/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 SingleStatement --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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 19:17:51,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 19:17:51,793 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 19:17:51,820 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 19:17:51,820 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 19:17:51,822 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 19:17:51,823 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 19:17:51,825 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 19:17:51,827 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 19:17:51,828 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 19:17:51,829 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 19:17:51,830 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 19:17:51,831 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 19:17:51,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 19:17:51,833 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 19:17:51,834 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 19:17:51,835 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 19:17:51,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 19:17:51,838 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 19:17:51,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 19:17:51,842 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 19:17:51,844 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 19:17:51,848 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 19:17:51,849 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 19:17:51,854 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 19:17:51,854 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 19:17:51,854 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 19:17:51,857 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 19:17:51,857 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 19:17:51,860 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 19:17:51,860 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 19:17:51,861 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 19:17:51,862 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 19:17:51,863 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 19:17:51,865 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 19:17:51,865 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 19:17:51,866 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 19:17:51,866 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 19:17:51,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 19:17:51,868 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 19:17:51,869 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 19:17:51,870 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 [2020-09-24 19:17:51,932 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 19:17:51,932 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 19:17:51,935 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 19:17:51,935 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 19:17:51,935 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 19:17:51,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 19:17:51,936 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 19:17:51,936 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 19:17:51,936 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 19:17:51,936 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 19:17:51,936 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 19:17:51,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 19:17:51,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 19:17:51,938 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 19:17:51,938 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 19:17:51,938 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 19:17:51,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 19:17:51,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 19:17:51,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 19:17:51,940 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 19:17:51,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 19:17:51,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 19:17:51,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 19:17:51,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 19:17:51,941 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 19:17:51,941 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 19:17:51,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 19:17:51,941 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 19:17:51,941 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 19:17:51,942 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 -> SingleStatement 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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 19:17:52,473 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 19:17:52,500 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 19:17:52,505 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 19:17:52,508 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 19:17:52,508 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 19:17:52,510 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-09-24 19:17:52,609 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a518e021a/3f67a12c78d64e35a3adf2e9df994f04/FLAGcfbc064ff [2020-09-24 19:17:53,188 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 19:17:53,189 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-09-24 19:17:53,198 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a518e021a/3f67a12c78d64e35a3adf2e9df994f04/FLAGcfbc064ff [2020-09-24 19:17:53,529 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a518e021a/3f67a12c78d64e35a3adf2e9df994f04 [2020-09-24 19:17:53,546 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 19:17:53,553 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 19:17:53,556 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 19:17:53,557 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 19:17:53,561 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 19:17:53,562 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:17:53" (1/1) ... [2020-09-24 19:17:53,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e09f978 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:17:53, skipping insertion in model container [2020-09-24 19:17:53,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:17:53" (1/1) ... [2020-09-24 19:17:53,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 19:17:53,636 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 19:17:53,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:17:53,974 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 19:17:54,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:17:54,151 INFO L208 MainTranslator]: Completed translation [2020-09-24 19:17:54,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:17:54 WrapperNode [2020-09-24 19:17:54,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 19:17:54,153 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 19:17:54,153 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 19:17:54,153 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 19:17:54,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:17:54" (1/1) ... [2020-09-24 19:17:54,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:17:54" (1/1) ... [2020-09-24 19:17:54,179 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:17:54" (1/1) ... [2020-09-24 19:17:54,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:17:54" (1/1) ... [2020-09-24 19:17:54,191 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:17:54" (1/1) ... [2020-09-24 19:17:54,201 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:17:54" (1/1) ... [2020-09-24 19:17:54,203 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:17:54" (1/1) ... [2020-09-24 19:17:54,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 19:17:54,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 19:17:54,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 19:17:54,208 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 19:17:54,209 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:17:54" (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 [2020-09-24 19:17:54,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 19:17:54,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 19:17:54,291 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 19:17:54,291 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-09-24 19:17:54,291 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-09-24 19:17:54,291 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-09-24 19:17:54,291 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 19:17:54,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 19:17:54,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 19:17:54,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 19:17:54,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 19:17:54,293 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-09-24 19:17:54,293 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-09-24 19:17:54,293 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-09-24 19:17:54,293 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 19:17:54,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 19:17:54,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 19:17:54,880 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 19:17:54,880 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-24 19:17:54,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:17:54 BoogieIcfgContainer [2020-09-24 19:17:54,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 19:17:54,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 19:17:54,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 19:17:54,893 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 19:17:54,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 07:17:53" (1/3) ... [2020-09-24 19:17:54,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23269d92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:17:54, skipping insertion in model container [2020-09-24 19:17:54,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:17:54" (2/3) ... [2020-09-24 19:17:54,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23269d92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:17:54, skipping insertion in model container [2020-09-24 19:17:54,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:17:54" (3/3) ... [2020-09-24 19:17:54,897 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2020-09-24 19:17:54,909 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 19:17:54,919 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 19:17:54,942 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 19:17:54,974 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 19:17:54,975 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 19:17:54,975 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 19:17:54,975 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 19:17:54,975 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 19:17:54,975 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 19:17:54,976 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 19:17:54,976 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 19:17:55,001 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states. [2020-09-24 19:17:55,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-09-24 19:17:55,015 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:17:55,016 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:17:55,017 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:17:55,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:17:55,023 INFO L82 PathProgramCache]: Analyzing trace with hash -2062280112, now seen corresponding path program 1 times [2020-09-24 19:17:55,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:17:55,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546350588] [2020-09-24 19:17:55,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:17:55,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:17:55,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:55,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:56,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:56,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:56,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:17:56,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-09-24 19:17:56,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:17:56,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1022 [2020-09-24 19:17:56,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:17:56,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:17:56,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-09-24 19:17:56,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 19:17:56,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 19:17:56,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:17:56,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:17:56,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:56,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:17:56,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:17:56,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:17:56,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:17:56,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:17:56,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:17:56,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:17:56,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:17:56,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:17:56,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 19:17:56,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:17:56,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:56,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:17:56,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:17:56,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:17:56,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:17:56,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:17:56,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:17:56,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:17:56,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:17:56,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:17:56,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 19:17:56,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:17:56,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:56,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:56,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:17:56,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:17:56,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:17:56,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 19:17:56,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:17:56,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:17:56,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:17:56,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:17:56,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:17:56,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-24 19:17:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:17:56,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:56,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:17:56,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:17:56,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:17:56,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:17:56,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:17:56,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:17:56,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:17:56,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:17:56,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:17:56,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-24 19:17:56,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:17:56,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:56,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:17:56,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:17:56,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:17:56,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:17:56,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:17:56,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:17:56,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:17:56,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:17:56,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:17:56,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-09-24 19:17:56,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:17:56,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:56,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:17:56,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 19:17:56,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:17:56,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 19:17:56,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:17:56,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:17:56,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:17:56,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 19:17:56,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:17:56,412 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-09-24 19:17:56,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546350588] [2020-09-24 19:17:56,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:17:56,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 19:17:56,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094368402] [2020-09-24 19:17:56,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 19:17:56,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:17:56,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 19:17:56,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 19:17:56,445 INFO L87 Difference]: Start difference. First operand 152 states. Second operand 3 states. [2020-09-24 19:17:56,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:17:56,512 INFO L93 Difference]: Finished difference Result 253 states and 309 transitions. [2020-09-24 19:17:56,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 19:17:56,514 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2020-09-24 19:17:56,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:17:56,530 INFO L225 Difference]: With dead ends: 253 [2020-09-24 19:17:56,530 INFO L226 Difference]: Without dead ends: 126 [2020-09-24 19:17:56,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 19:17:56,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-24 19:17:56,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-09-24 19:17:56,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-24 19:17:56,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 144 transitions. [2020-09-24 19:17:56,601 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 144 transitions. Word has length 100 [2020-09-24 19:17:56,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:17:56,604 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 144 transitions. [2020-09-24 19:17:56,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 19:17:56,605 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 144 transitions. [2020-09-24 19:17:56,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-09-24 19:17:56,610 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:17:56,610 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:17:56,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 19:17:56,611 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:17:56,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:17:56,612 INFO L82 PathProgramCache]: Analyzing trace with hash -2043535721, now seen corresponding path program 1 times [2020-09-24 19:17:56,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:17:56,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966342106] [2020-09-24 19:17:56,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:17:56,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:17:56,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:56,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:57,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:57,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:57,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:57,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:17:57,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-09-24 19:17:57,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 19:17:57,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1006 [2020-09-24 19:17:57,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:17:57,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:17:57,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 19:17:57,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 19:17:57,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:17:57,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:17:57,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:17:57,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:57,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:17:57,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:17:57,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:17:57,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 19:17:57,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:17:57,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:17:57,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:17:57,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:17:57,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:17:57,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 19:17:57,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:17:57,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:57,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:17:57,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:17:57,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:17:57,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:17:57,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:17:57,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:17:57,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:17:57,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:17:57,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:17:57,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 19:17:57,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:17:57,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:57,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:17:57,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:17:57,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:17:57,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 19:17:57,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:17:57,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:17:57,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 19:17:57,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 19:17:57,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:17:57,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-24 19:17:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:17:57,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:57,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:17:57,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:17:57,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:17:57,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 19:17:57,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:17:57,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:17:57,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 19:17:57,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:17:57,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:17:57,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-24 19:17:57,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:17:57,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:57,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:17:57,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:17:57,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:17:57,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 19:17:57,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:17:57,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:17:57,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 19:17:57,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:17:57,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:17:57,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-09-24 19:17:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:17:57,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:57,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:17:57,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 19:17:57,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:17:57,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 19:17:57,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:17:57,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:17:57,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 19:17:57,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:17:57,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:17:57,810 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 19:17:57,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966342106] [2020-09-24 19:17:57,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:17:57,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-24 19:17:57,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815774720] [2020-09-24 19:17:57,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 19:17:57,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:17:57,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 19:17:57,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:17:57,814 INFO L87 Difference]: Start difference. First operand 126 states and 144 transitions. Second operand 4 states. [2020-09-24 19:17:57,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:17:57,967 INFO L93 Difference]: Finished difference Result 265 states and 314 transitions. [2020-09-24 19:17:57,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 19:17:57,972 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 102 [2020-09-24 19:17:57,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:17:57,979 INFO L225 Difference]: With dead ends: 265 [2020-09-24 19:17:57,979 INFO L226 Difference]: Without dead ends: 167 [2020-09-24 19:17:57,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:17:57,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-09-24 19:17:58,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 144. [2020-09-24 19:17:58,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-24 19:17:58,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 167 transitions. [2020-09-24 19:17:58,020 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 167 transitions. Word has length 102 [2020-09-24 19:17:58,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:17:58,023 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 167 transitions. [2020-09-24 19:17:58,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 19:17:58,023 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 167 transitions. [2020-09-24 19:17:58,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-09-24 19:17:58,030 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:17:58,031 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:17:58,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 19:17:58,031 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:17:58,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:17:58,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1140538976, now seen corresponding path program 1 times [2020-09-24 19:17:58,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:17:58,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964616324] [2020-09-24 19:17:58,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:17:58,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:17:58,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:58,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:58,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:58,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:58,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:59,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:17:59,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-09-24 19:17:59,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 19:17:59,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1003 [2020-09-24 19:17:59,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:17:59,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:17:59,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 19:17:59,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 19:17:59,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:17:59,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:17:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:17:59,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:59,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:17:59,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:17:59,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:17:59,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:17:59,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:17:59,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:17:59,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:17:59,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:17:59,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:17:59,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 19:17:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:17:59,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:59,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:17:59,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:17:59,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:17:59,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:17:59,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:17:59,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:17:59,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:17:59,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:17:59,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:17:59,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 19:17:59,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:17:59,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:59,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:17:59,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 19:17:59,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:17:59,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-24 19:17:59,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:17:59,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:17:59,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 19:17:59,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 19:17:59,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:17:59,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 19:17:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:17:59,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:59,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:17:59,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:17:59,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:17:59,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 19:17:59,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:17:59,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:17:59,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 19:17:59,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:17:59,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:17:59,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-24 19:17:59,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:17:59,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:59,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:17:59,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:17:59,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:17:59,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:17:59,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:17:59,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:17:59,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 19:17:59,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:17:59,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:17:59,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-24 19:17:59,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:17:59,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:59,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:17:59,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 19:17:59,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:17:59,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 19:17:59,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:17:59,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:17:59,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 19:17:59,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:17:59,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:17:59,204 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 19:17:59,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964616324] [2020-09-24 19:17:59,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:17:59,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-24 19:17:59,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462281964] [2020-09-24 19:17:59,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 19:17:59,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:17:59,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 19:17:59,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:17:59,207 INFO L87 Difference]: Start difference. First operand 144 states and 167 transitions. Second operand 4 states. [2020-09-24 19:17:59,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:17:59,288 INFO L93 Difference]: Finished difference Result 276 states and 327 transitions. [2020-09-24 19:17:59,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 19:17:59,289 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-09-24 19:17:59,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:17:59,292 INFO L225 Difference]: With dead ends: 276 [2020-09-24 19:17:59,292 INFO L226 Difference]: Without dead ends: 168 [2020-09-24 19:17:59,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:17:59,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-09-24 19:17:59,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 156. [2020-09-24 19:17:59,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-24 19:17:59,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 183 transitions. [2020-09-24 19:17:59,309 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 183 transitions. Word has length 105 [2020-09-24 19:17:59,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:17:59,309 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 183 transitions. [2020-09-24 19:17:59,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 19:17:59,310 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 183 transitions. [2020-09-24 19:17:59,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-09-24 19:17:59,312 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:17:59,312 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:17:59,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 19:17:59,312 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:17:59,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:17:59,313 INFO L82 PathProgramCache]: Analyzing trace with hash -161175400, now seen corresponding path program 1 times [2020-09-24 19:17:59,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:17:59,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835926595] [2020-09-24 19:17:59,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:17:59,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:17:59,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:59,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:59,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:59,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:00,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:00,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:00,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-09-24 19:18:00,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 19:18:00,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1003 [2020-09-24 19:18:00,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:00,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:18:00,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-09-24 19:18:00,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-24 19:18:00,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:00,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:18:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:00,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:00,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:00,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:18:00,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:00,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:00,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:00,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:00,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:00,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:00,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:00,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 19:18:00,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:00,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:00,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:00,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:00,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:00,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:18:00,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:00,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:00,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:00,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:00,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:00,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 19:18:00,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:00,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:00,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:00,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:00,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-24 19:18:00,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:18:00,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-24 19:18:00,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:00,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:00,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:00,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:00,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:00,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-24 19:18:00,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:00,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:00,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:00,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:00,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:00,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:18:00,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:00,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:00,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:00,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:00,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:00,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-09-24 19:18:00,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:00,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:00,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:00,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:00,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:00,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:18:00,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:00,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:00,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:00,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:00,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:00,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-24 19:18:00,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:00,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:00,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:00,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 19:18:00,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:00,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 19:18:00,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:00,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:18:00,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:00,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 19:18:00,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:00,477 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-09-24 19:18:00,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835926595] [2020-09-24 19:18:00,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:18:00,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 19:18:00,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311899098] [2020-09-24 19:18:00,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 19:18:00,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:18:00,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 19:18:00,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:18:00,480 INFO L87 Difference]: Start difference. First operand 156 states and 183 transitions. Second operand 4 states. [2020-09-24 19:18:00,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:18:00,513 INFO L93 Difference]: Finished difference Result 172 states and 201 transitions. [2020-09-24 19:18:00,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 19:18:00,513 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 110 [2020-09-24 19:18:00,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:18:00,516 INFO L225 Difference]: With dead ends: 172 [2020-09-24 19:18:00,516 INFO L226 Difference]: Without dead ends: 155 [2020-09-24 19:18:00,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:18:00,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-24 19:18:00,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2020-09-24 19:18:00,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-09-24 19:18:00,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 181 transitions. [2020-09-24 19:18:00,530 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 181 transitions. Word has length 110 [2020-09-24 19:18:00,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:18:00,530 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 181 transitions. [2020-09-24 19:18:00,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 19:18:00,531 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 181 transitions. [2020-09-24 19:18:00,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-09-24 19:18:00,532 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:18:00,532 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:18:00,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 19:18:00,533 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:18:00,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:18:00,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1153920056, now seen corresponding path program 1 times [2020-09-24 19:18:00,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:18:00,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211490582] [2020-09-24 19:18:00,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:18:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:00,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:00,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:00,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:01,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:01,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-09-24 19:18:01,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:18:01,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 999 [2020-09-24 19:18:01,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:01,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:18:01,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 19:18:01,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 19:18:01,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:01,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:18:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:01,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:01,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:01,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:18:01,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:01,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:01,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:01,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:01,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:01,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:01,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:01,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 19:18:01,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:01,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:01,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:01,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:01,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:01,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:18:01,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:01,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:01,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:01,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:01,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:01,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 19:18:01,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:01,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:01,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:01,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-24 19:18:01,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:01,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-24 19:18:01,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:01,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:18:01,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 19:18:01,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 19:18:01,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:01,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-24 19:18:01,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:01,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:01,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:01,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:01,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:01,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:18:01,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:01,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:01,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 19:18:01,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:01,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:01,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-09-24 19:18:01,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:01,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:01,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:01,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:01,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:01,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:18:01,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:01,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:01,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 19:18:01,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:01,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:01,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-24 19:18:01,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:01,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:01,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:01,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 19:18:01,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:01,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 19:18:01,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:01,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:01,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 19:18:01,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:01,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 19:18:01,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211490582] [2020-09-24 19:18:01,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:18:01,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 19:18:01,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349907330] [2020-09-24 19:18:01,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:18:01,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:18:01,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:18:01,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:18:01,703 INFO L87 Difference]: Start difference. First operand 155 states and 181 transitions. Second operand 5 states. [2020-09-24 19:18:01,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:18:01,805 INFO L93 Difference]: Finished difference Result 310 states and 367 transitions. [2020-09-24 19:18:01,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 19:18:01,806 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 110 [2020-09-24 19:18:01,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:18:01,809 INFO L225 Difference]: With dead ends: 310 [2020-09-24 19:18:01,809 INFO L226 Difference]: Without dead ends: 190 [2020-09-24 19:18:01,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:18:01,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-24 19:18:01,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 171. [2020-09-24 19:18:01,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-24 19:18:01,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 200 transitions. [2020-09-24 19:18:01,824 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 200 transitions. Word has length 110 [2020-09-24 19:18:01,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:18:01,825 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 200 transitions. [2020-09-24 19:18:01,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:18:01,825 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 200 transitions. [2020-09-24 19:18:01,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-09-24 19:18:01,826 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:18:01,827 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:18:01,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 19:18:01,827 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:18:01,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:18:01,828 INFO L82 PathProgramCache]: Analyzing trace with hash -856467222, now seen corresponding path program 1 times [2020-09-24 19:18:01,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:18:01,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376198049] [2020-09-24 19:18:01,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:18:01,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:01,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:01,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:01,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:02,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:02,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-09-24 19:18:02,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:18:02,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 999 [2020-09-24 19:18:02,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:02,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:18:02,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 19:18:02,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 19:18:02,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:02,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:18:02,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:02,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:02,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:02,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:18:02,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:02,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:02,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:02,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:02,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:02,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:02,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:02,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 19:18:02,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:02,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:02,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:02,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:02,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:02,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:18:02,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:02,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:02,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:02,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:02,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:02,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 19:18:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:02,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:02,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:02,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-24 19:18:02,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:02,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-24 19:18:02,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:02,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:18:02,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 19:18:02,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 19:18:02,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:02,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-24 19:18:02,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:02,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:02,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:02,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:02,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:02,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:18:02,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:02,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:02,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 19:18:02,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:02,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:02,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-09-24 19:18:02,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:02,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:02,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:02,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:02,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:02,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:18:02,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:02,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:02,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 19:18:02,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:02,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:02,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-24 19:18:02,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:02,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:03,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:03,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 19:18:03,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:03,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 19:18:03,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:03,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:03,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 19:18:03,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:03,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:03,020 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 19:18:03,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376198049] [2020-09-24 19:18:03,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:18:03,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 19:18:03,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865371037] [2020-09-24 19:18:03,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:18:03,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:18:03,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:18:03,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:18:03,023 INFO L87 Difference]: Start difference. First operand 171 states and 200 transitions. Second operand 5 states. [2020-09-24 19:18:03,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:18:03,178 INFO L93 Difference]: Finished difference Result 318 states and 378 transitions. [2020-09-24 19:18:03,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 19:18:03,179 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 110 [2020-09-24 19:18:03,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:18:03,180 INFO L225 Difference]: With dead ends: 318 [2020-09-24 19:18:03,181 INFO L226 Difference]: Without dead ends: 197 [2020-09-24 19:18:03,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:18:03,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-09-24 19:18:03,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 167. [2020-09-24 19:18:03,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-24 19:18:03,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 194 transitions. [2020-09-24 19:18:03,195 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 194 transitions. Word has length 110 [2020-09-24 19:18:03,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:18:03,195 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 194 transitions. [2020-09-24 19:18:03,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:18:03,196 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 194 transitions. [2020-09-24 19:18:03,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-09-24 19:18:03,198 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:18:03,198 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:18:03,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 19:18:03,199 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:18:03,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:18:03,199 INFO L82 PathProgramCache]: Analyzing trace with hash -812048320, now seen corresponding path program 2 times [2020-09-24 19:18:03,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:18:03,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398009429] [2020-09-24 19:18:03,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:18:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:03,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:03,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:03,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:04,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:04,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-09-24 19:18:04,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:18:04,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 999 [2020-09-24 19:18:04,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:04,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:18:04,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 19:18:04,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 19:18:04,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:04,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:18:04,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:04,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:04,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:04,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:18:04,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:04,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:18:04,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:04,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:04,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:04,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:04,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:04,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 19:18:04,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:04,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:04,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:04,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:04,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:04,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:18:04,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:04,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:04,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:04,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:04,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:04,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 19:18:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:04,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:04,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:04,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-24 19:18:04,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:04,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-09-24 19:18:04,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:04,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:18:04,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 19:18:04,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 19:18:04,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:04,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 19:18:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:04,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:04,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:04,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:04,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:04,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:18:04,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:04,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:04,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 19:18:04,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:04,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:04,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-24 19:18:04,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:04,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:04,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:04,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:04,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:04,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:18:04,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:04,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:04,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 19:18:04,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:04,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:04,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-09-24 19:18:04,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:04,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:04,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:04,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 19:18:04,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:04,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 19:18:04,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:04,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:04,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 19:18:04,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:04,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:04,417 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 19:18:04,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398009429] [2020-09-24 19:18:04,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:18:04,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 19:18:04,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069026736] [2020-09-24 19:18:04,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 19:18:04,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:18:04,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 19:18:04,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:18:04,421 INFO L87 Difference]: Start difference. First operand 167 states and 194 transitions. Second operand 6 states. [2020-09-24 19:18:04,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:18:04,551 INFO L93 Difference]: Finished difference Result 334 states and 395 transitions. [2020-09-24 19:18:04,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 19:18:04,551 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2020-09-24 19:18:04,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:18:04,554 INFO L225 Difference]: With dead ends: 334 [2020-09-24 19:18:04,555 INFO L226 Difference]: Without dead ends: 213 [2020-09-24 19:18:04,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:18:04,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-09-24 19:18:04,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 177. [2020-09-24 19:18:04,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-24 19:18:04,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 207 transitions. [2020-09-24 19:18:04,574 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 207 transitions. Word has length 115 [2020-09-24 19:18:04,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:18:04,575 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 207 transitions. [2020-09-24 19:18:04,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 19:18:04,575 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 207 transitions. [2020-09-24 19:18:04,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-09-24 19:18:04,577 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:18:04,577 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:18:04,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 19:18:04,578 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:18:04,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:18:04,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1472531698, now seen corresponding path program 1 times [2020-09-24 19:18:04,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:18:04,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348391675] [2020-09-24 19:18:04,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:18:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:04,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:04,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:04,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:05,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:05,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-09-24 19:18:05,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:18:05,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1011 [2020-09-24 19:18:05,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:05,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:18:05,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-09-24 19:18:05,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-09-24 19:18:05,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:05,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:18:05,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:05,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:05,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:05,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:18:05,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:05,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:05,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:05,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:05,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:05,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:05,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:05,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 19:18:05,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:05,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:05,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:05,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:05,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:05,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 19:18:05,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:05,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:18:05,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:05,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 19:18:05,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:05,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 19:18:05,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:05,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:05,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:05,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:05,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-24 19:18:05,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:18:05,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-09-24 19:18:05,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:05,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:18:05,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:05,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-24 19:18:05,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:05,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 19:18:05,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:05,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:05,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:05,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:05,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:05,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 19:18:05,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:05,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:18:05,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:05,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 19:18:05,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:05,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-24 19:18:05,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:05,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:05,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:05,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:05,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:05,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 19:18:05,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:05,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:18:05,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:05,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 19:18:05,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:05,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-09-24 19:18:05,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:05,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:05,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:05,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 19:18:05,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:05,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 19:18:05,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:05,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:18:05,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:05,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 19:18:05,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:05,927 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-09-24 19:18:05,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348391675] [2020-09-24 19:18:05,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:18:05,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 19:18:05,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025861549] [2020-09-24 19:18:05,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 19:18:05,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:18:05,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 19:18:05,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:18:05,931 INFO L87 Difference]: Start difference. First operand 177 states and 207 transitions. Second operand 6 states. [2020-09-24 19:18:06,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:18:06,037 INFO L93 Difference]: Finished difference Result 217 states and 264 transitions. [2020-09-24 19:18:06,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 19:18:06,038 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2020-09-24 19:18:06,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:18:06,040 INFO L225 Difference]: With dead ends: 217 [2020-09-24 19:18:06,041 INFO L226 Difference]: Without dead ends: 211 [2020-09-24 19:18:06,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:18:06,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-09-24 19:18:06,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 200. [2020-09-24 19:18:06,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-09-24 19:18:06,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 238 transitions. [2020-09-24 19:18:06,057 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 238 transitions. Word has length 115 [2020-09-24 19:18:06,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:18:06,058 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 238 transitions. [2020-09-24 19:18:06,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 19:18:06,059 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 238 transitions. [2020-09-24 19:18:06,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-09-24 19:18:06,062 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:18:06,062 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:18:06,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 19:18:06,063 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:18:06,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:18:06,064 INFO L82 PathProgramCache]: Analyzing trace with hash 237385401, now seen corresponding path program 1 times [2020-09-24 19:18:06,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:18:06,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060998268] [2020-09-24 19:18:06,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:18:06,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:06,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:06,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:06,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:06,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-09-24 19:18:06,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:18:06,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 712 [2020-09-24 19:18:06,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:06,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:18:06,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 19:18:06,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 19:18:06,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:06,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:18:06,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:06,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:06,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:06,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:18:06,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:06,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:06,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:06,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:06,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:06,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:06,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:06,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 19:18:06,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:06,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:06,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:06,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:06,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:06,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:18:06,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:06,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:06,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:06,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:06,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:06,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 19:18:06,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:06,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:06,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:06,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-24 19:18:06,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:06,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-09-24 19:18:06,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:06,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:18:06,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 19:18:06,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-24 19:18:06,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:06,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 19:18:06,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:06,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:06,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:06,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:06,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:06,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 19:18:06,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:06,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:06,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 19:18:06,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:06,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:06,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-24 19:18:06,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:06,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:06,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:06,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:06,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:06,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:18:06,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:06,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:06,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 19:18:06,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:06,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:06,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-09-24 19:18:06,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:06,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:06,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:07,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 19:18:07,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:07,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 19:18:07,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:07,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:07,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 19:18:07,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:07,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:07,041 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 19:18:07,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060998268] [2020-09-24 19:18:07,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:18:07,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 19:18:07,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173971290] [2020-09-24 19:18:07,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 19:18:07,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:18:07,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 19:18:07,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:18:07,044 INFO L87 Difference]: Start difference. First operand 200 states and 238 transitions. Second operand 6 states. [2020-09-24 19:18:07,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:18:07,167 INFO L93 Difference]: Finished difference Result 365 states and 451 transitions. [2020-09-24 19:18:07,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 19:18:07,168 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2020-09-24 19:18:07,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:18:07,170 INFO L225 Difference]: With dead ends: 365 [2020-09-24 19:18:07,170 INFO L226 Difference]: Without dead ends: 229 [2020-09-24 19:18:07,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:18:07,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-09-24 19:18:07,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 200. [2020-09-24 19:18:07,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-09-24 19:18:07,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 238 transitions. [2020-09-24 19:18:07,185 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 238 transitions. Word has length 117 [2020-09-24 19:18:07,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:18:07,186 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 238 transitions. [2020-09-24 19:18:07,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 19:18:07,186 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 238 transitions. [2020-09-24 19:18:07,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-09-24 19:18:07,188 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:18:07,189 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:18:07,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 19:18:07,189 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:18:07,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:18:07,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1273487743, now seen corresponding path program 1 times [2020-09-24 19:18:07,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:18:07,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956512512] [2020-09-24 19:18:07,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:18:07,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:07,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:07,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:08,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:08,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-09-24 19:18:08,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:18:08,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 799 [2020-09-24 19:18:08,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:08,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:18:08,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 124 [2020-09-24 19:18:08,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 19:18:08,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:08,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:18:08,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:08,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:08,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:08,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:18:08,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:08,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:18:08,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:08,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:08,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:08,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:08,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:08,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 19:18:08,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:08,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:08,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:08,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:08,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:08,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:18:08,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:08,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:08,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:08,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:08,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:08,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 19:18:08,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:08,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:08,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:08,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:08,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 19:18:08,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:18:08,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-09-24 19:18:08,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:08,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:08,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:08,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:08,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:08,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-24 19:18:08,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:08,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:08,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:08,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:08,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:08,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:18:08,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:08,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:08,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:08,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:08,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:08,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-09-24 19:18:08,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:08,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:08,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:08,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:08,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:08,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:18:08,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:08,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:08,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:08,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:08,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:08,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-09-24 19:18:08,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:08,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:08,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:08,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 19:18:08,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:08,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 19:18:08,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:08,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:18:08,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:08,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 19:18:08,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:08,252 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-09-24 19:18:08,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956512512] [2020-09-24 19:18:08,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:18:08,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 19:18:08,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637279365] [2020-09-24 19:18:08,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 19:18:08,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:18:08,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 19:18:08,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:18:08,255 INFO L87 Difference]: Start difference. First operand 200 states and 238 transitions. Second operand 6 states. [2020-09-24 19:18:08,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:18:08,343 INFO L93 Difference]: Finished difference Result 223 states and 263 transitions. [2020-09-24 19:18:08,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 19:18:08,344 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2020-09-24 19:18:08,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:18:08,346 INFO L225 Difference]: With dead ends: 223 [2020-09-24 19:18:08,346 INFO L226 Difference]: Without dead ends: 216 [2020-09-24 19:18:08,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:18:08,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-24 19:18:08,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 212. [2020-09-24 19:18:08,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-09-24 19:18:08,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 252 transitions. [2020-09-24 19:18:08,361 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 252 transitions. Word has length 122 [2020-09-24 19:18:08,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:18:08,362 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 252 transitions. [2020-09-24 19:18:08,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 19:18:08,362 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 252 transitions. [2020-09-24 19:18:08,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-09-24 19:18:08,364 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:18:08,365 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:18:08,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 19:18:08,365 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:18:08,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:18:08,365 INFO L82 PathProgramCache]: Analyzing trace with hash -273081057, now seen corresponding path program 1 times [2020-09-24 19:18:08,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:18:08,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216320767] [2020-09-24 19:18:08,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:18:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:08,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:08,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:09,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:09,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-09-24 19:18:09,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:18:09,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 834 [2020-09-24 19:18:09,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:09,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:18:09,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 133 [2020-09-24 19:18:09,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 19:18:09,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:09,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:18:09,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:09,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:09,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:09,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:18:09,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:09,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:09,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:09,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:09,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:09,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:09,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:09,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 19:18:09,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:09,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:09,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:09,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:09,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:09,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:09,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:09,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:09,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:09,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:09,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:09,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 19:18:09,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:09,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:09,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:09,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:09,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 19:18:09,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:18:09,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-09-24 19:18:09,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:09,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:09,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:09,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:09,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:09,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-24 19:18:09,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:09,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:09,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:09,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:09,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:09,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:09,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:09,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:09,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:09,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:09,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:09,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-09-24 19:18:09,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:09,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:09,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:09,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:09,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:09,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:18:09,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:09,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:09,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:09,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:09,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:09,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-09-24 19:18:09,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:09,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:09,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:09,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 19:18:09,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:09,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:18:09,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:09,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:09,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:09,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:09,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:09,445 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-09-24 19:18:09,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216320767] [2020-09-24 19:18:09,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:18:09,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 19:18:09,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235663443] [2020-09-24 19:18:09,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 19:18:09,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:18:09,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 19:18:09,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:18:09,449 INFO L87 Difference]: Start difference. First operand 212 states and 252 transitions. Second operand 6 states. [2020-09-24 19:18:09,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:18:09,505 INFO L93 Difference]: Finished difference Result 218 states and 257 transitions. [2020-09-24 19:18:09,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 19:18:09,506 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2020-09-24 19:18:09,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:18:09,508 INFO L225 Difference]: With dead ends: 218 [2020-09-24 19:18:09,508 INFO L226 Difference]: Without dead ends: 206 [2020-09-24 19:18:09,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:18:09,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-24 19:18:09,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2020-09-24 19:18:09,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-09-24 19:18:09,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 243 transitions. [2020-09-24 19:18:09,531 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 243 transitions. Word has length 122 [2020-09-24 19:18:09,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:18:09,532 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 243 transitions. [2020-09-24 19:18:09,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 19:18:09,532 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 243 transitions. [2020-09-24 19:18:09,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-09-24 19:18:09,534 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:18:09,534 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:18:09,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 19:18:09,535 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:18:09,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:18:09,535 INFO L82 PathProgramCache]: Analyzing trace with hash 2087844245, now seen corresponding path program 1 times [2020-09-24 19:18:09,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:18:09,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350252643] [2020-09-24 19:18:09,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:18:09,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:09,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:09,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:10,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:10,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:10,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-09-24 19:18:10,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:18:10,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 999 [2020-09-24 19:18:10,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:10,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:18:10,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 19:18:10,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 19:18:10,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:10,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:18:10,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:10,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:10,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:10,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:18:10,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:10,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:10,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:10,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:10,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:10,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:10,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:10,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 19:18:10,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:10,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:10,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:10,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:10,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:10,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:10,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:10,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:10,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:10,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:10,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:10,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 19:18:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:10,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:10,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:10,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 19:18:10,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:10,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-09-24 19:18:10,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:10,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:18:10,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 19:18:10,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-24 19:18:10,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:10,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-24 19:18:10,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:10,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:10,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:10,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:10,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:10,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:18:10,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:10,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:10,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 19:18:10,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:10,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:10,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-09-24 19:18:10,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:10,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:10,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:10,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:10,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:10,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:18:10,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:10,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:10,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 19:18:10,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:10,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:10,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-09-24 19:18:10,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:10,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:10,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:10,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-24 19:18:10,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:10,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-24 19:18:10,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:10,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:10,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 19:18:10,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:10,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:10,808 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 19:18:10,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350252643] [2020-09-24 19:18:10,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:18:10,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 19:18:10,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859190152] [2020-09-24 19:18:10,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 19:18:10,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:18:10,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 19:18:10,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:18:10,810 INFO L87 Difference]: Start difference. First operand 206 states and 243 transitions. Second operand 7 states. [2020-09-24 19:18:10,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:18:10,917 INFO L93 Difference]: Finished difference Result 413 states and 507 transitions. [2020-09-24 19:18:10,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 19:18:10,918 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 131 [2020-09-24 19:18:10,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:18:10,921 INFO L225 Difference]: With dead ends: 413 [2020-09-24 19:18:10,921 INFO L226 Difference]: Without dead ends: 264 [2020-09-24 19:18:10,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:18:10,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-09-24 19:18:10,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 216. [2020-09-24 19:18:10,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-09-24 19:18:10,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 256 transitions. [2020-09-24 19:18:10,939 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 256 transitions. Word has length 131 [2020-09-24 19:18:10,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:18:10,940 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 256 transitions. [2020-09-24 19:18:10,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 19:18:10,940 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 256 transitions. [2020-09-24 19:18:10,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-09-24 19:18:10,943 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:18:10,943 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:18:10,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 19:18:10,944 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:18:10,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:18:10,944 INFO L82 PathProgramCache]: Analyzing trace with hash -648050269, now seen corresponding path program 1 times [2020-09-24 19:18:10,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:18:10,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87908554] [2020-09-24 19:18:10,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:18:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:10,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:11,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:11,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:11,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:11,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-09-24 19:18:11,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:18:11,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1015 [2020-09-24 19:18:11,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:11,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:18:11,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 19:18:11,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 19:18:11,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:11,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:18:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:12,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:12,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:12,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:18:12,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:12,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:12,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:12,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:12,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:12,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:12,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:12,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 19:18:12,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:12,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:12,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:12,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:12,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:12,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:12,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:12,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:12,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:12,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:12,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:12,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 19:18:12,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:12,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:12,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:12,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 19:18:12,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:12,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-09-24 19:18:12,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:12,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:18:12,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 19:18:12,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-24 19:18:12,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:12,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-24 19:18:12,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:12,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:12,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:12,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:12,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:12,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:18:12,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:12,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:12,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 19:18:12,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:12,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:12,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-09-24 19:18:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:12,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:12,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:12,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:12,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:12,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:18:12,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:12,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:12,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 19:18:12,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:12,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:12,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-09-24 19:18:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:12,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:12,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:12,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-24 19:18:12,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:12,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-24 19:18:12,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:12,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:12,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 19:18:12,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:12,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 19:18:12,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87908554] [2020-09-24 19:18:12,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:18:12,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 19:18:12,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406487973] [2020-09-24 19:18:12,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 19:18:12,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:18:12,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 19:18:12,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:18:12,354 INFO L87 Difference]: Start difference. First operand 216 states and 256 transitions. Second operand 7 states. [2020-09-24 19:18:12,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:18:12,512 INFO L93 Difference]: Finished difference Result 396 states and 488 transitions. [2020-09-24 19:18:12,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 19:18:12,514 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 131 [2020-09-24 19:18:12,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:18:12,516 INFO L225 Difference]: With dead ends: 396 [2020-09-24 19:18:12,517 INFO L226 Difference]: Without dead ends: 249 [2020-09-24 19:18:12,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:18:12,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-09-24 19:18:12,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 216. [2020-09-24 19:18:12,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-09-24 19:18:12,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 256 transitions. [2020-09-24 19:18:12,544 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 256 transitions. Word has length 131 [2020-09-24 19:18:12,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:18:12,544 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 256 transitions. [2020-09-24 19:18:12,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 19:18:12,545 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 256 transitions. [2020-09-24 19:18:12,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-24 19:18:12,547 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:18:12,547 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:18:12,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 19:18:12,547 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:18:12,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:18:12,548 INFO L82 PathProgramCache]: Analyzing trace with hash -911828339, now seen corresponding path program 2 times [2020-09-24 19:18:12,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:18:12,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549709112] [2020-09-24 19:18:12,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:18:12,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:12,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:12,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:12,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:13,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:13,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:13,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:13,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-09-24 19:18:13,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 19:18:13,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1005 [2020-09-24 19:18:13,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:13,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 19:18:13,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 19:18:13,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 19:18:13,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:13,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:18:13,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:13,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:13,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:13,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:18:13,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:13,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:13,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:13,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:13,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:13,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:13,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:13,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 19:18:13,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:13,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:13,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:13,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:13,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:13,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:13,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:13,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:13,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:13,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:13,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:13,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 19:18:13,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:13,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:13,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:13,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-24 19:18:13,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:13,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-09-24 19:18:13,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:13,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 19:18:13,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 19:18:13,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-24 19:18:13,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:13,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-09-24 19:18:13,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:13,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:13,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:13,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:13,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:13,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:18:13,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:13,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:13,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 19:18:13,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:13,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:13,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-24 19:18:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:13,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:13,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:13,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:13,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:13,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:18:13,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:13,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:13,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 19:18:13,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:13,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:13,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-09-24 19:18:13,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:13,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:13,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:13,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-24 19:18:13,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:13,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-24 19:18:13,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:13,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:13,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 19:18:13,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:13,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:13,875 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 19:18:13,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549709112] [2020-09-24 19:18:13,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:18:13,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 19:18:13,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466773322] [2020-09-24 19:18:13,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 19:18:13,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:18:13,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 19:18:13,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:18:13,878 INFO L87 Difference]: Start difference. First operand 216 states and 256 transitions. Second operand 8 states. [2020-09-24 19:18:14,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:18:14,107 INFO L93 Difference]: Finished difference Result 443 states and 549 transitions. [2020-09-24 19:18:14,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 19:18:14,108 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 136 [2020-09-24 19:18:14,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:18:14,111 INFO L225 Difference]: With dead ends: 443 [2020-09-24 19:18:14,111 INFO L226 Difference]: Without dead ends: 289 [2020-09-24 19:18:14,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-09-24 19:18:14,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-09-24 19:18:14,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 226. [2020-09-24 19:18:14,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-09-24 19:18:14,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 269 transitions. [2020-09-24 19:18:14,134 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 269 transitions. Word has length 136 [2020-09-24 19:18:14,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:18:14,134 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 269 transitions. [2020-09-24 19:18:14,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 19:18:14,134 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 269 transitions. [2020-09-24 19:18:14,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-24 19:18:14,137 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:18:14,137 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:18:14,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 19:18:14,137 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:18:14,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:18:14,138 INFO L82 PathProgramCache]: Analyzing trace with hash 647244443, now seen corresponding path program 2 times [2020-09-24 19:18:14,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:18:14,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510956205] [2020-09-24 19:18:14,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:18:14,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:14,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:14,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:14,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:15,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:15,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:15,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:15,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-09-24 19:18:15,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 19:18:15,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1054 [2020-09-24 19:18:15,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:15,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 19:18:15,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 19:18:15,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-24 19:18:15,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:15,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:18:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:15,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:15,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:15,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:18:15,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:15,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:15,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:15,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:15,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:15,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:15,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:15,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 19:18:15,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:15,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:15,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:15,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:15,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:15,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:18:15,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:15,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:15,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:15,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:15,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:15,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 19:18:15,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:15,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:15,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:15,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-24 19:18:15,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:15,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-09-24 19:18:15,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:15,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 19:18:15,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 19:18:15,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-24 19:18:15,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:15,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-09-24 19:18:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:15,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:15,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:15,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:15,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:15,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:18:15,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:15,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:15,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 19:18:15,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:15,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:15,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-24 19:18:15,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:15,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:15,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:15,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:15,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:15,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:18:15,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:15,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:15,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 19:18:15,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:15,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:15,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-09-24 19:18:15,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:15,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:15,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:15,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-24 19:18:15,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:15,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-24 19:18:15,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:15,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:15,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 19:18:15,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:15,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 19:18:15,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510956205] [2020-09-24 19:18:15,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:18:15,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 19:18:15,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54877790] [2020-09-24 19:18:15,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 19:18:15,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:18:15,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 19:18:15,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:18:15,570 INFO L87 Difference]: Start difference. First operand 226 states and 269 transitions. Second operand 8 states. [2020-09-24 19:18:15,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:18:15,987 INFO L93 Difference]: Finished difference Result 434 states and 538 transitions. [2020-09-24 19:18:15,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 19:18:15,991 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 136 [2020-09-24 19:18:15,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:18:15,994 INFO L225 Difference]: With dead ends: 434 [2020-09-24 19:18:15,994 INFO L226 Difference]: Without dead ends: 271 [2020-09-24 19:18:15,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-24 19:18:15,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-09-24 19:18:16,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 226. [2020-09-24 19:18:16,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-09-24 19:18:16,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 266 transitions. [2020-09-24 19:18:16,018 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 266 transitions. Word has length 136 [2020-09-24 19:18:16,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:18:16,018 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 266 transitions. [2020-09-24 19:18:16,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 19:18:16,019 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 266 transitions. [2020-09-24 19:18:16,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-09-24 19:18:16,021 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:18:16,021 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:18:16,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 19:18:16,022 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:18:16,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:18:16,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1267192981, now seen corresponding path program 3 times [2020-09-24 19:18:16,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:18:16,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758611458] [2020-09-24 19:18:16,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:18:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:16,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:16,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:16,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:16,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:17,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:17,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-09-24 19:18:17,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:18:17,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1006 [2020-09-24 19:18:17,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:17,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 19:18:17,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 109 [2020-09-24 19:18:17,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 19:18:17,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:17,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:18:17,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:17,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:17,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:17,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:18:17,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:17,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:17,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:17,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:17,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:17,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:17,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:17,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 19:18:17,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:17,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:17,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:17,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:17,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:17,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:17,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:17,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:17,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:17,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:17,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:17,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 19:18:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:17,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:17,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:17,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:17,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-24 19:18:17,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:18:17,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-09-24 19:18:17,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:17,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:17,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:17,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:17,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:17,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-09-24 19:18:17,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:17,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:17,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:17,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:17,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:17,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:17,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:17,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:17,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:17,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:17,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:17,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-24 19:18:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:17,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:17,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:17,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:17,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:17,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 19:18:17,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:17,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:18:17,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:17,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 19:18:17,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:17,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-09-24 19:18:17,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:17,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:17,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:17,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-24 19:18:17,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:17,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-09-24 19:18:17,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:17,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:18:17,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 19:18:17,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 19:18:17,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:17,455 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-09-24 19:18:17,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758611458] [2020-09-24 19:18:17,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:18:17,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 19:18:17,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647917446] [2020-09-24 19:18:17,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 19:18:17,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:18:17,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 19:18:17,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:18:17,460 INFO L87 Difference]: Start difference. First operand 226 states and 266 transitions. Second operand 8 states. [2020-09-24 19:18:17,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:18:17,589 INFO L93 Difference]: Finished difference Result 310 states and 372 transitions. [2020-09-24 19:18:17,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 19:18:17,590 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 141 [2020-09-24 19:18:17,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:18:17,593 INFO L225 Difference]: With dead ends: 310 [2020-09-24 19:18:17,593 INFO L226 Difference]: Without dead ends: 282 [2020-09-24 19:18:17,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-24 19:18:17,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-09-24 19:18:17,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 244. [2020-09-24 19:18:17,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-09-24 19:18:17,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 291 transitions. [2020-09-24 19:18:17,612 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 291 transitions. Word has length 141 [2020-09-24 19:18:17,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:18:17,612 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 291 transitions. [2020-09-24 19:18:17,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 19:18:17,612 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 291 transitions. [2020-09-24 19:18:17,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-09-24 19:18:17,615 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:18:17,615 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:18:17,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 19:18:17,615 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:18:17,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:18:17,616 INFO L82 PathProgramCache]: Analyzing trace with hash -801703783, now seen corresponding path program 1 times [2020-09-24 19:18:17,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:18:17,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147399559] [2020-09-24 19:18:17,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:18:17,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:17,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:17,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:17,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:18,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:18,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-09-24 19:18:18,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:18:18,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-24 19:18:18,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:18,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 19:18:18,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 19:18:18,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-24 19:18:18,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:18,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:18:18,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:18,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:18,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:18,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:18:18,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:18,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:18,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:18,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:18,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:18,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:18,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:18,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 19:18:18,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:18,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:18,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:18,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:18,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:18,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:18,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:18,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:18,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:18,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:18,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:18,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 19:18:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:18,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:18,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:18,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-24 19:18:18,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:18,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-09-24 19:18:18,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:18,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 19:18:18,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 19:18:18,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 19:18:18,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:18,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-09-24 19:18:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:18,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:18,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:18,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:18,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:18,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:18:18,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:18,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:18,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 19:18:18,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:18,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:18,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-24 19:18:18,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:18,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:18,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:18,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 19:18:18,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:18,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 19:18:18,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:18,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:18,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 19:18:18,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:18,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:18,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-09-24 19:18:18,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:18,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:18,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:18,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-24 19:18:18,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:18,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-24 19:18:18,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:18,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:18,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 19:18:18,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:18,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:18,982 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 6 proven. 73 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-09-24 19:18:18,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147399559] [2020-09-24 19:18:18,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:18:18,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 19:18:18,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513220317] [2020-09-24 19:18:18,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 19:18:18,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:18:18,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 19:18:18,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-24 19:18:18,986 INFO L87 Difference]: Start difference. First operand 244 states and 291 transitions. Second operand 9 states. [2020-09-24 19:18:19,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:18:19,206 INFO L93 Difference]: Finished difference Result 489 states and 608 transitions. [2020-09-24 19:18:19,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 19:18:19,206 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 145 [2020-09-24 19:18:19,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:18:19,209 INFO L225 Difference]: With dead ends: 489 [2020-09-24 19:18:19,209 INFO L226 Difference]: Without dead ends: 312 [2020-09-24 19:18:19,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-09-24 19:18:19,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-09-24 19:18:19,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 254. [2020-09-24 19:18:19,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-09-24 19:18:19,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 304 transitions. [2020-09-24 19:18:19,232 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 304 transitions. Word has length 145 [2020-09-24 19:18:19,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:18:19,233 INFO L479 AbstractCegarLoop]: Abstraction has 254 states and 304 transitions. [2020-09-24 19:18:19,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 19:18:19,233 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 304 transitions. [2020-09-24 19:18:19,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-09-24 19:18:19,236 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:18:19,236 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:18:19,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 19:18:19,237 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:18:19,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:18:19,237 INFO L82 PathProgramCache]: Analyzing trace with hash -593374809, now seen corresponding path program 1 times [2020-09-24 19:18:19,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:18:19,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046883818] [2020-09-24 19:18:19,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:18:19,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:19,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:19,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:19,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:20,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:20,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-09-24 19:18:20,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:18:20,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1005 [2020-09-24 19:18:20,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:20,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 19:18:20,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 19:18:20,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-24 19:18:20,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:20,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:18:20,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:20,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:20,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:20,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:18:20,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:20,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:20,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:20,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:20,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:20,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:20,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:20,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 19:18:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:20,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:20,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:20,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:20,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:20,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:20,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:20,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:20,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:20,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:20,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:20,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 19:18:20,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:20,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:20,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:20,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-24 19:18:20,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:20,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-09-24 19:18:20,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:20,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 19:18:20,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 19:18:20,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-24 19:18:20,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:20,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-09-24 19:18:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:20,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:20,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:20,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:20,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:20,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:18:20,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:20,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:20,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 19:18:20,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:20,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:20,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-24 19:18:20,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:20,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:20,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:20,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 19:18:20,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:20,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 19:18:20,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:20,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:20,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 19:18:20,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:20,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:20,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-09-24 19:18:20,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:20,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:20,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:20,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-24 19:18:20,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:20,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-24 19:18:20,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:20,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:20,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 19:18:20,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:20,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:20,662 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 65 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-09-24 19:18:20,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046883818] [2020-09-24 19:18:20,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:18:20,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 19:18:20,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507898763] [2020-09-24 19:18:20,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 19:18:20,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:18:20,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 19:18:20,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-24 19:18:20,672 INFO L87 Difference]: Start difference. First operand 254 states and 304 transitions. Second operand 9 states. [2020-09-24 19:18:21,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:18:21,133 INFO L93 Difference]: Finished difference Result 485 states and 599 transitions. [2020-09-24 19:18:21,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 19:18:21,134 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 145 [2020-09-24 19:18:21,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:18:21,138 INFO L225 Difference]: With dead ends: 485 [2020-09-24 19:18:21,138 INFO L226 Difference]: Without dead ends: 301 [2020-09-24 19:18:21,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-24 19:18:21,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-09-24 19:18:21,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 254. [2020-09-24 19:18:21,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-09-24 19:18:21,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 303 transitions. [2020-09-24 19:18:21,161 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 303 transitions. Word has length 145 [2020-09-24 19:18:21,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:18:21,162 INFO L479 AbstractCegarLoop]: Abstraction has 254 states and 303 transitions. [2020-09-24 19:18:21,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 19:18:21,162 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 303 transitions. [2020-09-24 19:18:21,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-09-24 19:18:21,164 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:18:21,165 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:18:21,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 19:18:21,165 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:18:21,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:18:21,166 INFO L82 PathProgramCache]: Analyzing trace with hash 560105361, now seen corresponding path program 2 times [2020-09-24 19:18:21,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:18:21,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325589817] [2020-09-24 19:18:21,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:18:21,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:21,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:21,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:21,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:22,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:22,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-09-24 19:18:22,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:18:22,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1006 [2020-09-24 19:18:22,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:22,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 19:18:22,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 19:18:22,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 19:18:22,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:22,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:18:22,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:22,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:22,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:22,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:18:22,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:22,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:22,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:22,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:22,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:22,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:22,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:22,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 19:18:22,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:22,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:22,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:22,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:22,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:22,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:18:22,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:22,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:22,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:22,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:22,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:22,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 19:18:22,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:22,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:22,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:22,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-24 19:18:22,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:22,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-09-24 19:18:22,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:22,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 19:18:22,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 19:18:22,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-24 19:18:22,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:22,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-24 19:18:22,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:22,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:22,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:22,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:22,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:22,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:18:22,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:22,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:22,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 19:18:22,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:22,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:22,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-24 19:18:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:22,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:22,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:22,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 19:18:22,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:22,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 19:18:22,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:22,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:22,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 19:18:22,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:22,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:22,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-09-24 19:18:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:22,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:22,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:22,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-24 19:18:22,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:22,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-24 19:18:22,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:22,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:22,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 19:18:22,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:22,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:22,546 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 6 proven. 100 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-09-24 19:18:22,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325589817] [2020-09-24 19:18:22,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:18:22,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 19:18:22,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205588178] [2020-09-24 19:18:22,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 19:18:22,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:18:22,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 19:18:22,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-09-24 19:18:22,550 INFO L87 Difference]: Start difference. First operand 254 states and 303 transitions. Second operand 10 states. [2020-09-24 19:18:22,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:18:22,768 INFO L93 Difference]: Finished difference Result 514 states and 642 transitions. [2020-09-24 19:18:22,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 19:18:22,769 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 150 [2020-09-24 19:18:22,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:18:22,773 INFO L225 Difference]: With dead ends: 514 [2020-09-24 19:18:22,774 INFO L226 Difference]: Without dead ends: 332 [2020-09-24 19:18:22,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-09-24 19:18:22,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-09-24 19:18:22,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 264. [2020-09-24 19:18:22,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-09-24 19:18:22,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 316 transitions. [2020-09-24 19:18:22,802 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 316 transitions. Word has length 150 [2020-09-24 19:18:22,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:18:22,802 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 316 transitions. [2020-09-24 19:18:22,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 19:18:22,803 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 316 transitions. [2020-09-24 19:18:22,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-09-24 19:18:22,806 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:18:22,807 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:18:22,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-24 19:18:22,807 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:18:22,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:18:22,807 INFO L82 PathProgramCache]: Analyzing trace with hash 768434335, now seen corresponding path program 2 times [2020-09-24 19:18:22,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:18:22,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705122298] [2020-09-24 19:18:22,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:18:22,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:22,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:22,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:22,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:23,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:23,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-09-24 19:18:23,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:18:23,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1007 [2020-09-24 19:18:23,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:23,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 19:18:23,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 19:18:23,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 19:18:23,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:23,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:18:23,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:23,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:23,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:23,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:18:23,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:23,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:23,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:23,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:23,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:23,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:23,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:23,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 19:18:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:23,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:23,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:23,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:23,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:23,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:23,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:23,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:23,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:23,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:23,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:23,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 19:18:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:23,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:24,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:24,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-24 19:18:24,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:24,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-09-24 19:18:24,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:24,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 19:18:24,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 19:18:24,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-24 19:18:24,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:24,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-24 19:18:24,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:24,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:24,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:24,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:24,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:24,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:18:24,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:24,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:24,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 19:18:24,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:24,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:24,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-24 19:18:24,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:24,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:24,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:24,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 19:18:24,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:24,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 19:18:24,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:24,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:24,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 19:18:24,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:24,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:24,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-09-24 19:18:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:24,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:24,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:24,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-24 19:18:24,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:24,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-24 19:18:24,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:24,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:24,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 19:18:24,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:24,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:24,278 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 7 proven. 90 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-09-24 19:18:24,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705122298] [2020-09-24 19:18:24,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:18:24,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 19:18:24,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132909139] [2020-09-24 19:18:24,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 19:18:24,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:18:24,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 19:18:24,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-09-24 19:18:24,280 INFO L87 Difference]: Start difference. First operand 264 states and 316 transitions. Second operand 10 states. [2020-09-24 19:18:24,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:18:24,757 INFO L93 Difference]: Finished difference Result 505 states and 625 transitions. [2020-09-24 19:18:24,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 19:18:24,757 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 150 [2020-09-24 19:18:24,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:18:24,760 INFO L225 Difference]: With dead ends: 505 [2020-09-24 19:18:24,760 INFO L226 Difference]: Without dead ends: 316 [2020-09-24 19:18:24,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-24 19:18:24,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-09-24 19:18:24,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 264. [2020-09-24 19:18:24,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-09-24 19:18:24,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 315 transitions. [2020-09-24 19:18:24,783 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 315 transitions. Word has length 150 [2020-09-24 19:18:24,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:18:24,783 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 315 transitions. [2020-09-24 19:18:24,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 19:18:24,784 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 315 transitions. [2020-09-24 19:18:24,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-09-24 19:18:24,788 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:18:24,788 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:18:24,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-24 19:18:24,788 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:18:24,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:18:24,789 INFO L82 PathProgramCache]: Analyzing trace with hash -898526311, now seen corresponding path program 3 times [2020-09-24 19:18:24,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:18:24,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108412896] [2020-09-24 19:18:24,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:18:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:24,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:24,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:24,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:25,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:25,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-09-24 19:18:25,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:18:25,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-24 19:18:25,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:25,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 19:18:25,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 19:18:25,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-24 19:18:25,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:25,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:18:25,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:25,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:25,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:25,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:18:25,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:25,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:25,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:25,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:25,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:25,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:25,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:25,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 19:18:25,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:25,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:25,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:25,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:25,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:25,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:25,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:25,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:25,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:25,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:25,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:25,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 19:18:25,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:25,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:26,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:26,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-24 19:18:26,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:26,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-09-24 19:18:26,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:26,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 19:18:26,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 19:18:26,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-24 19:18:26,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:26,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-09-24 19:18:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:26,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:26,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:26,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:26,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:26,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:18:26,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:26,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:26,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 19:18:26,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:26,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:26,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-09-24 19:18:26,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:26,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:26,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:26,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 19:18:26,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:26,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-24 19:18:26,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:26,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:26,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 19:18:26,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:26,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:26,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-09-24 19:18:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:26,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:26,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:26,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-24 19:18:26,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:26,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-24 19:18:26,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:26,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:26,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 19:18:26,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:26,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:26,216 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 6 proven. 132 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-09-24 19:18:26,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108412896] [2020-09-24 19:18:26,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:18:26,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 19:18:26,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539821648] [2020-09-24 19:18:26,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 19:18:26,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:18:26,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 19:18:26,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-09-24 19:18:26,219 INFO L87 Difference]: Start difference. First operand 264 states and 315 transitions. Second operand 11 states. [2020-09-24 19:18:26,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:18:26,589 INFO L93 Difference]: Finished difference Result 539 states and 676 transitions. [2020-09-24 19:18:26,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 19:18:26,590 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 155 [2020-09-24 19:18:26,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:18:26,598 INFO L225 Difference]: With dead ends: 539 [2020-09-24 19:18:26,598 INFO L226 Difference]: Without dead ends: 352 [2020-09-24 19:18:26,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-09-24 19:18:26,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-09-24 19:18:26,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 274. [2020-09-24 19:18:26,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-09-24 19:18:26,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 328 transitions. [2020-09-24 19:18:26,627 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 328 transitions. Word has length 155 [2020-09-24 19:18:26,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:18:26,628 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 328 transitions. [2020-09-24 19:18:26,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 19:18:26,628 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 328 transitions. [2020-09-24 19:18:26,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-09-24 19:18:26,633 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:18:26,633 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:18:26,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-24 19:18:26,636 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:18:26,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:18:26,637 INFO L82 PathProgramCache]: Analyzing trace with hash -690197337, now seen corresponding path program 3 times [2020-09-24 19:18:26,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:18:26,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590627967] [2020-09-24 19:18:26,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:18:26,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:26,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:26,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:27,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:27,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:27,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-09-24 19:18:27,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:18:27,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1007 [2020-09-24 19:18:27,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:27,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 19:18:27,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 19:18:27,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-24 19:18:27,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:27,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:18:27,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:27,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:27,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:27,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:18:27,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:27,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:27,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:27,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:27,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:27,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:27,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:27,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 19:18:27,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:27,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:27,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:27,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:27,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:27,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:27,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:27,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:27,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:27,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:27,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:27,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 19:18:27,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:27,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:27,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:27,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-24 19:18:27,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:27,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-09-24 19:18:27,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:27,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 19:18:27,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 19:18:27,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-24 19:18:27,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:28,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-09-24 19:18:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:28,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:28,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:28,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:28,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:28,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:18:28,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:28,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:28,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 19:18:28,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:28,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:28,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-09-24 19:18:28,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:28,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:28,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:28,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 19:18:28,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:28,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 19:18:28,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:28,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:28,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 19:18:28,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:28,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:28,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-09-24 19:18:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:28,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:28,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:28,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-24 19:18:28,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:28,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-24 19:18:28,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:28,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:28,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 19:18:28,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:28,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:28,225 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 7 proven. 120 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-09-24 19:18:28,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590627967] [2020-09-24 19:18:28,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:18:28,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 19:18:28,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786128671] [2020-09-24 19:18:28,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 19:18:28,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:18:28,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 19:18:28,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-24 19:18:28,228 INFO L87 Difference]: Start difference. First operand 274 states and 328 transitions. Second operand 11 states. [2020-09-24 19:18:28,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:18:28,484 INFO L93 Difference]: Finished difference Result 505 states and 626 transitions. [2020-09-24 19:18:28,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 19:18:28,485 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 155 [2020-09-24 19:18:28,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:18:28,488 INFO L225 Difference]: With dead ends: 505 [2020-09-24 19:18:28,488 INFO L226 Difference]: Without dead ends: 320 [2020-09-24 19:18:28,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-09-24 19:18:28,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-09-24 19:18:28,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 274. [2020-09-24 19:18:28,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-09-24 19:18:28,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 328 transitions. [2020-09-24 19:18:28,529 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 328 transitions. Word has length 155 [2020-09-24 19:18:28,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:18:28,530 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 328 transitions. [2020-09-24 19:18:28,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 19:18:28,530 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 328 transitions. [2020-09-24 19:18:28,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-09-24 19:18:28,532 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:18:28,533 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:18:28,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-24 19:18:28,533 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:18:28,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:18:28,533 INFO L82 PathProgramCache]: Analyzing trace with hash -91173743, now seen corresponding path program 4 times [2020-09-24 19:18:28,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:18:28,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454739466] [2020-09-24 19:18:28,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:18:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:28,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:28,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:29,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:29,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:29,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:29,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-09-24 19:18:29,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:18:29,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1011 [2020-09-24 19:18:29,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:29,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 19:18:29,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-09-24 19:18:29,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-24 19:18:29,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:29,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:18:29,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:29,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:29,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:29,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:18:29,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:29,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:29,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:29,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:29,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:29,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:29,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:29,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 19:18:29,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:29,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:29,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:29,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:29,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:29,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:18:29,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:29,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:29,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:29,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:29,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:29,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 19:18:29,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:29,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:29,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:29,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:29,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-24 19:18:29,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:18:29,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-09-24 19:18:29,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:29,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:29,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:29,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:29,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:29,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-24 19:18:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:29,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:29,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:29,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:29,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:29,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 19:18:29,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:29,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:18:29,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:29,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 19:18:29,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:29,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-09-24 19:18:29,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:29,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:29,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:29,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 19:18:29,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:29,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 19:18:29,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:29,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:18:29,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:29,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 19:18:29,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:29,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-09-24 19:18:29,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:29,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:30,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:30,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-24 19:18:30,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:30,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-09-24 19:18:30,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:30,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:18:30,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 19:18:30,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-24 19:18:30,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:30,267 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2020-09-24 19:18:30,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454739466] [2020-09-24 19:18:30,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:18:30,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 19:18:30,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916276884] [2020-09-24 19:18:30,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 19:18:30,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:18:30,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 19:18:30,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-24 19:18:30,279 INFO L87 Difference]: Start difference. First operand 274 states and 328 transitions. Second operand 9 states. [2020-09-24 19:18:30,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:18:30,522 INFO L93 Difference]: Finished difference Result 374 states and 451 transitions. [2020-09-24 19:18:30,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 19:18:30,523 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 160 [2020-09-24 19:18:30,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:18:30,538 INFO L225 Difference]: With dead ends: 374 [2020-09-24 19:18:30,538 INFO L226 Difference]: Without dead ends: 353 [2020-09-24 19:18:30,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-24 19:18:30,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-09-24 19:18:30,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 326. [2020-09-24 19:18:30,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2020-09-24 19:18:30,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 397 transitions. [2020-09-24 19:18:30,563 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 397 transitions. Word has length 160 [2020-09-24 19:18:30,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:18:30,564 INFO L479 AbstractCegarLoop]: Abstraction has 326 states and 397 transitions. [2020-09-24 19:18:30,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 19:18:30,564 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 397 transitions. [2020-09-24 19:18:30,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-09-24 19:18:30,567 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:18:30,568 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:18:30,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-24 19:18:30,568 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:18:30,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:18:30,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1982333324, now seen corresponding path program 1 times [2020-09-24 19:18:30,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:18:30,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578511996] [2020-09-24 19:18:30,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:18:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:30,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:30,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:30,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:31,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:31,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-09-24 19:18:31,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:18:31,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1028 [2020-09-24 19:18:31,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:31,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 19:18:31,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-09-24 19:18:31,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-24 19:18:31,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:31,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:18:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:31,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:31,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:31,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:18:31,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:31,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:31,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:31,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:31,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:31,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:31,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 19:18:31,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 19:18:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:31,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:31,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:31,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:31,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:31,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:18:31,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:31,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:31,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:31,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:31,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:31,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 19:18:31,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:31,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:31,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:31,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:31,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-24 19:18:31,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:18:31,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-09-24 19:18:31,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:31,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:31,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:31,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:31,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:31,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-24 19:18:31,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:31,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:31,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:31,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:31,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:31,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 19:18:31,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:31,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:18:31,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:31,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 19:18:31,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:31,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-09-24 19:18:31,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:31,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:31,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:31,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 19:18:31,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:31,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-24 19:18:31,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:31,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:18:31,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:31,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 19:18:31,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:31,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-09-24 19:18:31,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:31,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:32,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:32,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-24 19:18:32,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:32,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-09-24 19:18:32,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:32,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:18:32,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 19:18:32,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 19:18:32,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:32,254 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2020-09-24 19:18:32,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578511996] [2020-09-24 19:18:32,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:18:32,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 19:18:32,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239571260] [2020-09-24 19:18:32,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 19:18:32,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:18:32,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 19:18:32,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-24 19:18:32,257 INFO L87 Difference]: Start difference. First operand 326 states and 397 transitions. Second operand 10 states. [2020-09-24 19:18:32,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:18:32,525 INFO L93 Difference]: Finished difference Result 363 states and 436 transitions. [2020-09-24 19:18:32,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 19:18:32,525 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 163 [2020-09-24 19:18:32,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:18:32,528 INFO L225 Difference]: With dead ends: 363 [2020-09-24 19:18:32,529 INFO L226 Difference]: Without dead ends: 332 [2020-09-24 19:18:32,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-09-24 19:18:32,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-09-24 19:18:32,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 287. [2020-09-24 19:18:32,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-09-24 19:18:32,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 345 transitions. [2020-09-24 19:18:32,566 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 345 transitions. Word has length 163 [2020-09-24 19:18:32,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:18:32,566 INFO L479 AbstractCegarLoop]: Abstraction has 287 states and 345 transitions. [2020-09-24 19:18:32,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 19:18:32,566 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 345 transitions. [2020-09-24 19:18:32,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-09-24 19:18:32,570 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:18:32,570 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:18:32,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-24 19:18:32,573 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:18:32,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:18:32,574 INFO L82 PathProgramCache]: Analyzing trace with hash 671026837, now seen corresponding path program 5 times [2020-09-24 19:18:32,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:18:32,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273933198] [2020-09-24 19:18:32,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:18:32,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:32,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:32,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:32,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:33,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:33,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:33,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-09-24 19:18:33,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:18:33,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-24 19:18:33,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:33,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 19:18:33,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-09-24 19:18:33,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-09-24 19:18:33,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:33,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:18:33,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:33,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:33,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:33,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:18:33,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:33,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:33,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:33,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:33,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:33,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:33,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:33,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 19:18:33,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:33,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:33,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:33,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:33,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:33,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 19:18:33,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:33,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:18:33,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:33,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 19:18:33,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:33,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 19:18:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:33,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:33,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:34,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:34,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-24 19:18:34,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:18:34,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 324 [2020-09-24 19:18:34,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:34,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:18:34,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:34,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-24 19:18:34,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:34,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-24 19:18:34,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:34,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:34,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:34,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 19:18:34,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:34,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-24 19:18:34,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:34,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:18:34,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:34,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 19:18:34,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:34,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-09-24 19:18:34,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:34,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:34,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:34,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 19:18:34,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:34,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 19:18:34,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:34,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:18:34,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:34,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 19:18:34,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:34,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-09-24 19:18:34,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:34,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:34,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:34,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-24 19:18:34,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:34,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-24 19:18:34,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:34,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:34,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 19:18:34,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:34,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:34,248 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-09-24 19:18:34,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273933198] [2020-09-24 19:18:34,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:18:34,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 19:18:34,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401400491] [2020-09-24 19:18:34,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 19:18:34,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:18:34,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 19:18:34,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-24 19:18:34,250 INFO L87 Difference]: Start difference. First operand 287 states and 345 transitions. Second operand 10 states. [2020-09-24 19:18:34,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:18:34,454 INFO L93 Difference]: Finished difference Result 372 states and 441 transitions. [2020-09-24 19:18:34,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 19:18:34,454 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 164 [2020-09-24 19:18:34,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:18:34,457 INFO L225 Difference]: With dead ends: 372 [2020-09-24 19:18:34,457 INFO L226 Difference]: Without dead ends: 294 [2020-09-24 19:18:34,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-24 19:18:34,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-09-24 19:18:34,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 290. [2020-09-24 19:18:34,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-09-24 19:18:34,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 351 transitions. [2020-09-24 19:18:34,478 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 351 transitions. Word has length 164 [2020-09-24 19:18:34,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:18:34,479 INFO L479 AbstractCegarLoop]: Abstraction has 290 states and 351 transitions. [2020-09-24 19:18:34,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 19:18:34,479 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 351 transitions. [2020-09-24 19:18:34,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-09-24 19:18:34,481 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:18:34,482 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:18:34,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-24 19:18:34,482 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:18:34,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:18:34,482 INFO L82 PathProgramCache]: Analyzing trace with hash 77258239, now seen corresponding path program 1 times [2020-09-24 19:18:34,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:18:34,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810811907] [2020-09-24 19:18:34,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:18:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:34,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:34,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:35,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:35,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:35,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-09-24 19:18:35,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:18:35,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1003 [2020-09-24 19:18:35,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:35,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 19:18:35,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-09-24 19:18:35,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 19:18:35,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:35,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:18:35,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:35,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:35,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:35,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:18:35,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:35,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:35,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:35,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:35,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:35,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:35,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:35,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 19:18:35,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:35,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:35,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:35,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 19:18:35,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:35,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 19:18:35,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:35,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:18:35,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:35,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 19:18:35,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:35,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 19:18:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:35,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:35,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:35,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:35,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-24 19:18:35,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:18:35,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-09-24 19:18:35,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:35,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:18:35,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:35,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-24 19:18:35,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:35,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-24 19:18:35,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:35,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:35,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:35,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 19:18:35,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:35,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 19:18:35,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:35,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:18:35,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:35,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 19:18:35,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:35,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-09-24 19:18:35,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:35,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:35,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:35,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 19:18:35,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:35,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 19:18:35,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:35,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:18:35,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:35,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 19:18:35,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:35,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-09-24 19:18:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:35,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:36,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:36,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-24 19:18:36,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:36,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-09-24 19:18:36,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:36,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:18:36,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 19:18:36,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-24 19:18:36,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:36,208 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-09-24 19:18:36,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810811907] [2020-09-24 19:18:36,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:18:36,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 19:18:36,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544919959] [2020-09-24 19:18:36,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 19:18:36,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:18:36,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 19:18:36,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-24 19:18:36,210 INFO L87 Difference]: Start difference. First operand 290 states and 351 transitions. Second operand 10 states. [2020-09-24 19:18:36,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:18:36,496 INFO L93 Difference]: Finished difference Result 338 states and 404 transitions. [2020-09-24 19:18:36,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 19:18:36,497 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 165 [2020-09-24 19:18:36,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:18:36,500 INFO L225 Difference]: With dead ends: 338 [2020-09-24 19:18:36,500 INFO L226 Difference]: Without dead ends: 326 [2020-09-24 19:18:36,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-09-24 19:18:36,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-09-24 19:18:36,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 318. [2020-09-24 19:18:36,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-09-24 19:18:36,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 384 transitions. [2020-09-24 19:18:36,525 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 384 transitions. Word has length 165 [2020-09-24 19:18:36,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:18:36,526 INFO L479 AbstractCegarLoop]: Abstraction has 318 states and 384 transitions. [2020-09-24 19:18:36,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 19:18:36,526 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 384 transitions. [2020-09-24 19:18:36,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-09-24 19:18:36,529 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:18:36,529 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:18:36,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-24 19:18:36,529 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:18:36,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:18:36,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1077259938, now seen corresponding path program 1 times [2020-09-24 19:18:36,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:18:36,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613764019] [2020-09-24 19:18:36,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:18:36,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:36,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:36,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking...