59:10,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:59:10,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-13 23:59:10,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2020-10-13 23:59:10,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-13 23:59:10,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 236 transitions. [2020-10-13 23:59:10,697 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 236 transitions. Word has length 86 [2020-10-13 23:59:10,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:59:10,697 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 236 transitions. [2020-10-13 23:59:10,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:59:10,698 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 236 transitions. [2020-10-13 23:59:10,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 23:59:10,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:59:10,699 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:59:10,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 23:59:10,699 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:59:10,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:59:10,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1038411549, now seen corresponding path program 18 times [2020-10-13 23:59:10,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:59:10,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546050809] [2020-10-13 23:59:10,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:59:10,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:10,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:10,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:10,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:12,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:12,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:12,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:12,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:12,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:13,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking...