/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=BIGGEST --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-examples/standard_copy3_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:50:50,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:50:50,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:50:50,811 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:50:50,811 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:50:50,818 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:50:50,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:50:50,824 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:50:50,826 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:50:50,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:50:50,831 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:50:50,832 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:50:50,832 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:50:50,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:50:50,837 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:50:50,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:50:50,839 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:50:50,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:50:50,841 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:50:50,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:50:50,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:50:50,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:50:50,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:50:50,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:50:50,869 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:50:50,869 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:50:50,869 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:50:50,870 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:50:50,870 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:50:50,871 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:50:50,871 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:50:50,878 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:50:50,879 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:50:50,880 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:50:50,881 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:50:50,881 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:50:50,882 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:50:50,882 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:50:50,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:50:50,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:50:50,885 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:50:50,886 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 [2020-10-12 09:50:50,924 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:50:50,924 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:50:50,926 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:50:50,926 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:50:50,926 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:50:50,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:50:50,927 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:50:50,927 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:50:50,927 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:50:50,927 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:50:50,928 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:50:50,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:50:50,929 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:50:50,929 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:50:50,929 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:50:50,929 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:50:50,930 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:50:50,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:50:50,930 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:50:50,930 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:50:50,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:50:50,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:50:50,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:50:50,931 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:50:50,931 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:50:50,932 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:50:50,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:50:50,932 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:50:50,932 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:50:50,932 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 09:50:51,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:50:51,244 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:50:51,247 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:50:51,249 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:50:51,249 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:50:51,250 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy3_ground-1.i [2020-10-12 09:50:51,313 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6cd7342d8/6f586c4900204de1b141d899d7051160/FLAGddab3d712 [2020-10-12 09:50:51,698 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:50:51,699 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy3_ground-1.i [2020-10-12 09:50:51,705 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6cd7342d8/6f586c4900204de1b141d899d7051160/FLAGddab3d712 [2020-10-12 09:50:52,067 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6cd7342d8/6f586c4900204de1b141d899d7051160 [2020-10-12 09:50:52,075 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:50:52,077 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:50:52,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:50:52,078 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:50:52,082 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:50:52,083 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:50:52" (1/1) ... [2020-10-12 09:50:52,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c1f11fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:50:52, skipping insertion in model container [2020-10-12 09:50:52,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:50:52" (1/1) ... [2020-10-12 09:50:52,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:50:52,114 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:50:52,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:50:52,380 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:50:52,413 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:50:52,433 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:50:52,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:50:52 WrapperNode [2020-10-12 09:50:52,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:50:52,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:50:52,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:50:52,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:50:52,522 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:50:52" (1/1) ... [2020-10-12 09:50:52,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:50:52" (1/1) ... [2020-10-12 09:50:52,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:50:52" (1/1) ... [2020-10-12 09:50:52,534 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:50:52" (1/1) ... [2020-10-12 09:50:52,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:50:52" (1/1) ... [2020-10-12 09:50:52,560 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:50:52" (1/1) ... [2020-10-12 09:50:52,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:50:52" (1/1) ... [2020-10-12 09:50:52,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:50:52,565 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:50:52,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:50:52,565 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:50:52,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:50:52" (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 [2020-10-12 09:50:52,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:50:52,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:50:52,628 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:50:52,628 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:50:52,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:50:52,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:50:52,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 09:50:52,628 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:50:52,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 09:50:52,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:50:52,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:50:52,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:50:52,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:50:52,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:50:52,897 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:50:52,898 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-12 09:50:52,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:50:52 BoogieIcfgContainer [2020-10-12 09:50:52,902 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:50:52,903 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:50:52,903 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:50:52,906 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:50:52,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:50:52" (1/3) ... [2020-10-12 09:50:52,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74288f65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:50:52, skipping insertion in model container [2020-10-12 09:50:52,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:50:52" (2/3) ... [2020-10-12 09:50:52,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74288f65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:50:52, skipping insertion in model container [2020-10-12 09:50:52,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:50:52" (3/3) ... [2020-10-12 09:50:52,910 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy3_ground-1.i [2020-10-12 09:50:52,922 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:50:52,930 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:50:52,957 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:50:53,012 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:50:53,012 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:50:53,012 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:50:53,012 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:50:53,012 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:50:53,013 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:50:53,013 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:50:53,013 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:50:53,038 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-12 09:50:53,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 09:50:53,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:50:53,063 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:50:53,063 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:50:53,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:50:53,069 INFO L82 PathProgramCache]: Analyzing trace with hash -496428460, now seen corresponding path program 1 times [2020-10-12 09:50:53,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:50:53,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438539440] [2020-10-12 09:50:53,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:50:53,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:53,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:53,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:53,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:53,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:53,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:53,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 09:50:53,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:50:53,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 636 [2020-10-12 09:50:53,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:53,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:50:53,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:50:53,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:50:53,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 09:50:53,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:50:53,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:53,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:53,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:53,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:50:53,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:50:53,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:50:53,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:53,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:50:53,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:50:53,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:50:53,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:50:53,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:50:53,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438539440] [2020-10-12 09:50:53,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:50:53,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 09:50:53,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125951430] [2020-10-12 09:50:53,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 09:50:53,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:50:53,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 09:50:53,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:50:53,926 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2020-10-12 09:50:54,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:50:54,075 INFO L93 Difference]: Finished difference Result 64 states and 89 transitions. [2020-10-12 09:50:54,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 09:50:54,078 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-12 09:50:54,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:50:54,087 INFO L225 Difference]: With dead ends: 64 [2020-10-12 09:50:54,088 INFO L226 Difference]: Without dead ends: 34 [2020-10-12 09:50:54,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:50:54,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-12 09:50:54,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-10-12 09:50:54,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-12 09:50:54,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-12 09:50:54,141 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 19 [2020-10-12 09:50:54,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:50:54,141 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-12 09:50:54,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 09:50:54,142 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-12 09:50:54,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 09:50:54,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:50:54,143 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] [2020-10-12 09:50:54,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:50:54,144 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:50:54,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:50:54,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1711436712, now seen corresponding path program 1 times [2020-10-12 09:50:54,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:50:54,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661970070] [2020-10-12 09:50:54,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:50:54,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:54,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:54,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:54,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:54,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:54,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:56,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:56,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 09:50:56,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:50:56,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1869 [2020-10-12 09:50:56,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:56,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 09:50:56,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:50:56,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 09:50:56,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:50:56,567 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 18 [2020-10-12 09:50:56,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:50:56,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:56,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:56,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:56,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:50:56,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:50:56,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:50:56,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:56,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:50:56,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:50:56,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:50:56,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:50:56,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:50:56,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661970070] [2020-10-12 09:50:56,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:50:56,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 09:50:56,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218761182] [2020-10-12 09:50:56,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 09:50:56,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:50:56,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 09:50:56,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:50:56,700 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 13 states. [2020-10-12 09:50:57,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:50:57,085 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-10-12 09:50:57,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:50:57,086 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2020-10-12 09:50:57,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:50:57,089 INFO L225 Difference]: With dead ends: 58 [2020-10-12 09:50:57,089 INFO L226 Difference]: Without dead ends: 56 [2020-10-12 09:50:57,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:50:57,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-12 09:50:57,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2020-10-12 09:50:57,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 09:50:57,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-10-12 09:50:57,108 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 25 [2020-10-12 09:50:57,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:50:57,108 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-10-12 09:50:57,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 09:50:57,109 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-10-12 09:50:57,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 09:50:57,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:50:57,111 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] [2020-10-12 09:50:57,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:50:57,112 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:50:57,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:50:57,113 INFO L82 PathProgramCache]: Analyzing trace with hash -251841402, now seen corresponding path program 2 times [2020-10-12 09:50:57,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:50:57,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332744959] [2020-10-12 09:50:57,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:50:57,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:57,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:57,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:57,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:57,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:58,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:59,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:59,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 09:50:59,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:50:59,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2434 [2020-10-12 09:50:59,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:59,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 09:50:59,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:50:59,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 09:50:59,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:00,000 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 44 [2020-10-12 09:51:00,191 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 39 [2020-10-12 09:51:00,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:00,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:00,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:00,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:00,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:00,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:00,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:51:00,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:00,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:00,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:00,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:00,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:51:00,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332744959] [2020-10-12 09:51:00,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:00,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 09:51:00,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424923475] [2020-10-12 09:51:00,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 09:51:00,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:00,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 09:51:00,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:51:00,454 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 15 states. [2020-10-12 09:51:01,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:01,482 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2020-10-12 09:51:01,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 09:51:01,482 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-10-12 09:51:01,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:01,486 INFO L225 Difference]: With dead ends: 60 [2020-10-12 09:51:01,486 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 09:51:01,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:51:01,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 09:51:01,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 37. [2020-10-12 09:51:01,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 09:51:01,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-12 09:51:01,496 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 27 [2020-10-12 09:51:01,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:01,497 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-12 09:51:01,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 09:51:01,497 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-12 09:51:01,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 09:51:01,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:01,498 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:01,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:51:01,499 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:01,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:01,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1300116769, now seen corresponding path program 1 times [2020-10-12 09:51:01,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:01,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908837069] [2020-10-12 09:51:01,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:01,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:01,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:01,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:01,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:01,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:02,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:02,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 09:51:02,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:51:02,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 924 [2020-10-12 09:51:02,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:02,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 09:51:02,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:51:02,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 09:51:02,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 09:51:02,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:02,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:02,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:02,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:02,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:02,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:02,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:02,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:02,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:02,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:02,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:02,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:02,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-12 09:51:02,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:02,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:02,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:02,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:51:02,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:02,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 09:51:02,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:02,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:02,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:51:02,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:02,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:02,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 09:51:02,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908837069] [2020-10-12 09:51:02,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:02,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 09:51:02,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007460412] [2020-10-12 09:51:02,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 09:51:02,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:02,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 09:51:02,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:51:02,492 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 5 states. [2020-10-12 09:51:02,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:02,620 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2020-10-12 09:51:02,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 09:51:02,621 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-10-12 09:51:02,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:02,622 INFO L225 Difference]: With dead ends: 71 [2020-10-12 09:51:02,623 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 09:51:02,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:51:02,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 09:51:02,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-10-12 09:51:02,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 09:51:02,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-10-12 09:51:02,647 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 33 [2020-10-12 09:51:02,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:02,650 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-10-12 09:51:02,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 09:51:02,650 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-10-12 09:51:02,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 09:51:02,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:02,655 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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] [2020-10-12 09:51:02,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:51:02,655 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:02,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:02,656 INFO L82 PathProgramCache]: Analyzing trace with hash -2018744903, now seen corresponding path program 2 times [2020-10-12 09:51:02,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:02,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128220158] [2020-10-12 09:51:02,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:02,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:02,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:02,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:02,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:02,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:05,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:07,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:07,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 09:51:07,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:51:07,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4822 [2020-10-12 09:51:07,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:07,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 09:51:07,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:51:07,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 09:51:07,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:08,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:08,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:08,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:08,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:08,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:08,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:08,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:51:08,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:08,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:08,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:08,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:08,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:08,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 09:51:08,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:08,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:08,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:08,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:51:08,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:08,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:51:08,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:08,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:51:08,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:08,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:51:08,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:08,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:51:08,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128220158] [2020-10-12 09:51:08,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:08,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 09:51:08,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346467338] [2020-10-12 09:51:08,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 09:51:08,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:08,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 09:51:08,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:51:08,798 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 20 states. [2020-10-12 09:51:10,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:10,192 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2020-10-12 09:51:10,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:51:10,193 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2020-10-12 09:51:10,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:10,194 INFO L225 Difference]: With dead ends: 58 [2020-10-12 09:51:10,194 INFO L226 Difference]: Without dead ends: 56 [2020-10-12 09:51:10,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:51:10,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-12 09:51:10,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2020-10-12 09:51:10,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 09:51:10,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-10-12 09:51:10,217 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 39 [2020-10-12 09:51:10,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:10,218 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-10-12 09:51:10,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 09:51:10,218 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-10-12 09:51:10,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 09:51:10,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:10,223 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:10,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:51:10,223 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:10,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:10,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1532683280, now seen corresponding path program 3 times [2020-10-12 09:51:10,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:10,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437493410] [2020-10-12 09:51:10,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:10,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:10,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:10,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:10,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:13,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:13,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 09:51:13,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:51:13,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3059 [2020-10-12 09:51:13,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:13,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:51:13,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:51:13,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:51:13,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:13,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:13,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:13,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:13,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:13,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:13,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:13,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:51:13,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:13,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:13,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:13,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:13,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:13,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 09:51:13,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:13,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:13,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:13,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:51:13,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:13,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:13,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:13,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:13,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:51:13,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:13,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:13,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-12 09:51:13,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:13,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:13,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:13,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:51:13,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:13,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:13,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:13,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:13,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:51:13,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:13,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:13,356 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-12 09:51:13,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437493410] [2020-10-12 09:51:13,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:13,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 09:51:13,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944070840] [2020-10-12 09:51:13,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:51:13,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:13,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:51:13,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:51:13,360 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 6 states. [2020-10-12 09:51:13,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:13,471 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2020-10-12 09:51:13,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 09:51:13,471 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-12 09:51:13,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:13,472 INFO L225 Difference]: With dead ends: 97 [2020-10-12 09:51:13,472 INFO L226 Difference]: Without dead ends: 60 [2020-10-12 09:51:13,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:51:13,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-12 09:51:13,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-10-12 09:51:13,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-12 09:51:13,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-10-12 09:51:13,485 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 47 [2020-10-12 09:51:13,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:13,485 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-10-12 09:51:13,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:51:13,486 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-10-12 09:51:13,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 09:51:13,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:13,487 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-12 09:51:13,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:51:13,487 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:13,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:13,488 INFO L82 PathProgramCache]: Analyzing trace with hash 82211146, now seen corresponding path program 4 times [2020-10-12 09:51:13,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:13,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950022568] [2020-10-12 09:51:13,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:13,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:13,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:13,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:13,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:13,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:18,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:18,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 09:51:18,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:51:18,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 09:51:18,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:18,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:51:18,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-12 09:51:18,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 09:51:18,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:18,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:18,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:18,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:18,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:18,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:18,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:18,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:18,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:18,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:18,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:18,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:18,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:18,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 09:51:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:18,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:18,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:18,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:51:18,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:18,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:18,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:18,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:18,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:51:18,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:18,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:18,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-12 09:51:18,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:18,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:18,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:18,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:51:18,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:18,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:18,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:18,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:18,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:51:18,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:18,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:18,566 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-12 09:51:18,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950022568] [2020-10-12 09:51:18,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:18,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 09:51:18,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048333343] [2020-10-12 09:51:18,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 09:51:18,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:18,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 09:51:18,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:51:18,569 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 7 states. [2020-10-12 09:51:18,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:18,704 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2020-10-12 09:51:18,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:51:18,704 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-12 09:51:18,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:18,705 INFO L225 Difference]: With dead ends: 107 [2020-10-12 09:51:18,705 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 09:51:18,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:51:18,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 09:51:18,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-10-12 09:51:18,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 09:51:18,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2020-10-12 09:51:18,719 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 53 [2020-10-12 09:51:18,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:18,719 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2020-10-12 09:51:18,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 09:51:18,719 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2020-10-12 09:51:18,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 09:51:18,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:18,720 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-12 09:51:18,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:51:18,721 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:18,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:18,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1494181084, now seen corresponding path program 5 times [2020-10-12 09:51:18,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:18,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130434580] [2020-10-12 09:51:18,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:18,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:18,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:18,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:18,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:18,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:23,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:23,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 09:51:23,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:51:23,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 09:51:23,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:23,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:51:23,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-12 09:51:23,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 09:51:23,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:23,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:23,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:23,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:23,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:23,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:23,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:23,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:23,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:23,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:23,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:23,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:23,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:23,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 09:51:23,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:23,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:23,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:23,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:51:23,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:23,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:51:23,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:23,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:23,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:51:23,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:23,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:23,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-12 09:51:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:23,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:23,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:23,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:51:23,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:23,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:23,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:23,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:23,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:51:23,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:23,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:23,809 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-10-12 09:51:23,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130434580] [2020-10-12 09:51:23,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:23,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 09:51:23,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955733880] [2020-10-12 09:51:23,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 09:51:23,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:23,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 09:51:23,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:51:23,812 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 8 states. [2020-10-12 09:51:23,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:23,956 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2020-10-12 09:51:23,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 09:51:23,957 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-10-12 09:51:23,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:23,958 INFO L225 Difference]: With dead ends: 117 [2020-10-12 09:51:23,958 INFO L226 Difference]: Without dead ends: 72 [2020-10-12 09:51:23,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:51:23,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-12 09:51:23,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2020-10-12 09:51:23,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-12 09:51:23,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2020-10-12 09:51:23,972 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 59 [2020-10-12 09:51:23,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:23,973 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2020-10-12 09:51:23,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 09:51:23,973 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2020-10-12 09:51:23,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 09:51:23,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:23,974 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-12 09:51:23,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:51:23,975 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:23,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:23,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1727383170, now seen corresponding path program 6 times [2020-10-12 09:51:23,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:23,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280656132] [2020-10-12 09:51:23,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:23,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:23,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:23,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:24,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:24,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:28,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:28,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 09:51:28,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:51:28,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:51:28,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:28,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:51:28,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:51:28,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 09:51:28,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:29,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:29,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:29,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:29,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:29,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:29,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:51:29,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:29,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:29,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:29,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:29,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:29,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 09:51:29,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:29,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:29,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:29,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:51:29,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:29,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:29,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:29,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:29,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:51:29,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:29,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:29,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-12 09:51:29,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:29,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:29,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:29,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:51:29,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:29,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:29,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:29,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:29,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:51:29,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:29,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:29,085 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-10-12 09:51:29,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280656132] [2020-10-12 09:51:29,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:29,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 09:51:29,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056872927] [2020-10-12 09:51:29,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 09:51:29,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:29,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 09:51:29,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:51:29,091 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 9 states. [2020-10-12 09:51:29,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:29,241 INFO L93 Difference]: Finished difference Result 127 states and 136 transitions. [2020-10-12 09:51:29,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 09:51:29,241 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-10-12 09:51:29,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:29,242 INFO L225 Difference]: With dead ends: 127 [2020-10-12 09:51:29,243 INFO L226 Difference]: Without dead ends: 78 [2020-10-12 09:51:29,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:51:29,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-12 09:51:29,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2020-10-12 09:51:29,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-12 09:51:29,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2020-10-12 09:51:29,256 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 65 [2020-10-12 09:51:29,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:29,257 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2020-10-12 09:51:29,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 09:51:29,257 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2020-10-12 09:51:29,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 09:51:29,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:29,258 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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] [2020-10-12 09:51:29,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:51:29,258 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:29,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:29,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1744704424, now seen corresponding path program 7 times [2020-10-12 09:51:29,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:29,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260009370] [2020-10-12 09:51:29,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:29,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:29,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:29,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:29,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:29,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:34,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:34,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 09:51:34,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:51:34,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 09:51:34,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:34,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:51:34,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:51:34,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 09:51:34,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:34,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:34,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:34,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:34,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:34,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:34,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:34,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:34,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:34,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:34,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:34,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:34,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-12 09:51:34,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:34,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:34,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:34,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:51:34,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:34,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:51:34,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:34,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:34,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:51:34,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:34,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:34,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-12 09:51:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:34,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:34,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:34,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:51:34,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:34,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:51:34,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:34,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:34,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:51:34,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:34,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:34,356 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-12 09:51:34,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260009370] [2020-10-12 09:51:34,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:34,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:51:34,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409466853] [2020-10-12 09:51:34,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:51:34,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:34,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:51:34,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:51:34,358 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 10 states. [2020-10-12 09:51:34,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:34,548 INFO L93 Difference]: Finished difference Result 137 states and 146 transitions. [2020-10-12 09:51:34,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 09:51:34,549 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 71 [2020-10-12 09:51:34,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:34,550 INFO L225 Difference]: With dead ends: 137 [2020-10-12 09:51:34,550 INFO L226 Difference]: Without dead ends: 84 [2020-10-12 09:51:34,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:51:34,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-12 09:51:34,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2020-10-12 09:51:34,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-12 09:51:34,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2020-10-12 09:51:34,566 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 71 [2020-10-12 09:51:34,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:34,566 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2020-10-12 09:51:34,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:51:34,567 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2020-10-12 09:51:34,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-12 09:51:34,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:34,568 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:34,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 09:51:34,568 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:34,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:34,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1993452622, now seen corresponding path program 8 times [2020-10-12 09:51:34,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:34,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468017265] [2020-10-12 09:51:34,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:34,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:34,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:34,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:34,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:34,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:39,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:39,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-12 09:51:39,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:51:39,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 09:51:39,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:39,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 09:51:39,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-12 09:51:39,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 09:51:39,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:39,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:39,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:39,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:39,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:39,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:39,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:39,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:39,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:39,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:39,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:39,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:39,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-12 09:51:39,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:39,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:39,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:39,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:51:39,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:39,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:39,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:39,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:39,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:51:39,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:39,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:39,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-12 09:51:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:39,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:39,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:39,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:51:39,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:39,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:39,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:39,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:39,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:51:39,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:39,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:39,681 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-12 09:51:39,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468017265] [2020-10-12 09:51:39,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:39,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 09:51:39,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575446316] [2020-10-12 09:51:39,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 09:51:39,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:39,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 09:51:39,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:51:39,684 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 11 states. [2020-10-12 09:51:39,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:39,898 INFO L93 Difference]: Finished difference Result 147 states and 156 transitions. [2020-10-12 09:51:39,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 09:51:39,899 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 77 [2020-10-12 09:51:39,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:39,900 INFO L225 Difference]: With dead ends: 147 [2020-10-12 09:51:39,900 INFO L226 Difference]: Without dead ends: 90 [2020-10-12 09:51:39,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:51:39,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-12 09:51:39,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-10-12 09:51:39,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-12 09:51:39,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2020-10-12 09:51:39,924 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 77 [2020-10-12 09:51:39,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:39,924 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2020-10-12 09:51:39,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 09:51:39,925 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2020-10-12 09:51:39,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-12 09:51:39,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:39,928 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:39,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 09:51:39,929 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:39,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:39,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1953369996, now seen corresponding path program 9 times [2020-10-12 09:51:39,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:39,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246709795] [2020-10-12 09:51:39,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:39,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:39,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:39,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:39,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:44,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:44,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-12 09:51:44,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:51:44,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 09:51:44,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:44,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:51:44,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-12 09:51:44,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 09:51:44,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:45,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:45,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:45,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:45,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:45,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:45,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:45,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:45,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:45,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:45,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:45,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:45,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-12 09:51:45,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:45,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:45,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:45,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:51:45,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:45,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:45,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:45,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:45,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:51:45,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:45,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:45,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-12 09:51:45,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:45,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:45,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:45,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:51:45,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:45,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:45,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:45,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:45,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:51:45,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:45,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 4 proven. 64 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-10-12 09:51:45,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246709795] [2020-10-12 09:51:45,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:45,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:51:45,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664211290] [2020-10-12 09:51:45,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:51:45,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:45,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:51:45,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:51:45,079 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 12 states. [2020-10-12 09:51:45,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:45,370 INFO L93 Difference]: Finished difference Result 157 states and 166 transitions. [2020-10-12 09:51:45,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 09:51:45,371 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2020-10-12 09:51:45,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:45,374 INFO L225 Difference]: With dead ends: 157 [2020-10-12 09:51:45,374 INFO L226 Difference]: Without dead ends: 96 [2020-10-12 09:51:45,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:51:45,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-12 09:51:45,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2020-10-12 09:51:45,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-12 09:51:45,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2020-10-12 09:51:45,402 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 83 [2020-10-12 09:51:45,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:45,403 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2020-10-12 09:51:45,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:51:45,403 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2020-10-12 09:51:45,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-12 09:51:45,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:45,409 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:45,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 09:51:45,410 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:45,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:45,410 INFO L82 PathProgramCache]: Analyzing trace with hash -30949402, now seen corresponding path program 10 times [2020-10-12 09:51:45,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:45,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018462379] [2020-10-12 09:51:45,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:45,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:45,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:45,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:45,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:45,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:50,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:50,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-12 09:51:50,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:51:50,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-12 09:51:50,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:50,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 09:51:50,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-12 09:51:50,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 09:51:50,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:50,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:50,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:50,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:50,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:50,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:50,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:50,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:50,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:50,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:50,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:50,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:50,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-12 09:51:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:50,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:50,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:50,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:51:50,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:50,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:50,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:50,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:50,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:51:50,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:50,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:50,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-12 09:51:50,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:50,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:50,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:50,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:51:50,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:50,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:50,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:50,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:50,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:51:50,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:50,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:50,592 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 4 proven. 81 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-10-12 09:51:50,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018462379] [2020-10-12 09:51:50,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:50,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 09:51:50,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517369059] [2020-10-12 09:51:50,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 09:51:50,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:50,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 09:51:50,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:51:50,601 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 13 states. [2020-10-12 09:51:50,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:50,865 INFO L93 Difference]: Finished difference Result 167 states and 176 transitions. [2020-10-12 09:51:50,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:51:50,866 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 89 [2020-10-12 09:51:50,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:50,867 INFO L225 Difference]: With dead ends: 167 [2020-10-12 09:51:50,867 INFO L226 Difference]: Without dead ends: 102 [2020-10-12 09:51:50,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:51:50,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-12 09:51:50,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2020-10-12 09:51:50,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-12 09:51:50,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2020-10-12 09:51:50,885 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 89 [2020-10-12 09:51:50,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:50,886 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2020-10-12 09:51:50,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 09:51:50,886 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2020-10-12 09:51:50,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-12 09:51:50,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:50,887 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:50,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 09:51:50,887 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:50,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:50,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1632240832, now seen corresponding path program 11 times [2020-10-12 09:51:50,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:50,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912623651] [2020-10-12 09:51:50,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:50,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:50,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:50,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:50,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:50,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:55,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:55,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-12 09:51:55,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:51:55,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 09:51:55,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:55,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:51:55,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:51:55,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 09:51:55,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:56,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:56,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:56,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:56,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:56,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:56,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:56,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:56,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:56,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:56,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:56,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:56,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-12 09:51:56,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:56,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:56,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:56,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:51:56,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:56,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:51:56,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:56,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:56,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:51:56,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:56,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:56,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-12 09:51:56,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:56,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:56,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:56,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:51:56,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:56,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:51:56,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:56,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:56,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:51:56,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:56,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:56,029 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 4 proven. 100 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2020-10-12 09:51:56,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912623651] [2020-10-12 09:51:56,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:56,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:51:56,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182438596] [2020-10-12 09:51:56,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:51:56,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:56,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:51:56,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:51:56,031 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand 14 states. [2020-10-12 09:51:56,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:56,285 INFO L93 Difference]: Finished difference Result 177 states and 186 transitions. [2020-10-12 09:51:56,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:51:56,286 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 95 [2020-10-12 09:51:56,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:56,287 INFO L225 Difference]: With dead ends: 177 [2020-10-12 09:51:56,287 INFO L226 Difference]: Without dead ends: 108 [2020-10-12 09:51:56,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:51:56,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-12 09:51:56,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 105. [2020-10-12 09:51:56,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-12 09:51:56,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2020-10-12 09:51:56,305 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 95 [2020-10-12 09:51:56,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:56,306 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2020-10-12 09:51:56,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:51:56,306 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2020-10-12 09:51:56,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-12 09:51:56,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:56,307 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:56,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 09:51:56,308 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:56,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:56,308 INFO L82 PathProgramCache]: Analyzing trace with hash -380928486, now seen corresponding path program 12 times [2020-10-12 09:51:56,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:56,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47234327] [2020-10-12 09:51:56,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:56,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:56,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:56,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:56,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:56,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:01,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:01,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-12 09:52:01,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:52:01,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 09:52:01,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:01,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 09:52:01,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-12 09:52:01,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:52:01,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:01,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:01,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:01,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:01,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:01,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:01,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:01,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:01,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:01,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:01,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:01,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:01,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:01,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-12 09:52:01,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:01,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:01,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:01,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:01,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:01,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:52:01,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:01,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:01,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:52:01,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:01,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:01,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-12 09:52:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:01,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:01,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:01,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:01,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:01,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:52:01,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:01,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:01,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:52:01,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:01,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:01,471 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 4 proven. 121 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2020-10-12 09:52:01,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47234327] [2020-10-12 09:52:01,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:01,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 09:52:01,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210825201] [2020-10-12 09:52:01,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 09:52:01,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:01,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 09:52:01,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:52:01,474 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 15 states. [2020-10-12 09:52:01,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:01,698 INFO L93 Difference]: Finished difference Result 187 states and 196 transitions. [2020-10-12 09:52:01,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 09:52:01,699 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 101 [2020-10-12 09:52:01,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:01,700 INFO L225 Difference]: With dead ends: 187 [2020-10-12 09:52:01,700 INFO L226 Difference]: Without dead ends: 114 [2020-10-12 09:52:01,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:52:01,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-12 09:52:01,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2020-10-12 09:52:01,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-12 09:52:01,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2020-10-12 09:52:01,714 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 101 [2020-10-12 09:52:01,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:01,715 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2020-10-12 09:52:01,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 09:52:01,716 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2020-10-12 09:52:01,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-12 09:52:01,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:01,717 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:01,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 09:52:01,717 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:01,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:01,718 INFO L82 PathProgramCache]: Analyzing trace with hash -332739596, now seen corresponding path program 13 times [2020-10-12 09:52:01,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:01,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627580647] [2020-10-12 09:52:01,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:01,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:01,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:01,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:01,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:02,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:06,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:06,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-12 09:52:06,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:52:06,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-12 09:52:06,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:06,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:52:06,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-12 09:52:06,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 09:52:06,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:06,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:06,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:06,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:06,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:06,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:06,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:06,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:06,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:06,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:06,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:06,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:06,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:06,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-12 09:52:06,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:06,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:06,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:06,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:06,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:06,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:52:06,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:06,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:06,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:52:06,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:06,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:06,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-12 09:52:06,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:06,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:06,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:06,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:06,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:06,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:52:06,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:06,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:06,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:52:06,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:06,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:06,900 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 4 proven. 144 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-10-12 09:52:06,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627580647] [2020-10-12 09:52:06,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:06,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:52:06,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858913377] [2020-10-12 09:52:06,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:52:06,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:06,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:52:06,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:52:06,903 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand 16 states. [2020-10-12 09:52:07,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:07,169 INFO L93 Difference]: Finished difference Result 197 states and 206 transitions. [2020-10-12 09:52:07,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 09:52:07,169 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 107 [2020-10-12 09:52:07,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:07,170 INFO L225 Difference]: With dead ends: 197 [2020-10-12 09:52:07,170 INFO L226 Difference]: Without dead ends: 120 [2020-10-12 09:52:07,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:52:07,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-12 09:52:07,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-10-12 09:52:07,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-12 09:52:07,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2020-10-12 09:52:07,184 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 107 [2020-10-12 09:52:07,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:07,184 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2020-10-12 09:52:07,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:52:07,185 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2020-10-12 09:52:07,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-12 09:52:07,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:07,186 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:07,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 09:52:07,186 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:07,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:07,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1148096078, now seen corresponding path program 14 times [2020-10-12 09:52:07,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:07,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249682415] [2020-10-12 09:52:07,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:07,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:07,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:07,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:07,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:08,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:12,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:12,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-12 09:52:12,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:52:12,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:52:12,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:12,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 09:52:12,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-12 09:52:12,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 09:52:12,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:12,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:12,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:12,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:12,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:12,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:12,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:12,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:12,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:12,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:12,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:12,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:12,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:12,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-12 09:52:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:12,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:12,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:12,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:12,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:12,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:52:12,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:12,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:12,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:52:12,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:12,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:12,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-12 09:52:12,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:12,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:12,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:12,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:12,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:12,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:12,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:12,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:12,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:52:12,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:12,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 4 proven. 169 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2020-10-12 09:52:12,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249682415] [2020-10-12 09:52:12,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:12,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 09:52:12,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99411393] [2020-10-12 09:52:12,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 09:52:12,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:12,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 09:52:12,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:52:12,371 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand 17 states. [2020-10-12 09:52:12,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:12,666 INFO L93 Difference]: Finished difference Result 207 states and 216 transitions. [2020-10-12 09:52:12,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:52:12,666 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 113 [2020-10-12 09:52:12,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:12,668 INFO L225 Difference]: With dead ends: 207 [2020-10-12 09:52:12,668 INFO L226 Difference]: Without dead ends: 126 [2020-10-12 09:52:12,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:52:12,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-12 09:52:12,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2020-10-12 09:52:12,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-12 09:52:12,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 127 transitions. [2020-10-12 09:52:12,694 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 127 transitions. Word has length 113 [2020-10-12 09:52:12,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:12,694 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 127 transitions. [2020-10-12 09:52:12,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 09:52:12,694 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 127 transitions. [2020-10-12 09:52:12,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-12 09:52:12,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:12,696 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:12,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 09:52:12,696 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:12,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:12,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1260741928, now seen corresponding path program 15 times [2020-10-12 09:52:12,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:12,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114955482] [2020-10-12 09:52:12,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:12,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:12,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:12,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:12,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:13,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:17,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:17,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-12 09:52:17,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:52:17,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-12 09:52:17,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:17,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 09:52:17,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 09:52:17,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 09:52:17,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:17,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:17,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:17,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:17,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:17,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:17,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:17,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:17,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:17,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:17,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:17,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:17,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:17,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-10-12 09:52:17,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:17,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:17,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:17,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:17,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:17,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:52:17,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:17,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:17,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:52:17,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:17,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:17,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-12 09:52:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:17,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:17,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:17,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:17,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:17,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:52:17,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:17,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:17,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:52:17,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:17,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:17,953 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 4 proven. 196 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2020-10-12 09:52:17,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114955482] [2020-10-12 09:52:17,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:17,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 09:52:17,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002467685] [2020-10-12 09:52:17,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 09:52:17,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:17,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 09:52:17,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:52:17,956 INFO L87 Difference]: Start difference. First operand 123 states and 127 transitions. Second operand 18 states. [2020-10-12 09:52:18,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:18,267 INFO L93 Difference]: Finished difference Result 217 states and 226 transitions. [2020-10-12 09:52:18,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 09:52:18,268 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 119 [2020-10-12 09:52:18,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:18,270 INFO L225 Difference]: With dead ends: 217 [2020-10-12 09:52:18,270 INFO L226 Difference]: Without dead ends: 132 [2020-10-12 09:52:18,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:52:18,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-12 09:52:18,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2020-10-12 09:52:18,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-12 09:52:18,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2020-10-12 09:52:18,282 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 119 [2020-10-12 09:52:18,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:18,283 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2020-10-12 09:52:18,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 09:52:18,283 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2020-10-12 09:52:18,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-12 09:52:18,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:18,284 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:18,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 09:52:18,285 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:18,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:18,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1374023810, now seen corresponding path program 16 times [2020-10-12 09:52:18,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:18,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064405118] [2020-10-12 09:52:18,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:18,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:18,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:18,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:18,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:19,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:23,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:23,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-12 09:52:23,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:52:23,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 09:52:23,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:23,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 09:52:23,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-12 09:52:23,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 09:52:23,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:23,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:23,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:23,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:23,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:23,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:23,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:23,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:23,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:23,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:23,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:23,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:23,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:23,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-10-12 09:52:23,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:23,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:23,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:23,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:23,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:23,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:52:23,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:23,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:23,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:52:23,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:23,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:23,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-10-12 09:52:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:23,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:23,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:23,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:23,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:23,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:23,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:23,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:23,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:52:23,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:23,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:23,519 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 4 proven. 225 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2020-10-12 09:52:23,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064405118] [2020-10-12 09:52:23,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:23,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 09:52:23,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610550955] [2020-10-12 09:52:23,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 09:52:23,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:23,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 09:52:23,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:52:23,521 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand 19 states. [2020-10-12 09:52:23,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:23,850 INFO L93 Difference]: Finished difference Result 227 states and 236 transitions. [2020-10-12 09:52:23,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:52:23,851 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 125 [2020-10-12 09:52:23,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:23,853 INFO L225 Difference]: With dead ends: 227 [2020-10-12 09:52:23,853 INFO L226 Difference]: Without dead ends: 138 [2020-10-12 09:52:23,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:52:23,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-12 09:52:23,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2020-10-12 09:52:23,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-12 09:52:23,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2020-10-12 09:52:23,868 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 125 [2020-10-12 09:52:23,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:23,869 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2020-10-12 09:52:23,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 09:52:23,869 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2020-10-12 09:52:23,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-12 09:52:23,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:23,870 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:23,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 09:52:23,871 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:23,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:23,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1664167844, now seen corresponding path program 17 times [2020-10-12 09:52:23,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:23,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188803683] [2020-10-12 09:52:23,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:23,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:23,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:23,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:23,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:25,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:28,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:28,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-12 09:52:28,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:52:28,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 09:52:28,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:28,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 09:52:28,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:52:28,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 09:52:28,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:29,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:29,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:29,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:29,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:29,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:29,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:29,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:29,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:29,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:29,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:29,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:29,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:29,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-10-12 09:52:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:29,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:29,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:29,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:29,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:29,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:52:29,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:29,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:29,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:52:29,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:29,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:29,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-10-12 09:52:29,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:29,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:29,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:29,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:29,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:29,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:29,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:29,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:29,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:52:29,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:29,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:29,108 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 4 proven. 256 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2020-10-12 09:52:29,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188803683] [2020-10-12 09:52:29,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:29,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 09:52:29,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043429282] [2020-10-12 09:52:29,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 09:52:29,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:29,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 09:52:29,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:52:29,111 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand 20 states. [2020-10-12 09:52:29,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:29,479 INFO L93 Difference]: Finished difference Result 237 states and 246 transitions. [2020-10-12 09:52:29,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 09:52:29,479 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 131 [2020-10-12 09:52:29,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:29,480 INFO L225 Difference]: With dead ends: 237 [2020-10-12 09:52:29,480 INFO L226 Difference]: Without dead ends: 144 [2020-10-12 09:52:29,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:52:29,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-12 09:52:29,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2020-10-12 09:52:29,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-12 09:52:29,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 145 transitions. [2020-10-12 09:52:29,496 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 145 transitions. Word has length 131 [2020-10-12 09:52:29,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:29,496 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 145 transitions. [2020-10-12 09:52:29,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 09:52:29,496 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 145 transitions. [2020-10-12 09:52:29,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-12 09:52:29,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:29,497 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:29,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 09:52:29,498 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:29,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:29,498 INFO L82 PathProgramCache]: Analyzing trace with hash -595155786, now seen corresponding path program 18 times [2020-10-12 09:52:29,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:29,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523834499] [2020-10-12 09:52:29,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:29,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:29,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:29,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:29,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:32,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:34,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:34,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-12 09:52:34,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:52:34,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5202 [2020-10-12 09:52:34,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:34,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 09:52:34,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-12 09:52:34,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 09:52:34,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:34,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:34,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:34,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:34,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:34,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:34,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:34,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:34,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:34,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:34,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:34,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:34,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-10-12 09:52:34,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:34,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:34,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:34,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:34,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:34,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:52:34,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:34,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:34,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:52:34,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:34,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:34,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-10-12 09:52:34,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:34,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:34,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:34,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:34,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:34,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:52:34,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:34,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:34,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:52:34,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:34,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 883 backedges. 4 proven. 289 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-10-12 09:52:34,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523834499] [2020-10-12 09:52:34,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:34,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 09:52:34,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399299280] [2020-10-12 09:52:34,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 09:52:34,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:34,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 09:52:34,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:52:34,972 INFO L87 Difference]: Start difference. First operand 141 states and 145 transitions. Second operand 21 states. [2020-10-12 09:52:35,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:35,335 INFO L93 Difference]: Finished difference Result 247 states and 256 transitions. [2020-10-12 09:52:35,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 09:52:35,335 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 137 [2020-10-12 09:52:35,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:35,337 INFO L225 Difference]: With dead ends: 247 [2020-10-12 09:52:35,337 INFO L226 Difference]: Without dead ends: 150 [2020-10-12 09:52:35,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:52:35,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-12 09:52:35,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2020-10-12 09:52:35,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-12 09:52:35,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 151 transitions. [2020-10-12 09:52:35,350 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 151 transitions. Word has length 137 [2020-10-12 09:52:35,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:35,350 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 151 transitions. [2020-10-12 09:52:35,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 09:52:35,351 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 151 transitions. [2020-10-12 09:52:35,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-12 09:52:35,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:35,352 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:35,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 09:52:35,352 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:35,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:35,353 INFO L82 PathProgramCache]: Analyzing trace with hash 675024272, now seen corresponding path program 19 times [2020-10-12 09:52:35,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:35,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189975841] [2020-10-12 09:52:35,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:35,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:35,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:35,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:35,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:37,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:40,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:40,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-12 09:52:40,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:52:40,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-12 09:52:40,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:40,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 09:52:40,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-12 09:52:40,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 09:52:40,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:40,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:40,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:40,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:40,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:40,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:40,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:40,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:40,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:40,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:40,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:40,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:40,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:40,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-10-12 09:52:40,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:40,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:40,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:40,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:40,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:40,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:52:40,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:40,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:40,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:52:40,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:40,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:40,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-12 09:52:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:40,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:40,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:40,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:40,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:40,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:52:40,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:40,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:40,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:52:40,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:40,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:40,677 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 4 proven. 324 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-10-12 09:52:40,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189975841] [2020-10-12 09:52:40,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:40,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 09:52:40,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292729008] [2020-10-12 09:52:40,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 09:52:40,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:40,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 09:52:40,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:52:40,679 INFO L87 Difference]: Start difference. First operand 147 states and 151 transitions. Second operand 22 states. [2020-10-12 09:52:40,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:40,980 INFO L93 Difference]: Finished difference Result 257 states and 266 transitions. [2020-10-12 09:52:40,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 09:52:40,981 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 143 [2020-10-12 09:52:40,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:40,982 INFO L225 Difference]: With dead ends: 257 [2020-10-12 09:52:40,983 INFO L226 Difference]: Without dead ends: 156 [2020-10-12 09:52:40,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:52:40,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-12 09:52:40,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2020-10-12 09:52:40,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-12 09:52:41,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 157 transitions. [2020-10-12 09:52:41,000 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 157 transitions. Word has length 143 [2020-10-12 09:52:41,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:41,000 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 157 transitions. [2020-10-12 09:52:41,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 09:52:41,001 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 157 transitions. [2020-10-12 09:52:41,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-12 09:52:41,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:41,002 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:41,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 09:52:41,002 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:41,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:41,003 INFO L82 PathProgramCache]: Analyzing trace with hash 2007345898, now seen corresponding path program 20 times [2020-10-12 09:52:41,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:41,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592610388] [2020-10-12 09:52:41,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:41,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:41,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:41,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:41,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:46,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:46,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-12 09:52:46,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:52:46,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-12 09:52:46,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:46,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 09:52:46,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-12 09:52:46,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 09:52:46,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:46,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:46,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:46,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:46,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:46,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:46,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:46,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:46,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:46,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:46,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:46,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:46,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:46,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-10-12 09:52:46,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:46,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:46,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:46,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:46,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:46,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:52:46,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:46,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:46,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:52:46,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:46,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:46,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-12 09:52:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:46,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:46,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:46,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:46,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:46,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:52:46,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:46,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:46,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:52:46,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:46,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:46,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1099 backedges. 4 proven. 361 refuted. 0 times theorem prover too weak. 734 trivial. 0 not checked. [2020-10-12 09:52:46,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592610388] [2020-10-12 09:52:46,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:46,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 09:52:46,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829172353] [2020-10-12 09:52:46,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 09:52:46,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:46,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 09:52:46,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:52:46,354 INFO L87 Difference]: Start difference. First operand 153 states and 157 transitions. Second operand 23 states. [2020-10-12 09:52:46,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:46,750 INFO L93 Difference]: Finished difference Result 267 states and 276 transitions. [2020-10-12 09:52:46,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 09:52:46,750 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 149 [2020-10-12 09:52:46,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:46,752 INFO L225 Difference]: With dead ends: 267 [2020-10-12 09:52:46,752 INFO L226 Difference]: Without dead ends: 162 [2020-10-12 09:52:46,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:52:46,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-12 09:52:46,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2020-10-12 09:52:46,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-12 09:52:46,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 163 transitions. [2020-10-12 09:52:46,770 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 163 transitions. Word has length 149 [2020-10-12 09:52:46,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:46,770 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 163 transitions. [2020-10-12 09:52:46,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 09:52:46,771 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 163 transitions. [2020-10-12 09:52:46,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-12 09:52:46,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:46,772 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:46,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 09:52:46,772 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:46,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:46,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1660805948, now seen corresponding path program 21 times [2020-10-12 09:52:46,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:46,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367686210] [2020-10-12 09:52:46,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:46,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:46,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:46,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:46,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:52,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:52,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-12 09:52:52,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:52:52,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5446 [2020-10-12 09:52:52,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:52,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 09:52:52,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:52:52,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 09:52:52,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:52,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:52,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:52,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:52,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:52,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:52,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:52,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:52,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:52,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:52,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:52,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:52,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-10-12 09:52:52,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:52,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:52,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:52,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:52,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:52,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:52:52,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:52,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:52,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:52:52,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:52,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:52,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-10-12 09:52:52,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:52,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:52,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:52,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:52,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:52,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:52:52,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:52,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:52,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:52:52,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:52,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:52,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 4 proven. 400 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2020-10-12 09:52:52,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367686210] [2020-10-12 09:52:52,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:52,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 09:52:52,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333734849] [2020-10-12 09:52:52,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 09:52:52,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:52,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 09:52:52,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:52:52,547 INFO L87 Difference]: Start difference. First operand 159 states and 163 transitions. Second operand 24 states. [2020-10-12 09:52:52,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:52,958 INFO L93 Difference]: Finished difference Result 277 states and 286 transitions. [2020-10-12 09:52:52,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 09:52:52,959 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 155 [2020-10-12 09:52:52,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:52,961 INFO L225 Difference]: With dead ends: 277 [2020-10-12 09:52:52,961 INFO L226 Difference]: Without dead ends: 168 [2020-10-12 09:52:52,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:52:52,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-12 09:52:52,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 165. [2020-10-12 09:52:52,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-12 09:52:52,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 169 transitions. [2020-10-12 09:52:52,978 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 169 transitions. Word has length 155 [2020-10-12 09:52:52,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:52,978 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 169 transitions. [2020-10-12 09:52:52,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 09:52:52,978 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 169 transitions. [2020-10-12 09:52:52,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-12 09:52:52,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:52,979 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:52,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 09:52:52,980 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:52,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:52,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1088945378, now seen corresponding path program 22 times [2020-10-12 09:52:52,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:52,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984377555] [2020-10-12 09:52:52,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:52,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:52,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:53,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:53,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:57,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:57,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-12 09:52:57,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:52:57,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 09:52:57,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:57,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 09:52:57,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:52:57,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 09:52:57,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:58,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:58,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:58,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:58,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:58,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:58,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:52:58,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:58,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:58,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:58,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:58,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:58,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-10-12 09:52:58,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:58,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:58,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:58,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:58,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:58,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:52:58,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:58,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:58,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:52:58,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:58,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:58,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-10-12 09:52:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:58,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:58,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:58,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:58,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:58,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:52:58,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:58,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:58,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:52:58,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:58,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1339 backedges. 4 proven. 441 refuted. 0 times theorem prover too weak. 894 trivial. 0 not checked. [2020-10-12 09:52:58,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984377555] [2020-10-12 09:52:58,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:58,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 09:52:58,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603042206] [2020-10-12 09:52:58,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 09:52:58,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:58,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 09:52:58,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:52:58,345 INFO L87 Difference]: Start difference. First operand 165 states and 169 transitions. Second operand 25 states. [2020-10-12 09:52:58,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:58,718 INFO L93 Difference]: Finished difference Result 287 states and 296 transitions. [2020-10-12 09:52:58,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 09:52:58,719 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 161 [2020-10-12 09:52:58,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:58,721 INFO L225 Difference]: With dead ends: 287 [2020-10-12 09:52:58,721 INFO L226 Difference]: Without dead ends: 174 [2020-10-12 09:52:58,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:52:58,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-12 09:52:58,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 171. [2020-10-12 09:52:58,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-12 09:52:58,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 175 transitions. [2020-10-12 09:52:58,739 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 175 transitions. Word has length 161 [2020-10-12 09:52:58,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:58,740 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 175 transitions. [2020-10-12 09:52:58,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 09:52:58,740 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 175 transitions. [2020-10-12 09:52:58,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-12 09:52:58,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:58,741 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:58,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 09:52:58,741 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:58,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:58,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1396047352, now seen corresponding path program 23 times [2020-10-12 09:52:58,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:58,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392342298] [2020-10-12 09:52:58,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:58,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:58,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:58,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:58,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:03,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:03,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-12 09:53:03,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:53:03,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-12 09:53:03,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:03,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 09:53:03,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-12 09:53:03,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 09:53:03,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:04,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:04,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:04,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:04,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:04,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:04,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:04,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:04,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:04,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:04,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:04,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:04,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:04,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-10-12 09:53:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:04,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:04,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:04,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:53:04,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:04,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:53:04,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:04,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:04,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:53:04,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:04,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:04,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-12 09:53:04,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:04,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:04,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:04,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:53:04,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:04,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:53:04,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:04,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:04,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:53:04,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:04,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:04,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1468 backedges. 4 proven. 484 refuted. 0 times theorem prover too weak. 980 trivial. 0 not checked. [2020-10-12 09:53:04,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392342298] [2020-10-12 09:53:04,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:04,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 09:53:04,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093567599] [2020-10-12 09:53:04,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 09:53:04,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:04,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 09:53:04,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:53:04,179 INFO L87 Difference]: Start difference. First operand 171 states and 175 transitions. Second operand 26 states. [2020-10-12 09:53:04,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:04,604 INFO L93 Difference]: Finished difference Result 297 states and 306 transitions. [2020-10-12 09:53:04,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 09:53:04,604 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 167 [2020-10-12 09:53:04,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:04,606 INFO L225 Difference]: With dead ends: 297 [2020-10-12 09:53:04,606 INFO L226 Difference]: Without dead ends: 180 [2020-10-12 09:53:04,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:53:04,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-12 09:53:04,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2020-10-12 09:53:04,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-12 09:53:04,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 181 transitions. [2020-10-12 09:53:04,625 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 181 transitions. Word has length 167 [2020-10-12 09:53:04,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:04,625 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 181 transitions. [2020-10-12 09:53:04,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 09:53:04,625 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 181 transitions. [2020-10-12 09:53:04,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-12 09:53:04,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:04,626 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:04,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 09:53:04,627 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:04,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:04,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1758286510, now seen corresponding path program 24 times [2020-10-12 09:53:04,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:04,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509875312] [2020-10-12 09:53:04,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:04,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:04,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:04,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:04,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:09,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:09,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-12 09:53:09,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:53:09,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-12 09:53:09,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:09,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 09:53:09,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:09,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 09:53:09,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:10,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:10,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:10,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:10,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:10,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:10,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:10,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:10,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:10,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:10,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:10,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:10,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:53:10,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-12 09:53:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:10,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:10,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:10,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:53:10,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:10,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:10,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:10,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:10,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:53:10,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:10,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:53:10,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-10-12 09:53:10,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:10,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:10,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:10,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:53:10,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:10,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:10,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:10,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:10,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:53:10,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:10,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:53:10,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1603 backedges. 4 proven. 529 refuted. 0 times theorem prover too weak. 1070 trivial. 0 not checked. [2020-10-12 09:53:10,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509875312] [2020-10-12 09:53:10,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:10,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 09:53:10,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463937443] [2020-10-12 09:53:10,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 09:53:10,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:10,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 09:53:10,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:53:10,147 INFO L87 Difference]: Start difference. First operand 177 states and 181 transitions. Second operand 27 states. [2020-10-12 09:53:10,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:10,786 INFO L93 Difference]: Finished difference Result 307 states and 316 transitions. [2020-10-12 09:53:10,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 09:53:10,786 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 173 [2020-10-12 09:53:10,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:10,788 INFO L225 Difference]: With dead ends: 307 [2020-10-12 09:53:10,789 INFO L226 Difference]: Without dead ends: 186 [2020-10-12 09:53:10,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:53:10,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-12 09:53:10,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 183. [2020-10-12 09:53:10,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-12 09:53:10,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 187 transitions. [2020-10-12 09:53:10,824 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 187 transitions. Word has length 173 [2020-10-12 09:53:10,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:10,825 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 187 transitions. [2020-10-12 09:53:10,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 09:53:10,825 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 187 transitions. [2020-10-12 09:53:10,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-12 09:53:10,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:10,826 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:10,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 09:53:10,827 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:10,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:10,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1955811028, now seen corresponding path program 25 times [2020-10-12 09:53:10,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:10,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067115440] [2020-10-12 09:53:10,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:10,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:10,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:10,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:11,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:16,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:16,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-12 09:53:16,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:53:16,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5233 [2020-10-12 09:53:16,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:16,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 09:53:16,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-12 09:53:16,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 09:53:16,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:16,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:16,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:16,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:16,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:16,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:16,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:16,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:16,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:16,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:16,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:16,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:16,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:16,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2020-10-12 09:53:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:16,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:16,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:16,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:53:16,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:16,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:16,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:16,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:16,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:53:16,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:16,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:53:16,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-10-12 09:53:16,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:16,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:16,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:16,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:53:16,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:16,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:16,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:16,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:16,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:53:16,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:16,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:53:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1744 backedges. 4 proven. 576 refuted. 0 times theorem prover too weak. 1164 trivial. 0 not checked. [2020-10-12 09:53:16,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067115440] [2020-10-12 09:53:16,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:16,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 09:53:16,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671777053] [2020-10-12 09:53:16,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 09:53:16,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:16,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 09:53:16,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:53:16,589 INFO L87 Difference]: Start difference. First operand 183 states and 187 transitions. Second operand 28 states. [2020-10-12 09:53:17,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:17,266 INFO L93 Difference]: Finished difference Result 317 states and 326 transitions. [2020-10-12 09:53:17,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 09:53:17,267 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 179 [2020-10-12 09:53:17,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:17,268 INFO L225 Difference]: With dead ends: 317 [2020-10-12 09:53:17,269 INFO L226 Difference]: Without dead ends: 192 [2020-10-12 09:53:17,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:53:17,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-12 09:53:17,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2020-10-12 09:53:17,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-12 09:53:17,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 193 transitions. [2020-10-12 09:53:17,294 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 193 transitions. Word has length 179 [2020-10-12 09:53:17,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:17,294 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 193 transitions. [2020-10-12 09:53:17,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 09:53:17,295 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 193 transitions. [2020-10-12 09:53:17,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-12 09:53:17,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:17,297 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:17,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 09:53:17,297 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:17,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:17,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1825220998, now seen corresponding path program 26 times [2020-10-12 09:53:17,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:17,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820938194] [2020-10-12 09:53:17,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:17,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:17,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:17,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:17,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:22,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:22,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-10-12 09:53:22,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:53:22,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5121 [2020-10-12 09:53:22,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:22,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 09:53:22,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-12 09:53:22,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 09:53:22,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:22,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:22,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:22,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:22,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:22,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:22,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:22,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:22,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:22,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:22,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:22,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:22,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:22,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2020-10-12 09:53:22,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:22,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:22,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:22,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:53:22,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:22,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:22,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:22,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:22,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:53:22,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:22,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:22,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-10-12 09:53:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:22,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:22,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:22,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:53:22,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:22,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:22,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:22,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:22,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:53:22,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:22,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:53:22,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 4 proven. 625 refuted. 0 times theorem prover too weak. 1262 trivial. 0 not checked. [2020-10-12 09:53:22,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820938194] [2020-10-12 09:53:22,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:22,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 09:53:22,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146289819] [2020-10-12 09:53:22,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 09:53:22,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:22,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 09:53:22,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:53:22,996 INFO L87 Difference]: Start difference. First operand 189 states and 193 transitions. Second operand 29 states. [2020-10-12 09:53:23,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:23,472 INFO L93 Difference]: Finished difference Result 327 states and 336 transitions. [2020-10-12 09:53:23,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 09:53:23,473 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 185 [2020-10-12 09:53:23,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:23,475 INFO L225 Difference]: With dead ends: 327 [2020-10-12 09:53:23,475 INFO L226 Difference]: Without dead ends: 198 [2020-10-12 09:53:23,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:53:23,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-12 09:53:23,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 195. [2020-10-12 09:53:23,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-12 09:53:23,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 199 transitions. [2020-10-12 09:53:23,498 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 199 transitions. Word has length 185 [2020-10-12 09:53:23,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:23,498 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 199 transitions. [2020-10-12 09:53:23,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 09:53:23,499 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 199 transitions. [2020-10-12 09:53:23,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-12 09:53:23,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:23,500 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:23,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 09:53:23,501 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:23,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:23,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1363462560, now seen corresponding path program 27 times [2020-10-12 09:53:23,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:23,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516482280] [2020-10-12 09:53:23,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:23,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:23,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:23,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:28,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:28,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-12 09:53:28,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:53:28,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-12 09:53:28,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:28,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 09:53:28,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:28,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 09:53:28,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:29,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:29,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:29,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:29,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:29,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:29,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:29,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:29,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:29,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:29,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:29,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:29,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:29,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-10-12 09:53:29,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:29,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:29,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:29,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:53:29,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:29,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:29,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:29,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:29,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:53:29,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:29,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:29,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-10-12 09:53:29,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:29,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:29,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:29,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:53:29,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:29,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:29,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:29,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:29,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:53:29,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:29,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:29,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2044 backedges. 4 proven. 676 refuted. 0 times theorem prover too weak. 1364 trivial. 0 not checked. [2020-10-12 09:53:29,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516482280] [2020-10-12 09:53:29,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:29,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 09:53:29,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130747511] [2020-10-12 09:53:29,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 09:53:29,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:29,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 09:53:29,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:53:29,104 INFO L87 Difference]: Start difference. First operand 195 states and 199 transitions. Second operand 30 states. [2020-10-12 09:53:29,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:29,636 INFO L93 Difference]: Finished difference Result 337 states and 346 transitions. [2020-10-12 09:53:29,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 09:53:29,636 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 191 [2020-10-12 09:53:29,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:29,638 INFO L225 Difference]: With dead ends: 337 [2020-10-12 09:53:29,638 INFO L226 Difference]: Without dead ends: 204 [2020-10-12 09:53:29,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:53:29,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-12 09:53:29,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 201. [2020-10-12 09:53:29,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-12 09:53:29,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 205 transitions. [2020-10-12 09:53:29,658 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 205 transitions. Word has length 191 [2020-10-12 09:53:29,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:29,659 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 205 transitions. [2020-10-12 09:53:29,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 09:53:29,659 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 205 transitions. [2020-10-12 09:53:29,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-12 09:53:29,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:29,661 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:29,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 09:53:29,661 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:29,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:29,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1966405562, now seen corresponding path program 28 times [2020-10-12 09:53:29,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:29,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670507670] [2020-10-12 09:53:29,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:29,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:29,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:29,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:29,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:34,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:34,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-12 09:53:34,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:53:34,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5184 [2020-10-12 09:53:34,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:34,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 09:53:34,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-12 09:53:34,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 09:53:34,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:35,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:35,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:35,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:35,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:35,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:35,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:35,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:35,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:35,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:35,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:35,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:35,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:35,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-10-12 09:53:35,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:35,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:35,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:35,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:53:35,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:35,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:53:35,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:35,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:35,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:53:35,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:35,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:35,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2020-10-12 09:53:35,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:35,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:35,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:35,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:53:35,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:35,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:53:35,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:35,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:35,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:53:35,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:35,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2203 backedges. 4 proven. 729 refuted. 0 times theorem prover too weak. 1470 trivial. 0 not checked. [2020-10-12 09:53:35,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670507670] [2020-10-12 09:53:35,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:35,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 09:53:35,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862010939] [2020-10-12 09:53:35,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 09:53:35,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:35,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 09:53:35,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:53:35,382 INFO L87 Difference]: Start difference. First operand 201 states and 205 transitions. Second operand 31 states. [2020-10-12 09:53:35,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:35,980 INFO L93 Difference]: Finished difference Result 347 states and 356 transitions. [2020-10-12 09:53:35,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 09:53:35,980 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 197 [2020-10-12 09:53:35,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:35,982 INFO L225 Difference]: With dead ends: 347 [2020-10-12 09:53:35,982 INFO L226 Difference]: Without dead ends: 210 [2020-10-12 09:53:35,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:53:35,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-12 09:53:36,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 207. [2020-10-12 09:53:36,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-12 09:53:36,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 211 transitions. [2020-10-12 09:53:36,007 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 211 transitions. Word has length 197 [2020-10-12 09:53:36,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:36,007 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 211 transitions. [2020-10-12 09:53:36,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 09:53:36,007 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 211 transitions. [2020-10-12 09:53:36,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-12 09:53:36,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:36,009 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:36,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 09:53:36,010 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:36,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:36,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1900638828, now seen corresponding path program 29 times [2020-10-12 09:53:36,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:36,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530718908] [2020-10-12 09:53:36,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:36,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:36,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:36,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:36,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:41,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:41,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-12 09:53:41,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:53:41,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5124 [2020-10-12 09:53:41,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:41,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 09:53:41,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-12 09:53:41,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 09:53:41,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:41,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:41,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:41,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:41,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:41,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:41,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:41,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:41,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:41,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:41,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:41,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:41,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:41,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-10-12 09:53:41,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:41,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:41,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:41,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:53:41,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:41,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:53:41,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:41,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:41,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:53:41,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:41,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:41,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2020-10-12 09:53:41,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:41,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:41,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:41,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:53:41,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:41,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:53:41,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:41,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:41,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:53:41,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:41,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:41,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2368 backedges. 4 proven. 784 refuted. 0 times theorem prover too weak. 1580 trivial. 0 not checked. [2020-10-12 09:53:41,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530718908] [2020-10-12 09:53:41,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:41,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 09:53:41,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718437193] [2020-10-12 09:53:41,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 09:53:41,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:41,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 09:53:41,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:53:41,709 INFO L87 Difference]: Start difference. First operand 207 states and 211 transitions. Second operand 32 states. [2020-10-12 09:53:42,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:42,332 INFO L93 Difference]: Finished difference Result 357 states and 366 transitions. [2020-10-12 09:53:42,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 09:53:42,333 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 203 [2020-10-12 09:53:42,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:42,334 INFO L225 Difference]: With dead ends: 357 [2020-10-12 09:53:42,334 INFO L226 Difference]: Without dead ends: 216 [2020-10-12 09:53:42,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:53:42,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-12 09:53:42,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 213. [2020-10-12 09:53:42,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-12 09:53:42,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 217 transitions. [2020-10-12 09:53:42,363 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 217 transitions. Word has length 203 [2020-10-12 09:53:42,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:42,363 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 217 transitions. [2020-10-12 09:53:42,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 09:53:42,363 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 217 transitions. [2020-10-12 09:53:42,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-12 09:53:42,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:42,365 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:42,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 09:53:42,365 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:42,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:42,366 INFO L82 PathProgramCache]: Analyzing trace with hash -297363474, now seen corresponding path program 30 times [2020-10-12 09:53:42,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:42,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164949142] [2020-10-12 09:53:42,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:42,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:42,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:42,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:42,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:47,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:47,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-12 09:53:47,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:53:47,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5197 [2020-10-12 09:53:47,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:47,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 09:53:47,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-12 09:53:47,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 09:53:47,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:48,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:48,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:48,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:48,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:48,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:48,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:48,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:48,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:48,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:48,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:48,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:48,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:48,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2020-10-12 09:53:48,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:48,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:48,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:48,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:53:48,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:48,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:53:48,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:48,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:48,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:53:48,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:48,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:48,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-10-12 09:53:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:48,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:48,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:48,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:53:48,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:48,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:53:48,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:48,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:48,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:53:48,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:48,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:48,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2539 backedges. 4 proven. 841 refuted. 0 times theorem prover too weak. 1694 trivial. 0 not checked. [2020-10-12 09:53:48,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164949142] [2020-10-12 09:53:48,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:48,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 09:53:48,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217968836] [2020-10-12 09:53:48,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 09:53:48,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:48,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 09:53:48,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:53:48,170 INFO L87 Difference]: Start difference. First operand 213 states and 217 transitions. Second operand 33 states. [2020-10-12 09:53:48,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:48,719 INFO L93 Difference]: Finished difference Result 367 states and 376 transitions. [2020-10-12 09:53:48,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 09:53:48,720 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 209 [2020-10-12 09:53:48,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:48,722 INFO L225 Difference]: With dead ends: 367 [2020-10-12 09:53:48,722 INFO L226 Difference]: Without dead ends: 222 [2020-10-12 09:53:48,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:53:48,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-12 09:53:48,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 219. [2020-10-12 09:53:48,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-12 09:53:48,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 223 transitions. [2020-10-12 09:53:48,744 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 223 transitions. Word has length 209 [2020-10-12 09:53:48,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:48,745 INFO L479 AbstractCegarLoop]: Abstraction has 219 states and 223 transitions. [2020-10-12 09:53:48,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 09:53:48,745 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 223 transitions. [2020-10-12 09:53:48,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-10-12 09:53:48,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:48,746 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:48,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 09:53:48,747 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:48,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:48,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1519143224, now seen corresponding path program 31 times [2020-10-12 09:53:48,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:48,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52878900] [2020-10-12 09:53:48,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:48,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:48,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:48,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:48,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:54,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:54,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 227 [2020-10-12 09:53:54,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:53:54,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5311 [2020-10-12 09:53:54,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:54,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 09:53:54,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:54,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 09:53:54,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:54,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:54,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:54,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:54,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:54,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:54,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:54,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:54,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:54,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:54,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:54,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:54,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:54,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-10-12 09:53:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:54,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:54,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:54,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:53:54,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:54,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:53:54,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:54,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:54,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:53:54,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:54,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:54,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2020-10-12 09:53:54,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:54,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:54,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:54,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:53:54,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:54,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:53:54,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:54,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:54,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:53:54,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:54,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:54,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2716 backedges. 4 proven. 900 refuted. 0 times theorem prover too weak. 1812 trivial. 0 not checked. [2020-10-12 09:53:54,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52878900] [2020-10-12 09:53:54,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:54,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 09:53:54,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519140250] [2020-10-12 09:53:54,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 09:53:54,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:54,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 09:53:54,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:53:54,667 INFO L87 Difference]: Start difference. First operand 219 states and 223 transitions. Second operand 34 states. [2020-10-12 09:53:55,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:55,301 INFO L93 Difference]: Finished difference Result 377 states and 386 transitions. [2020-10-12 09:53:55,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 09:53:55,303 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 215 [2020-10-12 09:53:55,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:55,305 INFO L225 Difference]: With dead ends: 377 [2020-10-12 09:53:55,305 INFO L226 Difference]: Without dead ends: 228 [2020-10-12 09:53:55,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:53:55,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-12 09:53:55,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 225. [2020-10-12 09:53:55,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-10-12 09:53:55,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 229 transitions. [2020-10-12 09:53:55,329 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 229 transitions. Word has length 215 [2020-10-12 09:53:55,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:55,329 INFO L479 AbstractCegarLoop]: Abstraction has 225 states and 229 transitions. [2020-10-12 09:53:55,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 09:53:55,329 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 229 transitions. [2020-10-12 09:53:55,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-12 09:53:55,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:55,331 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:55,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 09:53:55,331 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:55,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:55,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1582598690, now seen corresponding path program 32 times [2020-10-12 09:53:55,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:55,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530007047] [2020-10-12 09:53:55,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:55,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:55,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:55,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:00,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:00,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-12 09:54:00,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:54:00,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5250 [2020-10-12 09:54:00,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:00,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 09:54:00,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-12 09:54:00,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 09:54:00,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:01,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:01,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:01,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:01,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:01,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:01,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:01,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:01,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:01,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:01,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:01,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:01,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:01,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2020-10-12 09:54:01,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:01,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:01,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:01,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:54:01,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:01,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:54:01,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:01,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:01,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:54:01,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:01,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:01,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-10-12 09:54:01,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:01,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:01,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:01,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:54:01,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:01,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:54:01,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:01,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:01,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:54:01,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:01,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:01,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2899 backedges. 4 proven. 961 refuted. 0 times theorem prover too weak. 1934 trivial. 0 not checked. [2020-10-12 09:54:01,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530007047] [2020-10-12 09:54:01,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:01,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 09:54:01,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177016051] [2020-10-12 09:54:01,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 09:54:01,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:01,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 09:54:01,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:54:01,260 INFO L87 Difference]: Start difference. First operand 225 states and 229 transitions. Second operand 35 states. [2020-10-12 09:54:01,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:01,818 INFO L93 Difference]: Finished difference Result 387 states and 396 transitions. [2020-10-12 09:54:01,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 09:54:01,819 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 221 [2020-10-12 09:54:01,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:01,820 INFO L225 Difference]: With dead ends: 387 [2020-10-12 09:54:01,820 INFO L226 Difference]: Without dead ends: 234 [2020-10-12 09:54:01,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:54:01,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-12 09:54:01,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 231. [2020-10-12 09:54:01,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-12 09:54:01,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 235 transitions. [2020-10-12 09:54:01,841 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 235 transitions. Word has length 221 [2020-10-12 09:54:01,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:01,842 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 235 transitions. [2020-10-12 09:54:01,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 09:54:01,842 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 235 transitions. [2020-10-12 09:54:01,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-12 09:54:01,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:01,843 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:01,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 09:54:01,843 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:01,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:01,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1434956284, now seen corresponding path program 33 times [2020-10-12 09:54:01,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:01,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039352944] [2020-10-12 09:54:01,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:01,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:01,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:01,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:01,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:06,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:06,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-10-12 09:54:06,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:54:06,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5097 [2020-10-12 09:54:06,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:06,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 09:54:06,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:54:06,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 09:54:06,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:07,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:07,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:07,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:07,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:07,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:07,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:07,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:07,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:07,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:07,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:07,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:07,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:07,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2020-10-12 09:54:07,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:07,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:07,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:07,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:54:07,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:07,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:54:07,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:07,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:07,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:54:07,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:07,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:07,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2020-10-12 09:54:07,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:07,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:07,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:07,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:54:07,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:07,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:54:07,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:07,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:07,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:54:07,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:07,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:07,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3088 backedges. 4 proven. 1024 refuted. 0 times theorem prover too weak. 2060 trivial. 0 not checked. [2020-10-12 09:54:07,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039352944] [2020-10-12 09:54:07,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:07,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 09:54:07,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935284997] [2020-10-12 09:54:07,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 09:54:07,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:07,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 09:54:07,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:54:07,623 INFO L87 Difference]: Start difference. First operand 231 states and 235 transitions. Second operand 36 states. [2020-10-12 09:54:08,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:08,142 INFO L93 Difference]: Finished difference Result 397 states and 406 transitions. [2020-10-12 09:54:08,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 09:54:08,142 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 227 [2020-10-12 09:54:08,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:08,144 INFO L225 Difference]: With dead ends: 397 [2020-10-12 09:54:08,144 INFO L226 Difference]: Without dead ends: 240 [2020-10-12 09:54:08,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:54:08,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-12 09:54:08,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 237. [2020-10-12 09:54:08,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-12 09:54:08,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 241 transitions. [2020-10-12 09:54:08,171 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 241 transitions. Word has length 227 [2020-10-12 09:54:08,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:08,171 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 241 transitions. [2020-10-12 09:54:08,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 09:54:08,172 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 241 transitions. [2020-10-12 09:54:08,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-12 09:54:08,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:08,174 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:08,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 09:54:08,174 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:08,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:08,174 INFO L82 PathProgramCache]: Analyzing trace with hash -734802346, now seen corresponding path program 34 times [2020-10-12 09:54:08,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:08,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993376563] [2020-10-12 09:54:08,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:08,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:08,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:08,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:08,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:13,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:13,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-10-12 09:54:13,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:54:13,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5533 [2020-10-12 09:54:13,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:13,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 09:54:13,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-12 09:54:13,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-12 09:54:13,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:14,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:14,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:14,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:14,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:14,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:14,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:14,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:14,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:14,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:14,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:14,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:14,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:14,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2020-10-12 09:54:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:14,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:14,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:14,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:54:14,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:14,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:54:14,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:14,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:14,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:54:14,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:14,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:14,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2020-10-12 09:54:14,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:14,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:14,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:14,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:54:14,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:14,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:54:14,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:14,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:14,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:54:14,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:14,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:14,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3283 backedges. 4 proven. 1089 refuted. 0 times theorem prover too weak. 2190 trivial. 0 not checked. [2020-10-12 09:54:14,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993376563] [2020-10-12 09:54:14,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:14,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 09:54:14,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614030118] [2020-10-12 09:54:14,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 09:54:14,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:14,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 09:54:14,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 09:54:14,482 INFO L87 Difference]: Start difference. First operand 237 states and 241 transitions. Second operand 37 states. [2020-10-12 09:54:15,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:15,111 INFO L93 Difference]: Finished difference Result 407 states and 416 transitions. [2020-10-12 09:54:15,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 09:54:15,112 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 233 [2020-10-12 09:54:15,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:15,113 INFO L225 Difference]: With dead ends: 407 [2020-10-12 09:54:15,113 INFO L226 Difference]: Without dead ends: 246 [2020-10-12 09:54:15,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 09:54:15,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-12 09:54:15,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2020-10-12 09:54:15,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-12 09:54:15,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 247 transitions. [2020-10-12 09:54:15,137 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 247 transitions. Word has length 233 [2020-10-12 09:54:15,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:15,137 INFO L479 AbstractCegarLoop]: Abstraction has 243 states and 247 transitions. [2020-10-12 09:54:15,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 09:54:15,137 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 247 transitions. [2020-10-12 09:54:15,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-12 09:54:15,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:15,139 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:15,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 09:54:15,139 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:15,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:15,140 INFO L82 PathProgramCache]: Analyzing trace with hash 705134384, now seen corresponding path program 35 times [2020-10-12 09:54:15,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:15,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473024399] [2020-10-12 09:54:15,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:15,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:15,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:15,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:15,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:20,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:20,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-12 09:54:20,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:54:20,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5481 [2020-10-12 09:54:20,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:20,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 09:54:20,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:54:20,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 09:54:20,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:21,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:21,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:21,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:21,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:21,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:21,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:21,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:21,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:21,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:21,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:21,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:21,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2020-10-12 09:54:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:21,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:21,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:21,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:54:21,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:21,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:54:21,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:21,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:21,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:54:21,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:21,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:21,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-10-12 09:54:21,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:21,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:21,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:21,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:54:21,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:21,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:54:21,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:21,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:21,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:54:21,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:21,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:21,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3484 backedges. 4 proven. 1156 refuted. 0 times theorem prover too weak. 2324 trivial. 0 not checked. [2020-10-12 09:54:21,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473024399] [2020-10-12 09:54:21,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:21,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 09:54:21,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060860858] [2020-10-12 09:54:21,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 09:54:21,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:21,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 09:54:21,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 09:54:21,412 INFO L87 Difference]: Start difference. First operand 243 states and 247 transitions. Second operand 38 states. [2020-10-12 09:54:22,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:22,059 INFO L93 Difference]: Finished difference Result 417 states and 426 transitions. [2020-10-12 09:54:22,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 09:54:22,060 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 239 [2020-10-12 09:54:22,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:22,062 INFO L225 Difference]: With dead ends: 417 [2020-10-12 09:54:22,062 INFO L226 Difference]: Without dead ends: 252 [2020-10-12 09:54:22,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 09:54:22,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-12 09:54:22,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 249. [2020-10-12 09:54:22,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-12 09:54:22,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 253 transitions. [2020-10-12 09:54:22,086 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 253 transitions. Word has length 239 [2020-10-12 09:54:22,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:22,086 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 253 transitions. [2020-10-12 09:54:22,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 09:54:22,086 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 253 transitions. [2020-10-12 09:54:22,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-12 09:54:22,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:22,088 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:22,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 09:54:22,088 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:22,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:22,089 INFO L82 PathProgramCache]: Analyzing trace with hash 658072714, now seen corresponding path program 36 times [2020-10-12 09:54:22,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:22,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062031641] [2020-10-12 09:54:22,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:22,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:22,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:22,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:22,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:27,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:27,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 257 [2020-10-12 09:54:27,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:54:27,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5203 [2020-10-12 09:54:27,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:27,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 09:54:27,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:54:27,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-12 09:54:27,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:28,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:28,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:28,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:28,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:28,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:28,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:28,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:28,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:28,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:28,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:28,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:28,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:28,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 225 [2020-10-12 09:54:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:28,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:28,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:28,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:54:28,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:28,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:54:28,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:28,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:28,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:54:28,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:28,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:28,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2020-10-12 09:54:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:28,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:28,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:28,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:54:28,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:28,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:54:28,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:28,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:28,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:54:28,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:28,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:28,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3691 backedges. 4 proven. 1225 refuted. 0 times theorem prover too weak. 2462 trivial. 0 not checked. [2020-10-12 09:54:28,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062031641] [2020-10-12 09:54:28,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:28,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 09:54:28,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544300533] [2020-10-12 09:54:28,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 09:54:28,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:28,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 09:54:28,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 09:54:28,128 INFO L87 Difference]: Start difference. First operand 249 states and 253 transitions. Second operand 39 states. [2020-10-12 09:54:28,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:28,826 INFO L93 Difference]: Finished difference Result 427 states and 436 transitions. [2020-10-12 09:54:28,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 09:54:28,827 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 245 [2020-10-12 09:54:28,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:28,829 INFO L225 Difference]: With dead ends: 427 [2020-10-12 09:54:28,829 INFO L226 Difference]: Without dead ends: 258 [2020-10-12 09:54:28,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 09:54:28,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-12 09:54:28,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 255. [2020-10-12 09:54:28,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-12 09:54:28,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 259 transitions. [2020-10-12 09:54:28,853 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 259 transitions. Word has length 245 [2020-10-12 09:54:28,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:28,854 INFO L479 AbstractCegarLoop]: Abstraction has 255 states and 259 transitions. [2020-10-12 09:54:28,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 09:54:28,854 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 259 transitions. [2020-10-12 09:54:28,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-12 09:54:28,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:28,856 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:28,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 09:54:28,856 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:28,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:28,856 INFO L82 PathProgramCache]: Analyzing trace with hash 378019428, now seen corresponding path program 37 times [2020-10-12 09:54:28,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:28,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478621132] [2020-10-12 09:54:28,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:28,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:28,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:28,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:28,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:34,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:34,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 263 [2020-10-12 09:54:34,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:54:34,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5983 [2020-10-12 09:54:34,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:34,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 09:54:34,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-12 09:54:34,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-12 09:54:34,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:35,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:35,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:35,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:35,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:35,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:35,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:35,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:35,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:35,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:35,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:35,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:35,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2020-10-12 09:54:35,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:35,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:35,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:35,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:54:35,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:35,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:35,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:35,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:35,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:54:35,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:35,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:35,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2020-10-12 09:54:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:35,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:35,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:35,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:54:35,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:35,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:54:35,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:35,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:35,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:54:35,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:35,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3904 backedges. 4 proven. 1296 refuted. 0 times theorem prover too weak. 2604 trivial. 0 not checked. [2020-10-12 09:54:35,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478621132] [2020-10-12 09:54:35,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:35,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 09:54:35,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839800412] [2020-10-12 09:54:35,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 09:54:35,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:35,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 09:54:35,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 09:54:35,723 INFO L87 Difference]: Start difference. First operand 255 states and 259 transitions. Second operand 40 states. [2020-10-12 09:54:36,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:36,445 INFO L93 Difference]: Finished difference Result 437 states and 446 transitions. [2020-10-12 09:54:36,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 09:54:36,446 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 251 [2020-10-12 09:54:36,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:36,448 INFO L225 Difference]: With dead ends: 437 [2020-10-12 09:54:36,448 INFO L226 Difference]: Without dead ends: 264 [2020-10-12 09:54:36,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 09:54:36,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-12 09:54:36,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 261. [2020-10-12 09:54:36,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-12 09:54:36,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 265 transitions. [2020-10-12 09:54:36,474 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 265 transitions. Word has length 251 [2020-10-12 09:54:36,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:36,474 INFO L479 AbstractCegarLoop]: Abstraction has 261 states and 265 transitions. [2020-10-12 09:54:36,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 09:54:36,475 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 265 transitions. [2020-10-12 09:54:36,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-12 09:54:36,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:36,476 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:36,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 09:54:36,477 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:36,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:36,477 INFO L82 PathProgramCache]: Analyzing trace with hash 926567614, now seen corresponding path program 38 times [2020-10-12 09:54:36,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:36,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208683738] [2020-10-12 09:54:36,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:36,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:36,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:36,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:36,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:41,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:41,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 269 [2020-10-12 09:54:41,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:54:41,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-12 09:54:41,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:41,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 09:54:41,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-12 09:54:41,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-12 09:54:41,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:42,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:42,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:42,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:42,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:42,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:42,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:42,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:42,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:42,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:42,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:42,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:42,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:42,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-10-12 09:54:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:42,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:42,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:42,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:54:42,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:42,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:54:42,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:42,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:42,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:54:42,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:42,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:42,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2020-10-12 09:54:42,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:42,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:42,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:42,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:54:42,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:42,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:54:42,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:42,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:42,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:54:42,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:42,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:42,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4123 backedges. 4 proven. 1369 refuted. 0 times theorem prover too weak. 2750 trivial. 0 not checked. [2020-10-12 09:54:42,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208683738] [2020-10-12 09:54:42,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:42,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 09:54:42,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806671232] [2020-10-12 09:54:42,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 09:54:42,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:42,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 09:54:42,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 09:54:42,449 INFO L87 Difference]: Start difference. First operand 261 states and 265 transitions. Second operand 41 states. [2020-10-12 09:54:43,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:43,217 INFO L93 Difference]: Finished difference Result 447 states and 456 transitions. [2020-10-12 09:54:43,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 09:54:43,218 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 257 [2020-10-12 09:54:43,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:43,221 INFO L225 Difference]: With dead ends: 447 [2020-10-12 09:54:43,221 INFO L226 Difference]: Without dead ends: 270 [2020-10-12 09:54:43,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 09:54:43,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-12 09:54:43,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 267. [2020-10-12 09:54:43,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-10-12 09:54:43,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 271 transitions. [2020-10-12 09:54:43,242 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 271 transitions. Word has length 257 [2020-10-12 09:54:43,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:43,243 INFO L479 AbstractCegarLoop]: Abstraction has 267 states and 271 transitions. [2020-10-12 09:54:43,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 09:54:43,243 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 271 transitions. [2020-10-12 09:54:43,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-10-12 09:54:43,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:43,245 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:43,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 09:54:43,245 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:43,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:43,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1222733928, now seen corresponding path program 39 times [2020-10-12 09:54:43,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:43,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809625736] [2020-10-12 09:54:43,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:43,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:43,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:43,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:43,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking...