/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/heap-manipulation/merge_sort-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:42:08,733 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:42:08,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:42:08,779 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:42:08,780 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:42:08,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:42:08,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:42:08,793 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:42:08,796 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:42:08,800 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:42:08,801 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:42:08,802 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:42:08,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:42:08,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:42:08,808 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:42:08,810 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:42:08,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:42:08,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:42:08,814 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:42:08,817 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:42:08,819 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:42:08,819 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:42:08,820 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:42:08,821 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:42:08,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:42:08,837 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:42:08,837 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:42:08,841 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:42:08,842 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:42:08,843 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:42:08,843 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:42:08,847 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:42:08,847 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:42:08,851 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:42:08,852 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:42:08,852 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:42:08,853 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:42:08,853 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:42:08,853 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:42:08,854 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:42:08,855 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:42:08,856 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 15:42:08,896 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:42:08,897 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:42:08,899 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:42:08,899 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:42:08,899 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:42:08,899 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:42:08,900 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:42:08,900 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:42:08,900 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:42:08,900 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:42:08,901 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:42:08,902 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:42:08,902 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:42:08,902 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:42:08,902 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:42:08,903 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:42:08,903 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:42:08,903 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:42:08,903 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:42:08,903 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:42:08,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:42:08,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:42:08,904 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:42:08,904 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:42:08,904 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:42:08,905 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:42:08,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:42:08,905 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:42:08,905 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:42:08,905 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 15:42:09,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:42:09,233 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:42:09,237 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:42:09,238 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:42:09,239 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:42:09,240 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/merge_sort-2.i [2020-10-12 15:42:09,305 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/45fb1ccb6/5aee69700c9c49b492b99ecad762eb7e/FLAGbc19f81b2 [2020-10-12 15:42:09,913 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:42:09,914 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/merge_sort-2.i [2020-10-12 15:42:09,929 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/45fb1ccb6/5aee69700c9c49b492b99ecad762eb7e/FLAGbc19f81b2 [2020-10-12 15:42:10,119 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/45fb1ccb6/5aee69700c9c49b492b99ecad762eb7e [2020-10-12 15:42:10,130 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:42:10,133 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:42:10,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:42:10,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:42:10,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:42:10,139 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:42:10" (1/1) ... [2020-10-12 15:42:10,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fb9198f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:42:10, skipping insertion in model container [2020-10-12 15:42:10,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:42:10" (1/1) ... [2020-10-12 15:42:10,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:42:10,216 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:42:10,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:42:10,703 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:42:10,762 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:42:10,823 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:42:10,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:42:10 WrapperNode [2020-10-12 15:42:10,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:42:10,825 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:42:10,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:42:10,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:42:10,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:42:10" (1/1) ... [2020-10-12 15:42:10,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:42:10" (1/1) ... [2020-10-12 15:42:10,861 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:42:10" (1/1) ... [2020-10-12 15:42:10,862 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:42:10" (1/1) ... [2020-10-12 15:42:10,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:42:10" (1/1) ... [2020-10-12 15:42:10,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:42:10" (1/1) ... [2020-10-12 15:42:10,916 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:42:10" (1/1) ... [2020-10-12 15:42:10,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:42:10,926 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:42:10,926 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:42:10,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:42:10,927 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:42:10" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:42:10,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:42:10,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:42:10,993 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-12 15:42:10,994 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-12 15:42:10,994 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-10-12 15:42:10,994 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2020-10-12 15:42:10,994 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_pair [2020-10-12 15:42:10,994 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_sort_core [2020-10-12 15:42:10,994 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_before [2020-10-12 15:42:10,995 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_after [2020-10-12 15:42:10,995 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:42:10,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:42:10,995 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-12 15:42:10,995 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-12 15:42:10,995 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-12 15:42:10,996 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-12 15:42:10,996 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-12 15:42:10,996 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-12 15:42:10,996 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-12 15:42:10,996 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-12 15:42:10,997 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-12 15:42:10,997 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-12 15:42:10,997 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-12 15:42:10,997 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-12 15:42:10,997 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-12 15:42:10,998 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-12 15:42:10,998 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-12 15:42:10,998 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-12 15:42:10,998 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-12 15:42:10,998 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-12 15:42:10,999 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-12 15:42:10,999 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-12 15:42:10,999 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-12 15:42:10,999 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-12 15:42:10,999 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-12 15:42:11,000 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-12 15:42:11,000 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-12 15:42:11,000 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-12 15:42:11,000 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-12 15:42:11,000 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-12 15:42:11,000 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-12 15:42:11,000 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-12 15:42:11,001 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-12 15:42:11,001 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-12 15:42:11,001 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-12 15:42:11,001 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-12 15:42:11,001 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-12 15:42:11,001 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-12 15:42:11,001 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-12 15:42:11,002 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-12 15:42:11,002 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-12 15:42:11,002 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-12 15:42:11,002 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-12 15:42:11,002 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-12 15:42:11,002 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-12 15:42:11,002 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-12 15:42:11,003 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-12 15:42:11,003 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-12 15:42:11,003 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-12 15:42:11,003 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-12 15:42:11,003 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-12 15:42:11,003 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-12 15:42:11,003 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-12 15:42:11,004 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-12 15:42:11,004 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 15:42:11,004 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-12 15:42:11,004 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-12 15:42:11,004 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-12 15:42:11,004 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-12 15:42:11,005 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-12 15:42:11,005 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-12 15:42:11,005 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-12 15:42:11,005 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 15:42:11,005 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-12 15:42:11,005 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-12 15:42:11,005 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 15:42:11,006 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-12 15:42:11,006 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-12 15:42:11,006 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-12 15:42:11,006 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-12 15:42:11,006 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-12 15:42:11,006 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-12 15:42:11,007 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-12 15:42:11,007 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-12 15:42:11,007 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-12 15:42:11,007 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-12 15:42:11,007 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-12 15:42:11,007 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-12 15:42:11,007 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-12 15:42:11,007 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-12 15:42:11,008 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-12 15:42:11,008 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-12 15:42:11,008 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-12 15:42:11,008 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-12 15:42:11,008 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-12 15:42:11,008 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-12 15:42:11,008 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-12 15:42:11,008 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-12 15:42:11,009 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-12 15:42:11,009 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-12 15:42:11,009 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-12 15:42:11,009 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-12 15:42:11,009 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-12 15:42:11,009 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-12 15:42:11,009 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-12 15:42:11,010 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-12 15:42:11,010 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-12 15:42:11,010 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-12 15:42:11,010 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-12 15:42:11,010 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-12 15:42:11,010 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-12 15:42:11,010 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-12 15:42:11,010 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-12 15:42:11,010 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-12 15:42:11,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 15:42:11,011 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-10-12 15:42:11,011 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2020-10-12 15:42:11,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-12 15:42:11,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-12 15:42:11,016 INFO L130 BoogieDeclarations]: Found specification of procedure merge_pair [2020-10-12 15:42:11,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 15:42:11,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 15:42:11,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 15:42:11,017 INFO L130 BoogieDeclarations]: Found specification of procedure seq_sort_core [2020-10-12 15:42:11,017 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_before [2020-10-12 15:42:11,017 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_after [2020-10-12 15:42:11,017 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:42:11,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 15:42:11,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 15:42:11,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:42:11,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:42:11,792 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:42:11,793 INFO L295 CfgBuilder]: Removed 33 assume(true) statements. [2020-10-12 15:42:11,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:42:11 BoogieIcfgContainer [2020-10-12 15:42:11,798 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:42:11,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:42:11,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:42:11,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:42:11,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:42:10" (1/3) ... [2020-10-12 15:42:11,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70b816dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:42:11, skipping insertion in model container [2020-10-12 15:42:11,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:42:10" (2/3) ... [2020-10-12 15:42:11,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70b816dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:42:11, skipping insertion in model container [2020-10-12 15:42:11,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:42:11" (3/3) ... [2020-10-12 15:42:11,809 INFO L109 eAbstractionObserver]: Analyzing ICFG merge_sort-2.i [2020-10-12 15:42:11,821 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:42:11,830 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:42:11,846 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:42:11,873 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:42:11,873 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:42:11,873 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:42:11,873 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:42:11,873 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:42:11,874 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:42:11,874 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:42:11,874 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:42:11,896 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-10-12 15:42:11,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-12 15:42:11,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:11,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:42:11,904 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:11,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:11,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1873878464, now seen corresponding path program 1 times [2020-10-12 15:42:11,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:11,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676525638] [2020-10-12 15:42:11,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:12,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:12,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:12,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:12,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:12,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:12,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:42:12,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:42:12,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 303 [2020-10-12 15:42:12,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:12,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:42:12,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:42:12,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:42:12,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 15:42:12,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:12,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:12,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:12,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:12,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:12,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 15:42:12,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:12,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:12,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:12,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:12,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:12,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:42:12,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676525638] [2020-10-12 15:42:12,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:42:12,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 15:42:12,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325851661] [2020-10-12 15:42:12,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 15:42:12,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:12,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 15:42:12,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 15:42:12,522 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 6 states. [2020-10-12 15:42:13,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:13,145 INFO L93 Difference]: Finished difference Result 259 states and 448 transitions. [2020-10-12 15:42:13,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 15:42:13,148 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-12 15:42:13,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:13,163 INFO L225 Difference]: With dead ends: 259 [2020-10-12 15:42:13,163 INFO L226 Difference]: Without dead ends: 131 [2020-10-12 15:42:13,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:42:13,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-12 15:42:13,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 106. [2020-10-12 15:42:13,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-12 15:42:13,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 129 transitions. [2020-10-12 15:42:13,239 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 129 transitions. Word has length 13 [2020-10-12 15:42:13,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:13,240 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 129 transitions. [2020-10-12 15:42:13,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 15:42:13,240 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 129 transitions. [2020-10-12 15:42:13,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 15:42:13,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:13,242 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:42:13,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:42:13,242 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:13,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:13,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1496349220, now seen corresponding path program 1 times [2020-10-12 15:42:13,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:13,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235663443] [2020-10-12 15:42:13,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:13,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:13,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:13,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:13,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:13,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:13,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:13,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 15:42:13,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:42:13,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 464 [2020-10-12 15:42:13,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:13,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:42:13,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:42:13,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 15:42:13,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:13,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:13,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:13,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:13,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:13,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:13,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:42:13,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:13,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:13,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:13,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:13,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:13,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:42:13,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235663443] [2020-10-12 15:42:13,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:42:13,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 15:42:13,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215776681] [2020-10-12 15:42:13,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 15:42:13,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:13,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 15:42:13,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 15:42:13,784 INFO L87 Difference]: Start difference. First operand 106 states and 129 transitions. Second operand 6 states. [2020-10-12 15:42:14,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:14,175 INFO L93 Difference]: Finished difference Result 212 states and 261 transitions. [2020-10-12 15:42:14,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 15:42:14,176 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-12 15:42:14,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:14,178 INFO L225 Difference]: With dead ends: 212 [2020-10-12 15:42:14,178 INFO L226 Difference]: Without dead ends: 118 [2020-10-12 15:42:14,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:42:14,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-12 15:42:14,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 108. [2020-10-12 15:42:14,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-12 15:42:14,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 131 transitions. [2020-10-12 15:42:14,197 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 131 transitions. Word has length 21 [2020-10-12 15:42:14,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:14,198 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 131 transitions. [2020-10-12 15:42:14,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 15:42:14,198 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 131 transitions. [2020-10-12 15:42:14,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 15:42:14,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:14,199 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 15:42:14,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:42:14,200 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:14,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:14,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1145945773, now seen corresponding path program 1 times [2020-10-12 15:42:14,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:14,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790100723] [2020-10-12 15:42:14,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:14,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:14,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:14,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:14,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:14,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 15:42:14,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:42:14,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 342 [2020-10-12 15:42:14,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:14,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:42:14,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:42:14,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:42:14,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:14,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:14,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:14,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:14,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:14,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:14,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:14,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:42:14,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:14,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:14,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:14,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:14,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:14,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:42:14,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790100723] [2020-10-12 15:42:14,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:42:14,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 15:42:14,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290481252] [2020-10-12 15:42:14,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:42:14,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:14,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:42:14,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:42:14,714 INFO L87 Difference]: Start difference. First operand 108 states and 131 transitions. Second operand 8 states. [2020-10-12 15:42:15,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:15,488 INFO L93 Difference]: Finished difference Result 201 states and 246 transitions. [2020-10-12 15:42:15,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:42:15,489 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-12 15:42:15,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:15,492 INFO L225 Difference]: With dead ends: 201 [2020-10-12 15:42:15,492 INFO L226 Difference]: Without dead ends: 198 [2020-10-12 15:42:15,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:42:15,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-12 15:42:15,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 153. [2020-10-12 15:42:15,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-12 15:42:15,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 187 transitions. [2020-10-12 15:42:15,514 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 187 transitions. Word has length 27 [2020-10-12 15:42:15,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:15,514 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 187 transitions. [2020-10-12 15:42:15,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:42:15,515 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 187 transitions. [2020-10-12 15:42:15,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 15:42:15,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:15,516 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 15:42:15,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:42:15,516 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:15,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:15,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1471361763, now seen corresponding path program 1 times [2020-10-12 15:42:15,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:15,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115119313] [2020-10-12 15:42:15,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:15,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:15,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:15,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:15,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 15:42:15,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:42:15,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 298 [2020-10-12 15:42:15,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:15,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:42:15,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:42:15,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:42:15,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:15,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:15,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:15,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:15,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:15,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:15,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:15,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:42:15,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:15,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:15,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:15,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:15,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:15,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:42:15,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115119313] [2020-10-12 15:42:15,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:42:15,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 15:42:15,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417068550] [2020-10-12 15:42:15,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:42:15,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:15,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:42:15,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:42:15,952 INFO L87 Difference]: Start difference. First operand 153 states and 187 transitions. Second operand 8 states. [2020-10-12 15:42:16,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:16,626 INFO L93 Difference]: Finished difference Result 234 states and 288 transitions. [2020-10-12 15:42:16,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:42:16,627 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-12 15:42:16,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:16,628 INFO L225 Difference]: With dead ends: 234 [2020-10-12 15:42:16,629 INFO L226 Difference]: Without dead ends: 148 [2020-10-12 15:42:16,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:42:16,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-12 15:42:16,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 134. [2020-10-12 15:42:16,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-12 15:42:16,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 160 transitions. [2020-10-12 15:42:16,647 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 160 transitions. Word has length 27 [2020-10-12 15:42:16,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:16,648 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 160 transitions. [2020-10-12 15:42:16,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:42:16,648 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 160 transitions. [2020-10-12 15:42:16,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:42:16,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:16,649 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 15:42:16,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 15:42:16,650 INFO L427 AbstractCegarLoop]: === Iteration 5 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:16,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:16,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1648323131, now seen corresponding path program 1 times [2020-10-12 15:42:16,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:16,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936614403] [2020-10-12 15:42:16,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:16,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:16,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:16,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:16,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:16,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 15:42:16,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:42:16,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 301 [2020-10-12 15:42:16,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:16,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:42:16,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:42:16,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:42:16,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:17,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:17,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:17,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:17,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:17,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:17,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:42:17,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:17,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:17,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:17,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:17,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:42:17,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:42:17,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936614403] [2020-10-12 15:42:17,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:42:17,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 15:42:17,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063394512] [2020-10-12 15:42:17,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:42:17,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:17,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:42:17,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:42:17,120 INFO L87 Difference]: Start difference. First operand 134 states and 160 transitions. Second operand 8 states. [2020-10-12 15:42:17,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:17,906 INFO L93 Difference]: Finished difference Result 175 states and 212 transitions. [2020-10-12 15:42:17,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 15:42:17,907 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-12 15:42:17,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:17,909 INFO L225 Difference]: With dead ends: 175 [2020-10-12 15:42:17,910 INFO L226 Difference]: Without dead ends: 172 [2020-10-12 15:42:17,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:42:17,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-12 15:42:17,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 140. [2020-10-12 15:42:17,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-12 15:42:17,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 166 transitions. [2020-10-12 15:42:17,926 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 166 transitions. Word has length 30 [2020-10-12 15:42:17,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:17,926 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 166 transitions. [2020-10-12 15:42:17,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:42:17,927 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 166 transitions. [2020-10-12 15:42:17,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:42:17,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:17,928 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 15:42:17,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 15:42:17,929 INFO L427 AbstractCegarLoop]: === Iteration 6 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:17,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:17,929 INFO L82 PathProgramCache]: Analyzing trace with hash 671486784, now seen corresponding path program 1 times [2020-10-12 15:42:17,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:17,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027583829] [2020-10-12 15:42:17,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:17,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:17,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:18,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:18,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 15:42:18,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:18,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-12 15:42:18,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:18,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:42:18,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:42:18,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:42:18,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:18,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:18,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:18,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:18,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:18,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:18,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:18,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:42:18,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:18,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:18,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:18,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:18,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:42:18,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:42:18,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027583829] [2020-10-12 15:42:18,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:42:18,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-12 15:42:18,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115713429] [2020-10-12 15:42:18,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:42:18,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:18,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:42:18,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:42:18,251 INFO L87 Difference]: Start difference. First operand 140 states and 166 transitions. Second operand 9 states. [2020-10-12 15:42:19,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:19,132 INFO L93 Difference]: Finished difference Result 179 states and 217 transitions. [2020-10-12 15:42:19,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:42:19,133 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-12 15:42:19,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:19,136 INFO L225 Difference]: With dead ends: 179 [2020-10-12 15:42:19,136 INFO L226 Difference]: Without dead ends: 176 [2020-10-12 15:42:19,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:42:19,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-12 15:42:19,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-10-12 15:42:19,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-12 15:42:19,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 168 transitions. [2020-10-12 15:42:19,153 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 168 transitions. Word has length 33 [2020-10-12 15:42:19,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:19,154 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 168 transitions. [2020-10-12 15:42:19,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:42:19,154 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 168 transitions. [2020-10-12 15:42:19,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:42:19,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:19,156 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 15:42:19,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 15:42:19,156 INFO L427 AbstractCegarLoop]: === Iteration 7 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:19,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:19,157 INFO L82 PathProgramCache]: Analyzing trace with hash -480098422, now seen corresponding path program 2 times [2020-10-12 15:42:19,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:19,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049658398] [2020-10-12 15:42:19,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:19,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:19,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:19,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:19,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:20,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:20,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 15:42:20,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:42:20,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 908 [2020-10-12 15:42:20,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:20,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:42:20,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:42:20,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:42:20,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:20,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:20,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:20,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:20,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:20,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:20,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:20,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:42:20,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:20,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:20,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:20,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:20,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:42:20,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:42:20,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049658398] [2020-10-12 15:42:20,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:42:20,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:42:20,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127441473] [2020-10-12 15:42:20,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:42:20,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:20,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:42:20,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:42:20,233 INFO L87 Difference]: Start difference. First operand 143 states and 168 transitions. Second operand 9 states. [2020-10-12 15:42:21,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:21,201 INFO L93 Difference]: Finished difference Result 228 states and 277 transitions. [2020-10-12 15:42:21,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:42:21,201 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-12 15:42:21,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:21,203 INFO L225 Difference]: With dead ends: 228 [2020-10-12 15:42:21,204 INFO L226 Difference]: Without dead ends: 164 [2020-10-12 15:42:21,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:42:21,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-12 15:42:21,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 133. [2020-10-12 15:42:21,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-12 15:42:21,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 156 transitions. [2020-10-12 15:42:21,218 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 156 transitions. Word has length 33 [2020-10-12 15:42:21,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:21,218 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 156 transitions. [2020-10-12 15:42:21,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:42:21,219 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 156 transitions. [2020-10-12 15:42:21,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:42:21,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:21,220 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 15:42:21,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 15:42:21,220 INFO L427 AbstractCegarLoop]: === Iteration 8 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:21,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:21,221 INFO L82 PathProgramCache]: Analyzing trace with hash -805514412, now seen corresponding path program 2 times [2020-10-12 15:42:21,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:21,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255995854] [2020-10-12 15:42:21,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:21,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:21,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:21,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:21,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:21,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 15:42:21,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:42:21,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 552 [2020-10-12 15:42:21,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:21,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:42:21,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:42:21,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:42:21,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:21,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:21,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:21,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:21,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:21,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:21,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:21,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:42:21,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:21,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:21,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:21,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:21,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:21,950 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:42:21,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255995854] [2020-10-12 15:42:21,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:42:21,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:42:21,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336820404] [2020-10-12 15:42:21,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:42:21,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:21,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:42:21,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:42:21,952 INFO L87 Difference]: Start difference. First operand 133 states and 156 transitions. Second operand 9 states. [2020-10-12 15:42:23,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:23,011 INFO L93 Difference]: Finished difference Result 166 states and 200 transitions. [2020-10-12 15:42:23,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:42:23,012 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-12 15:42:23,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:23,014 INFO L225 Difference]: With dead ends: 166 [2020-10-12 15:42:23,014 INFO L226 Difference]: Without dead ends: 163 [2020-10-12 15:42:23,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:42:23,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-12 15:42:23,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 136. [2020-10-12 15:42:23,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-12 15:42:23,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 159 transitions. [2020-10-12 15:42:23,032 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 159 transitions. Word has length 33 [2020-10-12 15:42:23,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:23,032 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 159 transitions. [2020-10-12 15:42:23,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:42:23,032 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 159 transitions. [2020-10-12 15:42:23,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 15:42:23,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:23,037 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 15:42:23,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 15:42:23,038 INFO L427 AbstractCegarLoop]: === Iteration 9 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:23,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:23,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1334119933, now seen corresponding path program 1 times [2020-10-12 15:42:23,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:23,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587165354] [2020-10-12 15:42:23,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:23,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:23,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:23,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:23,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:23,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 15:42:23,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:42:23,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 286 [2020-10-12 15:42:23,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:23,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:42:23,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 15:42:23,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:42:23,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:23,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:23,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:23,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:23,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:23,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:23,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:23,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:42:23,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:23,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:23,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:23,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:23,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:42:23,416 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 15:42:23,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587165354] [2020-10-12 15:42:23,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:42:23,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 15:42:23,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880459526] [2020-10-12 15:42:23,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:42:23,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:23,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:42:23,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:42:23,424 INFO L87 Difference]: Start difference. First operand 136 states and 159 transitions. Second operand 8 states. [2020-10-12 15:42:24,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:24,161 INFO L93 Difference]: Finished difference Result 158 states and 188 transitions. [2020-10-12 15:42:24,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 15:42:24,162 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-12 15:42:24,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:24,166 INFO L225 Difference]: With dead ends: 158 [2020-10-12 15:42:24,167 INFO L226 Difference]: Without dead ends: 155 [2020-10-12 15:42:24,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:42:24,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-12 15:42:24,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 139. [2020-10-12 15:42:24,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-12 15:42:24,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 162 transitions. [2020-10-12 15:42:24,194 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 162 transitions. Word has length 36 [2020-10-12 15:42:24,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:24,194 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 162 transitions. [2020-10-12 15:42:24,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:42:24,195 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 162 transitions. [2020-10-12 15:42:24,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 15:42:24,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:24,198 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 15:42:24,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 15:42:24,199 INFO L427 AbstractCegarLoop]: === Iteration 10 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:24,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:24,200 INFO L82 PathProgramCache]: Analyzing trace with hash 638254049, now seen corresponding path program 1 times [2020-10-12 15:42:24,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:24,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974109007] [2020-10-12 15:42:24,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:24,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:24,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:24,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:24,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 15:42:24,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:24,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-12 15:42:24,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:24,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:42:24,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 15:42:24,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:42:24,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:24,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:24,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:24,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:24,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:24,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:24,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:42:24,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:24,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:24,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:24,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:24,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:24,602 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 15:42:24,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974109007] [2020-10-12 15:42:24,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:42:24,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-12 15:42:24,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492203730] [2020-10-12 15:42:24,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:42:24,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:24,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:42:24,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:42:24,606 INFO L87 Difference]: Start difference. First operand 139 states and 162 transitions. Second operand 9 states. [2020-10-12 15:42:25,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:25,397 INFO L93 Difference]: Finished difference Result 162 states and 194 transitions. [2020-10-12 15:42:25,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:42:25,397 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-10-12 15:42:25,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:25,399 INFO L225 Difference]: With dead ends: 162 [2020-10-12 15:42:25,400 INFO L226 Difference]: Without dead ends: 159 [2020-10-12 15:42:25,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:42:25,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-12 15:42:25,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 142. [2020-10-12 15:42:25,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-12 15:42:25,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 165 transitions. [2020-10-12 15:42:25,421 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 165 transitions. Word has length 39 [2020-10-12 15:42:25,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:25,421 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 165 transitions. [2020-10-12 15:42:25,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:42:25,422 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 165 transitions. [2020-10-12 15:42:25,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 15:42:25,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:25,423 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 15:42:25,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 15:42:25,423 INFO L427 AbstractCegarLoop]: === Iteration 11 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:25,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:25,424 INFO L82 PathProgramCache]: Analyzing trace with hash 235623500, now seen corresponding path program 1 times [2020-10-12 15:42:25,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:25,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438788491] [2020-10-12 15:42:25,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:25,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:25,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:25,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:25,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:25,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:26,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:26,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 15:42:26,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:42:26,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1285 [2020-10-12 15:42:26,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:26,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:42:26,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 15:42:26,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 15:42:26,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:26,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:26,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:26,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:26,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:26,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:26,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:26,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:42:26,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:26,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:26,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:26,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:26,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:26,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 15:42:26,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:26,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:26,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:26,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:26,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:42:26,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:42:26,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-12 15:42:26,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:26,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:42:26,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:26,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:42:26,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 15:42:26,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438788491] [2020-10-12 15:42:26,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:42:26,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 15:42:26,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965922919] [2020-10-12 15:42:26,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:42:26,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:26,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:42:26,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:42:26,866 INFO L87 Difference]: Start difference. First operand 142 states and 165 transitions. Second operand 8 states. [2020-10-12 15:42:27,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:27,615 INFO L93 Difference]: Finished difference Result 176 states and 208 transitions. [2020-10-12 15:42:27,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:42:27,616 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-10-12 15:42:27,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:27,621 INFO L225 Difference]: With dead ends: 176 [2020-10-12 15:42:27,621 INFO L226 Difference]: Without dead ends: 173 [2020-10-12 15:42:27,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:42:27,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-12 15:42:27,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 147. [2020-10-12 15:42:27,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-12 15:42:27,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 171 transitions. [2020-10-12 15:42:27,650 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 171 transitions. Word has length 41 [2020-10-12 15:42:27,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:27,651 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 171 transitions. [2020-10-12 15:42:27,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:42:27,651 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 171 transitions. [2020-10-12 15:42:27,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 15:42:27,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:27,653 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 15:42:27,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 15:42:27,654 INFO L427 AbstractCegarLoop]: === Iteration 12 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:27,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:27,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1351973035, now seen corresponding path program 1 times [2020-10-12 15:42:27,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:27,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464932918] [2020-10-12 15:42:27,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:27,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:27,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:27,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:27,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:27,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:29,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:29,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 15:42:29,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:42:29,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1991 [2020-10-12 15:42:29,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:29,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:42:29,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 15:42:29,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 15:42:29,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:42:29,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:29,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:29,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:29,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:29,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:29,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:29,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:42:29,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:29,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:29,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:29,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:29,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:29,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 15:42:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:29,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:29,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:29,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:29,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:42:29,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:42:29,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-12 15:42:29,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:29,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:42:29,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:29,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:42:29,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:29,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 15:42:29,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464932918] [2020-10-12 15:42:29,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:42:29,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 15:42:29,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706971707] [2020-10-12 15:42:29,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:42:29,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:29,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:42:29,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:42:29,909 INFO L87 Difference]: Start difference. First operand 147 states and 171 transitions. Second operand 10 states. [2020-10-12 15:42:30,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:30,771 INFO L93 Difference]: Finished difference Result 179 states and 211 transitions. [2020-10-12 15:42:30,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:42:30,772 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-10-12 15:42:30,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:30,773 INFO L225 Difference]: With dead ends: 179 [2020-10-12 15:42:30,774 INFO L226 Difference]: Without dead ends: 176 [2020-10-12 15:42:30,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:42:30,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-12 15:42:30,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 155. [2020-10-12 15:42:30,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-12 15:42:30,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 180 transitions. [2020-10-12 15:42:30,790 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 180 transitions. Word has length 44 [2020-10-12 15:42:30,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:30,790 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 180 transitions. [2020-10-12 15:42:30,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:42:30,791 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 180 transitions. [2020-10-12 15:42:30,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 15:42:30,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:30,792 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:42:30,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 15:42:30,792 INFO L427 AbstractCegarLoop]: === Iteration 13 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:30,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:30,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1494948946, now seen corresponding path program 1 times [2020-10-12 15:42:30,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:30,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118082567] [2020-10-12 15:42:30,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:30,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:30,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:30,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:30,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:30,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:32,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:32,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 15:42:32,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:42:32,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1443 [2020-10-12 15:42:32,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:32,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:42:32,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:42:32,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 15:42:32,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:32,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:32,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:32,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:32,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:32,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:32,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:42:32,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:32,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:32,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:32,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:32,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:32,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:42:32,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118082567] [2020-10-12 15:42:32,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:42:32,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:42:32,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715374130] [2020-10-12 15:42:32,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:42:32,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:32,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:42:32,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:42:32,369 INFO L87 Difference]: Start difference. First operand 155 states and 180 transitions. Second operand 9 states. [2020-10-12 15:42:33,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:33,307 INFO L93 Difference]: Finished difference Result 176 states and 210 transitions. [2020-10-12 15:42:33,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:42:33,308 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2020-10-12 15:42:33,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:33,311 INFO L225 Difference]: With dead ends: 176 [2020-10-12 15:42:33,312 INFO L226 Difference]: Without dead ends: 172 [2020-10-12 15:42:33,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:42:33,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-12 15:42:33,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 161. [2020-10-12 15:42:33,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-12 15:42:33,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 187 transitions. [2020-10-12 15:42:33,339 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 187 transitions. Word has length 44 [2020-10-12 15:42:33,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:33,340 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 187 transitions. [2020-10-12 15:42:33,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:42:33,340 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 187 transitions. [2020-10-12 15:42:33,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 15:42:33,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:33,341 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 15:42:33,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 15:42:33,342 INFO L427 AbstractCegarLoop]: === Iteration 14 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:33,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:33,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1691394343, now seen corresponding path program 1 times [2020-10-12 15:42:33,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:33,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828340081] [2020-10-12 15:42:33,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:33,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:33,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:33,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:33,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:33,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 15:42:33,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:42:33,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 370 [2020-10-12 15:42:33,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:33,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:42:33,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 15:42:33,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 15:42:33,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:33,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:33,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:33,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:33,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:33,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:33,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:42:33,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:33,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:33,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:33,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:33,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:33,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 15:42:33,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:33,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:33,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:33,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:42:33,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:33,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-12 15:42:33,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:33,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:42:33,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:33,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:42:33,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:33,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 15:42:33,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828340081] [2020-10-12 15:42:33,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:42:33,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 15:42:33,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162180317] [2020-10-12 15:42:33,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:42:33,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:33,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:42:33,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:42:33,909 INFO L87 Difference]: Start difference. First operand 161 states and 187 transitions. Second operand 10 states. [2020-10-12 15:42:34,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:34,730 INFO L93 Difference]: Finished difference Result 182 states and 214 transitions. [2020-10-12 15:42:34,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:42:34,731 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2020-10-12 15:42:34,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:34,733 INFO L225 Difference]: With dead ends: 182 [2020-10-12 15:42:34,733 INFO L226 Difference]: Without dead ends: 179 [2020-10-12 15:42:34,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:42:34,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-12 15:42:34,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 164. [2020-10-12 15:42:34,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-12 15:42:34,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 190 transitions. [2020-10-12 15:42:34,750 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 190 transitions. Word has length 47 [2020-10-12 15:42:34,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:34,751 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 190 transitions. [2020-10-12 15:42:34,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:42:34,751 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 190 transitions. [2020-10-12 15:42:34,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 15:42:34,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:34,752 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:42:34,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 15:42:34,752 INFO L427 AbstractCegarLoop]: === Iteration 15 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:34,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:34,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1317593071, now seen corresponding path program 1 times [2020-10-12 15:42:34,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:34,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762675213] [2020-10-12 15:42:34,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:34,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:34,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:34,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:35,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:35,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 15:42:35,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:42:35,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 485 [2020-10-12 15:42:35,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:35,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:42:35,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:42:35,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 15:42:35,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:35,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:35,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:35,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:35,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:35,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:35,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:35,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:42:35,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:35,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:35,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:35,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:35,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:35,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:42:35,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762675213] [2020-10-12 15:42:35,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:42:35,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:42:35,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649294932] [2020-10-12 15:42:35,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:42:35,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:35,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:42:35,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:42:35,744 INFO L87 Difference]: Start difference. First operand 164 states and 190 transitions. Second operand 13 states. [2020-10-12 15:42:37,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:37,185 INFO L93 Difference]: Finished difference Result 272 states and 322 transitions. [2020-10-12 15:42:37,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:42:37,186 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-10-12 15:42:37,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:37,188 INFO L225 Difference]: With dead ends: 272 [2020-10-12 15:42:37,188 INFO L226 Difference]: Without dead ends: 269 [2020-10-12 15:42:37,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:42:37,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-12 15:42:37,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 223. [2020-10-12 15:42:37,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-12 15:42:37,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 260 transitions. [2020-10-12 15:42:37,205 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 260 transitions. Word has length 47 [2020-10-12 15:42:37,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:37,206 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 260 transitions. [2020-10-12 15:42:37,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:42:37,206 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 260 transitions. [2020-10-12 15:42:37,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 15:42:37,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:37,207 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:42:37,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 15:42:37,207 INFO L427 AbstractCegarLoop]: === Iteration 16 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:37,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:37,208 INFO L82 PathProgramCache]: Analyzing trace with hash 992177081, now seen corresponding path program 1 times [2020-10-12 15:42:37,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:37,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589217754] [2020-10-12 15:42:37,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:37,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:37,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:37,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:37,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:37,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 15:42:37,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:42:37,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 527 [2020-10-12 15:42:37,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:37,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:42:37,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:42:37,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 15:42:37,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:38,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:38,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:38,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:38,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:38,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:38,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:42:38,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:38,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:38,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:38,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:38,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:38,047 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:42:38,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589217754] [2020-10-12 15:42:38,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:42:38,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:42:38,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744064188] [2020-10-12 15:42:38,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:42:38,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:38,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:42:38,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:42:38,052 INFO L87 Difference]: Start difference. First operand 223 states and 260 transitions. Second operand 13 states. [2020-10-12 15:42:39,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:39,353 INFO L93 Difference]: Finished difference Result 310 states and 370 transitions. [2020-10-12 15:42:39,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:42:39,355 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-10-12 15:42:39,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:39,358 INFO L225 Difference]: With dead ends: 310 [2020-10-12 15:42:39,358 INFO L226 Difference]: Without dead ends: 219 [2020-10-12 15:42:39,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:42:39,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-12 15:42:39,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 204. [2020-10-12 15:42:39,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-12 15:42:39,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 233 transitions. [2020-10-12 15:42:39,383 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 233 transitions. Word has length 47 [2020-10-12 15:42:39,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:39,383 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 233 transitions. [2020-10-12 15:42:39,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:42:39,384 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 233 transitions. [2020-10-12 15:42:39,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 15:42:39,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:39,385 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:42:39,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 15:42:39,385 INFO L427 AbstractCegarLoop]: === Iteration 17 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:39,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:39,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1821749989, now seen corresponding path program 1 times [2020-10-12 15:42:39,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:39,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492428188] [2020-10-12 15:42:39,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:39,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:39,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:39,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:39,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:39,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:39,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:39,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:39,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:39,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:41,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:44,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:44,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:44,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 15:42:44,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 15:42:44,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 15:42:44,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:44,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:42:44,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 15:42:44,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 15:42:44,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:44,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:44,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:44,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:44,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:44,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:44,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:44,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:42:44,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:44,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:44,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:44,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:44,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:44,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 15:42:44,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:44,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:44,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:44,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:42:44,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:44,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:42:44,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:44,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:44,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:44,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:44,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:44,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 15:42:44,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:44,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:44,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:44,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:42:44,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:44,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 15:42:44,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:44,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:42:44,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:42:44,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:42:44,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:44,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 15:42:44,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492428188] [2020-10-12 15:42:44,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:42:44,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:42:44,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929109290] [2020-10-12 15:42:44,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:42:44,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:44,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:42:44,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:42:44,582 INFO L87 Difference]: Start difference. First operand 204 states and 233 transitions. Second operand 11 states. [2020-10-12 15:42:45,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:45,494 INFO L93 Difference]: Finished difference Result 238 states and 274 transitions. [2020-10-12 15:42:45,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:42:45,495 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2020-10-12 15:42:45,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:45,497 INFO L225 Difference]: With dead ends: 238 [2020-10-12 15:42:45,497 INFO L226 Difference]: Without dead ends: 216 [2020-10-12 15:42:45,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:42:45,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-12 15:42:45,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 211. [2020-10-12 15:42:45,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-12 15:42:45,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 241 transitions. [2020-10-12 15:42:45,516 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 241 transitions. Word has length 50 [2020-10-12 15:42:45,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:45,516 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 241 transitions. [2020-10-12 15:42:45,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:42:45,516 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 241 transitions. [2020-10-12 15:42:45,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 15:42:45,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:45,517 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:42:45,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 15:42:45,518 INFO L427 AbstractCegarLoop]: === Iteration 18 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:45,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:45,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1200260978, now seen corresponding path program 1 times [2020-10-12 15:42:45,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:45,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152888252] [2020-10-12 15:42:45,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:45,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:45,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:45,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:45,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:45,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:45,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:45,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:45,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:46,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:48,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:50,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:50,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 15:42:50,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 15:42:50,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 15:42:50,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:50,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:42:50,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 15:42:50,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 15:42:50,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:50,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:50,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:50,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:50,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:50,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:50,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:42:50,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:50,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:50,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:50,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:50,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:50,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 15:42:50,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:50,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:50,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:50,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:50,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:42:50,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:42:50,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-12 15:42:50,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:50,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:42:50,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:50,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:42:50,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:50,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 15:42:50,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:50,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:50,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:50,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:50,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-12 15:42:50,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:42:50,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-12 15:42:50,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:50,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:42:50,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:50,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 15:42:50,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:42:50,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 15:42:50,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152888252] [2020-10-12 15:42:50,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:42:50,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-12 15:42:50,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967537662] [2020-10-12 15:42:50,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:42:50,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:50,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:42:50,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:42:50,786 INFO L87 Difference]: Start difference. First operand 211 states and 241 transitions. Second operand 13 states. [2020-10-12 15:42:52,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:52,083 INFO L93 Difference]: Finished difference Result 252 states and 295 transitions. [2020-10-12 15:42:52,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:42:52,084 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-12 15:42:52,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:52,089 INFO L225 Difference]: With dead ends: 252 [2020-10-12 15:42:52,089 INFO L226 Difference]: Without dead ends: 249 [2020-10-12 15:42:52,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:42:52,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-12 15:42:52,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 220. [2020-10-12 15:42:52,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-12 15:42:52,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 256 transitions. [2020-10-12 15:42:52,115 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 256 transitions. Word has length 51 [2020-10-12 15:42:52,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:52,115 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 256 transitions. [2020-10-12 15:42:52,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:42:52,115 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 256 transitions. [2020-10-12 15:42:52,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 15:42:52,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:52,116 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:42:52,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 15:42:52,117 INFO L427 AbstractCegarLoop]: === Iteration 19 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:52,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:52,117 INFO L82 PathProgramCache]: Analyzing trace with hash 532870687, now seen corresponding path program 1 times [2020-10-12 15:42:52,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:52,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164928165] [2020-10-12 15:42:52,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:52,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:52,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:52,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:52,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:52,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 15:42:52,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:42:52,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 504 [2020-10-12 15:42:52,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:52,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:42:52,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:42:52,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 15:42:52,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:52,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:52,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:52,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:52,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:52,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:52,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:52,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:42:52,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:52,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:52,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:52,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:52,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:52,781 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:42:52,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164928165] [2020-10-12 15:42:52,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:42:52,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:42:52,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691124671] [2020-10-12 15:42:52,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:42:52,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:52,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:42:52,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:42:52,784 INFO L87 Difference]: Start difference. First operand 220 states and 256 transitions. Second operand 13 states. [2020-10-12 15:42:53,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:53,959 INFO L93 Difference]: Finished difference Result 272 states and 333 transitions. [2020-10-12 15:42:53,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:42:53,960 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-10-12 15:42:53,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:53,963 INFO L225 Difference]: With dead ends: 272 [2020-10-12 15:42:53,963 INFO L226 Difference]: Without dead ends: 269 [2020-10-12 15:42:53,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:42:53,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-12 15:42:53,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 226. [2020-10-12 15:42:53,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-12 15:42:53,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 262 transitions. [2020-10-12 15:42:53,983 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 262 transitions. Word has length 50 [2020-10-12 15:42:53,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:53,984 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 262 transitions. [2020-10-12 15:42:53,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:42:53,984 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 262 transitions. [2020-10-12 15:42:53,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 15:42:53,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:53,985 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 15:42:53,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 15:42:53,985 INFO L427 AbstractCegarLoop]: === Iteration 20 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:53,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:53,986 INFO L82 PathProgramCache]: Analyzing trace with hash -596228507, now seen corresponding path program 1 times [2020-10-12 15:42:53,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:53,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162794439] [2020-10-12 15:42:53,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:53,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:54,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:54,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:54,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:54,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:54,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 15:42:54,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:42:54,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 363 [2020-10-12 15:42:54,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:54,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:42:54,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 15:42:54,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 15:42:54,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:54,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:54,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:54,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:54,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:54,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:54,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:54,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:42:54,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:54,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:54,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:54,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:54,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:54,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 15:42:54,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:54,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:54,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:54,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:42:54,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:54,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 15:42:54,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:54,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:42:54,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:54,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:42:54,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:54,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 15:42:54,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162794439] [2020-10-12 15:42:54,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:42:54,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-12 15:42:54,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104530614] [2020-10-12 15:42:54,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:42:54,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:54,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:42:54,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:42:54,519 INFO L87 Difference]: Start difference. First operand 226 states and 262 transitions. Second operand 11 states. [2020-10-12 15:42:55,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:55,719 INFO L93 Difference]: Finished difference Result 246 states and 288 transitions. [2020-10-12 15:42:55,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:42:55,720 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2020-10-12 15:42:55,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:55,722 INFO L225 Difference]: With dead ends: 246 [2020-10-12 15:42:55,722 INFO L226 Difference]: Without dead ends: 241 [2020-10-12 15:42:55,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:42:55,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-12 15:42:55,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 230. [2020-10-12 15:42:55,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-12 15:42:55,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 266 transitions. [2020-10-12 15:42:55,750 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 266 transitions. Word has length 53 [2020-10-12 15:42:55,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:55,751 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 266 transitions. [2020-10-12 15:42:55,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:42:55,751 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 266 transitions. [2020-10-12 15:42:55,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 15:42:55,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:55,758 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:42:55,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 15:42:55,758 INFO L427 AbstractCegarLoop]: === Iteration 21 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:55,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:55,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1503210199, now seen corresponding path program 1 times [2020-10-12 15:42:55,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:55,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106138520] [2020-10-12 15:42:55,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:55,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:55,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:55,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:55,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:55,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:57,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:57,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:00,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:00,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 15:43:00,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:43:00,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 15:43:00,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:00,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:43:00,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-12 15:43:00,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:43:00,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:00,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:00,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:00,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:00,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:00,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:00,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:00,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:43:00,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:00,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:00,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:00,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:00,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:00,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 15:43:00,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:00,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:00,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:00,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:43:00,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:00,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:43:00,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:00,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:00,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:00,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:00,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:00,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 15:43:00,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:00,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:00,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:00,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-12 15:43:00,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:00,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 15:43:00,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:00,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:43:00,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:00,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:43:00,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 15:43:00,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106138520] [2020-10-12 15:43:00,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:43:00,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-12 15:43:00,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866308439] [2020-10-12 15:43:00,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:43:00,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:00,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:43:00,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:43:00,946 INFO L87 Difference]: Start difference. First operand 230 states and 266 transitions. Second operand 12 states. [2020-10-12 15:43:02,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:02,237 INFO L93 Difference]: Finished difference Result 268 states and 320 transitions. [2020-10-12 15:43:02,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:43:02,237 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2020-10-12 15:43:02,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:02,239 INFO L225 Difference]: With dead ends: 268 [2020-10-12 15:43:02,239 INFO L226 Difference]: Without dead ends: 265 [2020-10-12 15:43:02,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:43:02,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-10-12 15:43:02,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 244. [2020-10-12 15:43:02,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-12 15:43:02,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 283 transitions. [2020-10-12 15:43:02,269 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 283 transitions. Word has length 54 [2020-10-12 15:43:02,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:02,270 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 283 transitions. [2020-10-12 15:43:02,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:43:02,270 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 283 transitions. [2020-10-12 15:43:02,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 15:43:02,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:02,276 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:02,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 15:43:02,276 INFO L427 AbstractCegarLoop]: === Iteration 22 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:02,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:02,277 INFO L82 PathProgramCache]: Analyzing trace with hash 389696732, now seen corresponding path program 1 times [2020-10-12 15:43:02,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:02,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169144799] [2020-10-12 15:43:02,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:02,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:02,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:02,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:02,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 15:43:02,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:02,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-12 15:43:02,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:02,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:43:02,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:43:02,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 15:43:02,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:02,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:02,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:02,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:02,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:02,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:02,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:02,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:43:02,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:02,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:02,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:02,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:02,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:02,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:43:02,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169144799] [2020-10-12 15:43:02,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:43:02,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:43:02,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065634229] [2020-10-12 15:43:02,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:43:02,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:02,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:43:02,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:43:02,833 INFO L87 Difference]: Start difference. First operand 244 states and 283 transitions. Second operand 13 states. [2020-10-12 15:43:03,387 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-10-12 15:43:04,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:04,921 INFO L93 Difference]: Finished difference Result 286 states and 347 transitions. [2020-10-12 15:43:04,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:43:04,925 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-10-12 15:43:04,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:04,927 INFO L225 Difference]: With dead ends: 286 [2020-10-12 15:43:04,927 INFO L226 Difference]: Without dead ends: 283 [2020-10-12 15:43:04,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:43:04,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-12 15:43:04,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 247. [2020-10-12 15:43:04,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-12 15:43:04,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 285 transitions. [2020-10-12 15:43:04,953 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 285 transitions. Word has length 53 [2020-10-12 15:43:04,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:04,954 INFO L479 AbstractCegarLoop]: Abstraction has 247 states and 285 transitions. [2020-10-12 15:43:04,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:43:04,954 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 285 transitions. [2020-10-12 15:43:04,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 15:43:04,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:04,955 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-12 15:43:04,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 15:43:04,956 INFO L427 AbstractCegarLoop]: === Iteration 23 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:04,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:04,956 INFO L82 PathProgramCache]: Analyzing trace with hash 148284582, now seen corresponding path program 2 times [2020-10-12 15:43:04,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:04,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232958293] [2020-10-12 15:43:04,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:04,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:04,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:04,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:05,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:05,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:05,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 15:43:05,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:43:05,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 927 [2020-10-12 15:43:05,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:05,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:43:05,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:43:05,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 15:43:05,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:06,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:06,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:06,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:06,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:06,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:06,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:06,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:43:06,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:06,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:06,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:06,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:06,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:06,291 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:43:06,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232958293] [2020-10-12 15:43:06,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:43:06,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:43:06,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560509094] [2020-10-12 15:43:06,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:43:06,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:06,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:43:06,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:43:06,300 INFO L87 Difference]: Start difference. First operand 247 states and 285 transitions. Second operand 14 states. [2020-10-12 15:43:08,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:08,233 INFO L93 Difference]: Finished difference Result 366 states and 444 transitions. [2020-10-12 15:43:08,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:43:08,234 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-10-12 15:43:08,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:08,236 INFO L225 Difference]: With dead ends: 366 [2020-10-12 15:43:08,236 INFO L226 Difference]: Without dead ends: 267 [2020-10-12 15:43:08,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:43:08,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-12 15:43:08,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 237. [2020-10-12 15:43:08,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-12 15:43:08,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 273 transitions. [2020-10-12 15:43:08,261 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 273 transitions. Word has length 53 [2020-10-12 15:43:08,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:08,261 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 273 transitions. [2020-10-12 15:43:08,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:43:08,262 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 273 transitions. [2020-10-12 15:43:08,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 15:43:08,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:08,263 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:08,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 15:43:08,263 INFO L427 AbstractCegarLoop]: === Iteration 24 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:08,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:08,263 INFO L82 PathProgramCache]: Analyzing trace with hash -177131408, now seen corresponding path program 2 times [2020-10-12 15:43:08,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:08,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773284544] [2020-10-12 15:43:08,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:08,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:08,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:08,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:09,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:09,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 15:43:09,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:43:09,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 750 [2020-10-12 15:43:09,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:09,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:43:09,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:43:09,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 15:43:09,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:09,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:09,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:09,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:09,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:09,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:09,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:09,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:43:09,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:09,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:09,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:09,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:09,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:09,280 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:43:09,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773284544] [2020-10-12 15:43:09,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:43:09,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:43:09,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892582521] [2020-10-12 15:43:09,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:43:09,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:09,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:43:09,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:43:09,282 INFO L87 Difference]: Start difference. First operand 237 states and 273 transitions. Second operand 14 states. [2020-10-12 15:43:10,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:10,797 INFO L93 Difference]: Finished difference Result 269 states and 321 transitions. [2020-10-12 15:43:10,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:43:10,798 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-10-12 15:43:10,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:10,799 INFO L225 Difference]: With dead ends: 269 [2020-10-12 15:43:10,800 INFO L226 Difference]: Without dead ends: 266 [2020-10-12 15:43:10,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:43:10,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-12 15:43:10,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 240. [2020-10-12 15:43:10,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-12 15:43:10,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 276 transitions. [2020-10-12 15:43:10,823 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 276 transitions. Word has length 53 [2020-10-12 15:43:10,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:10,824 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 276 transitions. [2020-10-12 15:43:10,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:43:10,824 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 276 transitions. [2020-10-12 15:43:10,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 15:43:10,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:10,825 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:10,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 15:43:10,825 INFO L427 AbstractCegarLoop]: === Iteration 25 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:10,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:10,826 INFO L82 PathProgramCache]: Analyzing trace with hash -734777055, now seen corresponding path program 1 times [2020-10-12 15:43:10,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:10,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008569199] [2020-10-12 15:43:10,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:10,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:10,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:10,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:11,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:11,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:11,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:11,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:11,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:15,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:15,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 15:43:15,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 15:43:15,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4494 [2020-10-12 15:43:15,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:15,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:43:15,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:43:15,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 15:43:15,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:15,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:15,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:15,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:15,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:15,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:15,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:43:15,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:15,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:15,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:15,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:15,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:15,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 15:43:15,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:15,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:15,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:15,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:15,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:15,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:43:15,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:43:15,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-12 15:43:15,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:15,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:43:15,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:15,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:43:15,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:15,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:43:15,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008569199] [2020-10-12 15:43:15,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:43:15,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:43:15,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218673915] [2020-10-12 15:43:15,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:43:15,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:15,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:43:15,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:43:15,940 INFO L87 Difference]: Start difference. First operand 240 states and 276 transitions. Second operand 16 states. [2020-10-12 15:43:17,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:17,700 INFO L93 Difference]: Finished difference Result 253 states and 298 transitions. [2020-10-12 15:43:17,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:43:17,701 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 56 [2020-10-12 15:43:17,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:17,703 INFO L225 Difference]: With dead ends: 253 [2020-10-12 15:43:17,703 INFO L226 Difference]: Without dead ends: 232 [2020-10-12 15:43:17,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:43:17,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-12 15:43:17,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 227. [2020-10-12 15:43:17,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-12 15:43:17,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 262 transitions. [2020-10-12 15:43:17,725 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 262 transitions. Word has length 56 [2020-10-12 15:43:17,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:17,725 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 262 transitions. [2020-10-12 15:43:17,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:43:17,725 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 262 transitions. [2020-10-12 15:43:17,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 15:43:17,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:17,726 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:17,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 15:43:17,727 INFO L427 AbstractCegarLoop]: === Iteration 26 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:17,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:17,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1372178843, now seen corresponding path program 1 times [2020-10-12 15:43:17,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:17,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749143455] [2020-10-12 15:43:17,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:17,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:17,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:17,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:17,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:17,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:17,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:18,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:18,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:22,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:22,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 15:43:22,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:43:22,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 15:43:22,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:22,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:43:22,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 15:43:22,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 15:43:22,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:22,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:22,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:22,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:22,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:22,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:22,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:22,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:43:22,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:22,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:22,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:22,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:22,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:22,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 15:43:22,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:22,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:22,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:22,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:43:22,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:22,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 15:43:22,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:22,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:43:22,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:22,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:43:22,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:22,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 15:43:22,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:22,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:22,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:22,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-12 15:43:22,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:22,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-12 15:43:22,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:22,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:43:22,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:43:22,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 15:43:22,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 15:43:23,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749143455] [2020-10-12 15:43:23,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:43:23,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-12 15:43:23,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293300008] [2020-10-12 15:43:23,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:43:23,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:23,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:43:23,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:43:23,105 INFO L87 Difference]: Start difference. First operand 227 states and 262 transitions. Second operand 15 states. [2020-10-12 15:43:24,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:24,922 INFO L93 Difference]: Finished difference Result 255 states and 297 transitions. [2020-10-12 15:43:24,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:43:24,924 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2020-10-12 15:43:24,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:24,925 INFO L225 Difference]: With dead ends: 255 [2020-10-12 15:43:24,926 INFO L226 Difference]: Without dead ends: 252 [2020-10-12 15:43:24,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:43:24,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-12 15:43:24,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 243. [2020-10-12 15:43:24,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-12 15:43:24,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 284 transitions. [2020-10-12 15:43:24,950 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 284 transitions. Word has length 57 [2020-10-12 15:43:24,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:24,951 INFO L479 AbstractCegarLoop]: Abstraction has 243 states and 284 transitions. [2020-10-12 15:43:24,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:43:24,951 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 284 transitions. [2020-10-12 15:43:24,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 15:43:24,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:24,952 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:24,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 15:43:24,953 INFO L427 AbstractCegarLoop]: === Iteration 27 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:24,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:24,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1356476263, now seen corresponding path program 1 times [2020-10-12 15:43:24,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:24,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961543333] [2020-10-12 15:43:24,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:24,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:25,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:25,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:25,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 15:43:25,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:43:25,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 594 [2020-10-12 15:43:25,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:25,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:43:25,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 15:43:25,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 15:43:25,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:25,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:25,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:25,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:25,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:25,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:25,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:25,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:43:25,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:25,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:25,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:25,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:25,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:25,723 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 15:43:25,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961543333] [2020-10-12 15:43:25,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:43:25,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:43:25,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794501120] [2020-10-12 15:43:25,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:43:25,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:25,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:43:25,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:43:25,725 INFO L87 Difference]: Start difference. First operand 243 states and 284 transitions. Second operand 13 states. [2020-10-12 15:43:26,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:26,937 INFO L93 Difference]: Finished difference Result 270 states and 330 transitions. [2020-10-12 15:43:26,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:43:26,938 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-10-12 15:43:26,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:26,940 INFO L225 Difference]: With dead ends: 270 [2020-10-12 15:43:26,940 INFO L226 Difference]: Without dead ends: 267 [2020-10-12 15:43:26,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:43:26,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-12 15:43:26,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 246. [2020-10-12 15:43:26,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-12 15:43:26,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 287 transitions. [2020-10-12 15:43:26,964 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 287 transitions. Word has length 56 [2020-10-12 15:43:26,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:26,964 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 287 transitions. [2020-10-12 15:43:26,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:43:26,965 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 287 transitions. [2020-10-12 15:43:26,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 15:43:26,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:26,966 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:26,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 15:43:26,966 INFO L427 AbstractCegarLoop]: === Iteration 28 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:26,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:26,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1838482787, now seen corresponding path program 1 times [2020-10-12 15:43:26,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:26,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585401001] [2020-10-12 15:43:26,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:26,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:26,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:27,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:27,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:27,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:27,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:28,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:28,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:28,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:28,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:28,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:28,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:28,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:31,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:31,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 15:43:31,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 15:43:31,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 15:43:31,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:31,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:43:31,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 15:43:31,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 15:43:31,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:32,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:32,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:32,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:32,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:32,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:32,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:32,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:43:32,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:32,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:32,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:32,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:32,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:32,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 15:43:32,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:32,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:32,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:32,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:32,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:43:32,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:43:32,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-12 15:43:32,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:32,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:43:32,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:32,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:43:32,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:32,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 15:43:32,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:32,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:32,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:32,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:43:32,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:32,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 15:43:32,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:32,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:43:32,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:43:32,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:43:32,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:32,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 15:43:32,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:32,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:32,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:32,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-12 15:43:32,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:32,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:43:32,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:32,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:32,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-12 15:43:32,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:32,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:32,317 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 15:43:32,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585401001] [2020-10-12 15:43:32,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:43:32,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:43:32,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235908982] [2020-10-12 15:43:32,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:43:32,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:32,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:43:32,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:43:32,318 INFO L87 Difference]: Start difference. First operand 246 states and 287 transitions. Second operand 13 states. [2020-10-12 15:43:33,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:33,548 INFO L93 Difference]: Finished difference Result 329 states and 393 transitions. [2020-10-12 15:43:33,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:43:33,550 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2020-10-12 15:43:33,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:33,552 INFO L225 Difference]: With dead ends: 329 [2020-10-12 15:43:33,552 INFO L226 Difference]: Without dead ends: 211 [2020-10-12 15:43:33,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:43:33,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-12 15:43:33,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2020-10-12 15:43:33,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-12 15:43:33,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 242 transitions. [2020-10-12 15:43:33,573 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 242 transitions. Word has length 60 [2020-10-12 15:43:33,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:33,573 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 242 transitions. [2020-10-12 15:43:33,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:43:33,573 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 242 transitions. [2020-10-12 15:43:33,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 15:43:33,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:33,574 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:33,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 15:43:33,575 INFO L427 AbstractCegarLoop]: === Iteration 29 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:33,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:33,575 INFO L82 PathProgramCache]: Analyzing trace with hash -785116163, now seen corresponding path program 1 times [2020-10-12 15:43:33,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:33,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429177757] [2020-10-12 15:43:33,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:33,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:33,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:33,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:33,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 15:43:33,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:33,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-12 15:43:33,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:33,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:43:33,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 15:43:33,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 15:43:33,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:34,128 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-12 15:43:34,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:34,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:34,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:34,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:34,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:34,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:34,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:43:34,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:34,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:34,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:34,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:34,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:34,276 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 15:43:34,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429177757] [2020-10-12 15:43:34,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:43:34,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:43:34,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532528591] [2020-10-12 15:43:34,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:43:34,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:34,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:43:34,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:43:34,277 INFO L87 Difference]: Start difference. First operand 208 states and 242 transitions. Second operand 13 states. [2020-10-12 15:43:34,644 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2020-10-12 15:43:35,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:36,000 INFO L93 Difference]: Finished difference Result 233 states and 282 transitions. [2020-10-12 15:43:36,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:43:36,000 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 59 [2020-10-12 15:43:36,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:36,002 INFO L225 Difference]: With dead ends: 233 [2020-10-12 15:43:36,002 INFO L226 Difference]: Without dead ends: 230 [2020-10-12 15:43:36,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:43:36,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-12 15:43:36,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 211. [2020-10-12 15:43:36,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-12 15:43:36,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 245 transitions. [2020-10-12 15:43:36,031 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 245 transitions. Word has length 59 [2020-10-12 15:43:36,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:36,031 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 245 transitions. [2020-10-12 15:43:36,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:43:36,031 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 245 transitions. [2020-10-12 15:43:36,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 15:43:36,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:36,032 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:36,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 15:43:36,033 INFO L427 AbstractCegarLoop]: === Iteration 30 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:36,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:36,033 INFO L82 PathProgramCache]: Analyzing trace with hash -688626289, now seen corresponding path program 1 times [2020-10-12 15:43:36,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:36,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613442344] [2020-10-12 15:43:36,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:36,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:36,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:36,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:36,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:36,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:37,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:39,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:39,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 15:43:39,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:43:39,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3540 [2020-10-12 15:43:39,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:39,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:43:39,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-12 15:43:39,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 15:43:39,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:39,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:39,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:39,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:39,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:39,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:39,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:39,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:43:39,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:39,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:39,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:39,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:39,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:39,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-12 15:43:39,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:39,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:39,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:39,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:39,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:39,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 15:43:39,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:43:39,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-12 15:43:39,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:39,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:43:39,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:39,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 15:43:39,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:39,821 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 15:43:39,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613442344] [2020-10-12 15:43:39,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:43:39,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 15:43:39,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044878508] [2020-10-12 15:43:39,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:43:39,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:39,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:43:39,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:43:39,823 INFO L87 Difference]: Start difference. First operand 211 states and 245 transitions. Second operand 8 states. [2020-10-12 15:43:40,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:40,468 INFO L93 Difference]: Finished difference Result 233 states and 274 transitions. [2020-10-12 15:43:40,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:43:40,469 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 64 [2020-10-12 15:43:40,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:40,470 INFO L225 Difference]: With dead ends: 233 [2020-10-12 15:43:40,470 INFO L226 Difference]: Without dead ends: 212 [2020-10-12 15:43:40,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:43:40,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-12 15:43:40,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 208. [2020-10-12 15:43:40,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-12 15:43:40,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 241 transitions. [2020-10-12 15:43:40,490 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 241 transitions. Word has length 64 [2020-10-12 15:43:40,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:40,491 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 241 transitions. [2020-10-12 15:43:40,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:43:40,491 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 241 transitions. [2020-10-12 15:43:40,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 15:43:40,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:40,492 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:40,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 15:43:40,492 INFO L427 AbstractCegarLoop]: === Iteration 31 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:40,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:40,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1672000950, now seen corresponding path program 2 times [2020-10-12 15:43:40,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:40,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693443031] [2020-10-12 15:43:40,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:40,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:40,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:40,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:40,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:40,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:42,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:42,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 15:43:42,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:43:42,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1691 [2020-10-12 15:43:42,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:42,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:43:42,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:43:42,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 15:43:42,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:42,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:42,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:42,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:42,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:42,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:42,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:42,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:43:42,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:42,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:42,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:42,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:42,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:42,546 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:43:42,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693443031] [2020-10-12 15:43:42,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:43:42,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:43:42,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986761833] [2020-10-12 15:43:42,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:43:42,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:42,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:43:42,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:43:42,548 INFO L87 Difference]: Start difference. First operand 208 states and 241 transitions. Second operand 14 states. [2020-10-12 15:43:44,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:44,042 INFO L93 Difference]: Finished difference Result 231 states and 275 transitions. [2020-10-12 15:43:44,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:43:44,042 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 64 [2020-10-12 15:43:44,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:44,045 INFO L225 Difference]: With dead ends: 231 [2020-10-12 15:43:44,045 INFO L226 Difference]: Without dead ends: 227 [2020-10-12 15:43:44,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:43:44,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-12 15:43:44,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 214. [2020-10-12 15:43:44,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-12 15:43:44,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 248 transitions. [2020-10-12 15:43:44,066 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 248 transitions. Word has length 64 [2020-10-12 15:43:44,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:44,066 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 248 transitions. [2020-10-12 15:43:44,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:43:44,066 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 248 transitions. [2020-10-12 15:43:44,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 15:43:44,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:44,067 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:44,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 15:43:44,068 INFO L427 AbstractCegarLoop]: === Iteration 32 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:44,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:44,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1654004747, now seen corresponding path program 3 times [2020-10-12 15:43:44,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:44,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453238540] [2020-10-12 15:43:44,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:44,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:44,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:44,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:44,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:44,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 15:43:44,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:43:44,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 557 [2020-10-12 15:43:44,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:44,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:43:44,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:43:44,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 15:43:44,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:45,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:45,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:45,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:45,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:45,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:45,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:43:45,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:45,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:45,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:45,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:45,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:45,109 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:43:45,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453238540] [2020-10-12 15:43:45,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:43:45,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:43:45,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525581394] [2020-10-12 15:43:45,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:43:45,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:45,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:43:45,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:43:45,111 INFO L87 Difference]: Start difference. First operand 214 states and 248 transitions. Second operand 17 states. [2020-10-12 15:43:47,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:47,595 INFO L93 Difference]: Finished difference Result 334 states and 393 transitions. [2020-10-12 15:43:47,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:43:47,596 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2020-10-12 15:43:47,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:47,598 INFO L225 Difference]: With dead ends: 334 [2020-10-12 15:43:47,598 INFO L226 Difference]: Without dead ends: 331 [2020-10-12 15:43:47,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:43:47,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-12 15:43:47,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 287. [2020-10-12 15:43:47,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-10-12 15:43:47,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 332 transitions. [2020-10-12 15:43:47,621 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 332 transitions. Word has length 67 [2020-10-12 15:43:47,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:47,622 INFO L479 AbstractCegarLoop]: Abstraction has 287 states and 332 transitions. [2020-10-12 15:43:47,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:43:47,622 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 332 transitions. [2020-10-12 15:43:47,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 15:43:47,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:47,623 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:47,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 15:43:47,623 INFO L427 AbstractCegarLoop]: === Iteration 33 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:47,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:47,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1328588757, now seen corresponding path program 3 times [2020-10-12 15:43:47,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:47,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26311505] [2020-10-12 15:43:47,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:47,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:47,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:47,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:48,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:48,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 15:43:48,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:43:48,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 735 [2020-10-12 15:43:48,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:48,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:43:48,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:43:48,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 15:43:48,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:48,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:48,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:48,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:48,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:48,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:48,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:48,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:43:48,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:48,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:48,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:48,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:48,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:48,941 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:43:48,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26311505] [2020-10-12 15:43:48,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:43:48,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:43:48,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493118605] [2020-10-12 15:43:48,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:43:48,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:48,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:43:48,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:43:48,942 INFO L87 Difference]: Start difference. First operand 287 states and 332 transitions. Second operand 17 states. [2020-10-12 15:43:51,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:51,166 INFO L93 Difference]: Finished difference Result 399 states and 477 transitions. [2020-10-12 15:43:51,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:43:51,167 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2020-10-12 15:43:51,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:51,169 INFO L225 Difference]: With dead ends: 399 [2020-10-12 15:43:51,169 INFO L226 Difference]: Without dead ends: 281 [2020-10-12 15:43:51,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:43:51,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-12 15:43:51,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 268. [2020-10-12 15:43:51,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-12 15:43:51,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 305 transitions. [2020-10-12 15:43:51,193 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 305 transitions. Word has length 67 [2020-10-12 15:43:51,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:51,194 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 305 transitions. [2020-10-12 15:43:51,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:43:51,194 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 305 transitions. [2020-10-12 15:43:51,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 15:43:51,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:51,195 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:51,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 15:43:51,196 INFO L427 AbstractCegarLoop]: === Iteration 34 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:51,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:51,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1880558461, now seen corresponding path program 2 times [2020-10-12 15:43:51,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:51,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677163038] [2020-10-12 15:43:51,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:51,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:51,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:51,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:51,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 15:43:51,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:43:51,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 571 [2020-10-12 15:43:51,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:51,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:43:51,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 15:43:51,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 15:43:51,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:52,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:52,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:52,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:52,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:52,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:52,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:43:52,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:52,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:52,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:52,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:52,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:52,364 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:43:52,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677163038] [2020-10-12 15:43:52,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:43:52,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:43:52,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276362626] [2020-10-12 15:43:52,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:43:52,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:52,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:43:52,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:43:52,366 INFO L87 Difference]: Start difference. First operand 268 states and 305 transitions. Second operand 17 states. [2020-10-12 15:43:53,104 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 82 [2020-10-12 15:43:55,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:55,602 INFO L93 Difference]: Finished difference Result 319 states and 380 transitions. [2020-10-12 15:43:55,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:43:55,603 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 70 [2020-10-12 15:43:55,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:55,605 INFO L225 Difference]: With dead ends: 319 [2020-10-12 15:43:55,605 INFO L226 Difference]: Without dead ends: 316 [2020-10-12 15:43:55,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2020-10-12 15:43:55,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-12 15:43:55,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 274. [2020-10-12 15:43:55,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-12 15:43:55,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 311 transitions. [2020-10-12 15:43:55,630 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 311 transitions. Word has length 70 [2020-10-12 15:43:55,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:55,630 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 311 transitions. [2020-10-12 15:43:55,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:43:55,630 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 311 transitions. [2020-10-12 15:43:55,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 15:43:55,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:55,632 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:55,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 15:43:55,632 INFO L427 AbstractCegarLoop]: === Iteration 35 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:55,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:55,632 INFO L82 PathProgramCache]: Analyzing trace with hash -325516296, now seen corresponding path program 2 times [2020-10-12 15:43:55,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:55,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658315259] [2020-10-12 15:43:55,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:55,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:56,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:56,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 15:43:56,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:56,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 392 [2020-10-12 15:43:56,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:56,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:43:56,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:43:56,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 15:43:56,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:56,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:56,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:56,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:56,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:56,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:56,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:56,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:43:56,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:56,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:56,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:56,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:56,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:56,889 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:43:56,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658315259] [2020-10-12 15:43:56,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:43:56,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:43:56,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806195469] [2020-10-12 15:43:56,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:43:56,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:56,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:43:56,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:43:56,891 INFO L87 Difference]: Start difference. First operand 274 states and 311 transitions. Second operand 17 states. [2020-10-12 15:43:57,183 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2020-10-12 15:43:57,417 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-10-12 15:43:57,707 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 94 [2020-10-12 15:43:57,900 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-10-12 15:43:58,270 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 102 [2020-10-12 15:43:58,637 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 112 [2020-10-12 15:43:58,900 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2020-10-12 15:44:01,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:01,284 INFO L93 Difference]: Finished difference Result 318 states and 377 transitions. [2020-10-12 15:44:01,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:44:01,286 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-10-12 15:44:01,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:01,288 INFO L225 Difference]: With dead ends: 318 [2020-10-12 15:44:01,288 INFO L226 Difference]: Without dead ends: 315 [2020-10-12 15:44:01,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2020-10-12 15:44:01,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-12 15:44:01,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 277. [2020-10-12 15:44:01,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-12 15:44:01,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 313 transitions. [2020-10-12 15:44:01,313 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 313 transitions. Word has length 73 [2020-10-12 15:44:01,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:01,313 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 313 transitions. [2020-10-12 15:44:01,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:44:01,314 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 313 transitions. [2020-10-12 15:44:01,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 15:44:01,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:01,315 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:01,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 15:44:01,315 INFO L427 AbstractCegarLoop]: === Iteration 36 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:01,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:01,316 INFO L82 PathProgramCache]: Analyzing trace with hash 296836930, now seen corresponding path program 4 times [2020-10-12 15:44:01,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:01,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196011200] [2020-10-12 15:44:01,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:01,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:01,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:01,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:01,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:02,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:02,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 15:44:02,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:44:02,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1484 [2020-10-12 15:44:02,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:02,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:44:02,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:44:02,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 15:44:02,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:44:03,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:03,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:03,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:03,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:03,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:03,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:03,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:03,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:03,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:03,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:03,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:03,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:03,526 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 22 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:03,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196011200] [2020-10-12 15:44:03,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:03,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:44:03,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721846452] [2020-10-12 15:44:03,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:44:03,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:03,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:44:03,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:44:03,528 INFO L87 Difference]: Start difference. First operand 277 states and 313 transitions. Second operand 18 states. [2020-10-12 15:44:04,458 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 60 [2020-10-12 15:44:04,645 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 66 [2020-10-12 15:44:06,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:06,634 INFO L93 Difference]: Finished difference Result 393 states and 467 transitions. [2020-10-12 15:44:06,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:44:06,635 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 73 [2020-10-12 15:44:06,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:06,637 INFO L225 Difference]: With dead ends: 393 [2020-10-12 15:44:06,637 INFO L226 Difference]: Without dead ends: 297 [2020-10-12 15:44:06,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2020-10-12 15:44:06,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-12 15:44:06,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 267. [2020-10-12 15:44:06,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-10-12 15:44:06,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 301 transitions. [2020-10-12 15:44:06,662 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 301 transitions. Word has length 73 [2020-10-12 15:44:06,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:06,662 INFO L479 AbstractCegarLoop]: Abstraction has 267 states and 301 transitions. [2020-10-12 15:44:06,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:44:06,662 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 301 transitions. [2020-10-12 15:44:06,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 15:44:06,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:06,663 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:06,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 15:44:06,663 INFO L427 AbstractCegarLoop]: === Iteration 37 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:06,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:06,664 INFO L82 PathProgramCache]: Analyzing trace with hash -28579060, now seen corresponding path program 4 times [2020-10-12 15:44:06,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:06,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400161210] [2020-10-12 15:44:06,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:06,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:06,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:06,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:06,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:07,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:07,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 15:44:07,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:44:07,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1309 [2020-10-12 15:44:07,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:07,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:44:07,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:44:07,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 15:44:07,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:08,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:08,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:08,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:08,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:08,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:08,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:44:08,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:08,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:08,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:08,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:08,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:08,521 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 14 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:08,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400161210] [2020-10-12 15:44:08,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:08,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:44:08,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192381032] [2020-10-12 15:44:08,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:44:08,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:08,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:44:08,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:44:08,523 INFO L87 Difference]: Start difference. First operand 267 states and 301 transitions. Second operand 18 states. [2020-10-12 15:44:11,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:11,444 INFO L93 Difference]: Finished difference Result 299 states and 348 transitions. [2020-10-12 15:44:11,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:44:11,445 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 73 [2020-10-12 15:44:11,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:11,447 INFO L225 Difference]: With dead ends: 299 [2020-10-12 15:44:11,447 INFO L226 Difference]: Without dead ends: 296 [2020-10-12 15:44:11,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2020-10-12 15:44:11,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-10-12 15:44:11,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 270. [2020-10-12 15:44:11,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-12 15:44:11,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 304 transitions. [2020-10-12 15:44:11,480 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 304 transitions. Word has length 73 [2020-10-12 15:44:11,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:11,481 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 304 transitions. [2020-10-12 15:44:11,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:44:11,481 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 304 transitions. [2020-10-12 15:44:11,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-12 15:44:11,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:11,482 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:11,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 15:44:11,483 INFO L427 AbstractCegarLoop]: === Iteration 38 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:11,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:11,483 INFO L82 PathProgramCache]: Analyzing trace with hash 865201975, now seen corresponding path program 1 times [2020-10-12 15:44:11,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:11,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043480132] [2020-10-12 15:44:11,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:11,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:11,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:11,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:11,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:11,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:11,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:11,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:13,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:14,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:14,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:15,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:15,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:16,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:16,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-12 15:44:16,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 15:44:16,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 15:44:16,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:16,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 15:44:16,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-12 15:44:16,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 15:44:16,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:16,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:16,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:16,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:16,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:16,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:16,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:16,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:16,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:16,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:16,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:16,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:16,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:16,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-12 15:44:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:16,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:16,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:16,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 15:44:16,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:16,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-12 15:44:16,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:16,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:44:16,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:16,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 15:44:16,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:16,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-12 15:44:16,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:16,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:16,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:16,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-12 15:44:16,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:16,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 15:44:16,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:16,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:44:16,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:44:16,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 15:44:16,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:17,221 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 15:44:17,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043480132] [2020-10-12 15:44:17,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:17,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 15:44:17,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472425242] [2020-10-12 15:44:17,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 15:44:17,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:17,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 15:44:17,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:44:17,223 INFO L87 Difference]: Start difference. First operand 270 states and 304 transitions. Second operand 20 states. [2020-10-12 15:44:18,415 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-10-12 15:44:19,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:19,657 INFO L93 Difference]: Finished difference Result 302 states and 347 transitions. [2020-10-12 15:44:19,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 15:44:19,658 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 77 [2020-10-12 15:44:19,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:19,660 INFO L225 Difference]: With dead ends: 302 [2020-10-12 15:44:19,660 INFO L226 Difference]: Without dead ends: 299 [2020-10-12 15:44:19,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 15:44:19,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-12 15:44:19,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 288. [2020-10-12 15:44:19,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-10-12 15:44:19,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 328 transitions. [2020-10-12 15:44:19,690 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 328 transitions. Word has length 77 [2020-10-12 15:44:19,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:19,690 INFO L479 AbstractCegarLoop]: Abstraction has 288 states and 328 transitions. [2020-10-12 15:44:19,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 15:44:19,690 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 328 transitions. [2020-10-12 15:44:19,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-12 15:44:19,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:19,692 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:19,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 15:44:19,692 INFO L427 AbstractCegarLoop]: === Iteration 39 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:19,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:19,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1231806645, now seen corresponding path program 2 times [2020-10-12 15:44:19,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:19,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67977412] [2020-10-12 15:44:19,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:19,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:19,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:20,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:20,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:20,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 15:44:20,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:44:20,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 980 [2020-10-12 15:44:20,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:20,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:44:20,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 15:44:20,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 15:44:20,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:21,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:21,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:21,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:21,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:21,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:21,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:21,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:21,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:21,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:21,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:21,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:21,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 15:44:21,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67977412] [2020-10-12 15:44:21,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:21,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:44:21,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464350824] [2020-10-12 15:44:21,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:44:21,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:21,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:44:21,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:44:21,606 INFO L87 Difference]: Start difference. First operand 288 states and 328 transitions. Second operand 17 states. [2020-10-12 15:44:22,405 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 76 [2020-10-12 15:44:22,621 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 66 [2020-10-12 15:44:22,846 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 70 [2020-10-12 15:44:25,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:25,236 INFO L93 Difference]: Finished difference Result 315 states and 374 transitions. [2020-10-12 15:44:25,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:44:25,237 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-10-12 15:44:25,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:25,239 INFO L225 Difference]: With dead ends: 315 [2020-10-12 15:44:25,239 INFO L226 Difference]: Without dead ends: 312 [2020-10-12 15:44:25,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2020-10-12 15:44:25,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-12 15:44:25,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 291. [2020-10-12 15:44:25,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-10-12 15:44:25,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 331 transitions. [2020-10-12 15:44:25,270 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 331 transitions. Word has length 76 [2020-10-12 15:44:25,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:25,271 INFO L479 AbstractCegarLoop]: Abstraction has 291 states and 331 transitions. [2020-10-12 15:44:25,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:44:25,271 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 331 transitions. [2020-10-12 15:44:25,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-12 15:44:25,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:25,272 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:25,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 15:44:25,273 INFO L427 AbstractCegarLoop]: === Iteration 40 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:25,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:25,273 INFO L82 PathProgramCache]: Analyzing trace with hash 213622657, now seen corresponding path program 1 times [2020-10-12 15:44:25,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:25,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821425974] [2020-10-12 15:44:25,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:25,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:25,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:25,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:25,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:25,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:25,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:25,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:25,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:28,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:29,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:29,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:29,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:29,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:29,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:30,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:30,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:30,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:30,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-12 15:44:30,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 15:44:30,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 15:44:30,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:30,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 15:44:30,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-12 15:44:30,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 15:44:30,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:30,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:30,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:30,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:30,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:30,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:30,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:30,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:44:30,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:30,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:30,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:30,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:30,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:30,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-12 15:44:30,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:30,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:30,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:30,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:30,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:30,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 15:44:30,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:44:30,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-12 15:44:30,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:30,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:44:30,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:30,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 15:44:30,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:30,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-12 15:44:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:30,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:30,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:30,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:44:30,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:30,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 15:44:30,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:30,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:44:30,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:44:30,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:44:30,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:30,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-12 15:44:30,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:30,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:30,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:30,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-12 15:44:30,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:30,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 15:44:30,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:30,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:44:30,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:44:30,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 15:44:30,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:30,912 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-12 15:44:30,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821425974] [2020-10-12 15:44:30,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:30,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:44:30,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795852023] [2020-10-12 15:44:30,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:44:30,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:30,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:44:30,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:44:30,916 INFO L87 Difference]: Start difference. First operand 291 states and 331 transitions. Second operand 18 states. [2020-10-12 15:44:32,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:32,887 INFO L93 Difference]: Finished difference Result 385 states and 459 transitions. [2020-10-12 15:44:32,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:44:32,888 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2020-10-12 15:44:32,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:32,891 INFO L225 Difference]: With dead ends: 385 [2020-10-12 15:44:32,891 INFO L226 Difference]: Without dead ends: 309 [2020-10-12 15:44:32,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2020-10-12 15:44:32,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-12 15:44:32,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 293. [2020-10-12 15:44:32,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-10-12 15:44:32,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 339 transitions. [2020-10-12 15:44:32,918 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 339 transitions. Word has length 80 [2020-10-12 15:44:32,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:32,918 INFO L479 AbstractCegarLoop]: Abstraction has 293 states and 339 transitions. [2020-10-12 15:44:32,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:44:32,919 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 339 transitions. [2020-10-12 15:44:32,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-12 15:44:32,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:32,920 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:32,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 15:44:32,920 INFO L427 AbstractCegarLoop]: === Iteration 41 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:32,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:32,920 INFO L82 PathProgramCache]: Analyzing trace with hash -432687923, now seen corresponding path program 1 times [2020-10-12 15:44:32,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:32,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500153906] [2020-10-12 15:44:32,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:32,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:32,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:32,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:33,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:33,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:34,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:34,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:34,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:34,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:34,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:35,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:37,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:37,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:37,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-12 15:44:37,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 15:44:37,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 15:44:37,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:37,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 15:44:37,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:44:37,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-12 15:44:37,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:38,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:38,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:38,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:38,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:38,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:38,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:38,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:38,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:38,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:38,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:38,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:38,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:38,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-12 15:44:38,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:38,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:38,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:38,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:38,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 15:44:38,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:44:38,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-12 15:44:38,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:38,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:44:38,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:38,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 15:44:38,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:38,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-12 15:44:38,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:38,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:38,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:38,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:38,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 15:44:38,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:44:38,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-12 15:44:38,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:38,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:44:38,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:44:38,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 15:44:38,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:38,733 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-12 15:44:38,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-12 15:44:38,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:38,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:38,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:38,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:38,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-12 15:44:38,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:44:38,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-12 15:44:38,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:38,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:44:38,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:44:38,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 15:44:38,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:39,447 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-10-12 15:44:39,481 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:39,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500153906] [2020-10-12 15:44:39,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:39,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:44:39,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10889253] [2020-10-12 15:44:39,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:44:39,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:39,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:44:39,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:44:39,484 INFO L87 Difference]: Start difference. First operand 293 states and 339 transitions. Second operand 18 states. [2020-10-12 15:44:42,421 WARN L193 SmtUtils]: Spent 719.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2020-10-12 15:44:44,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:44,720 INFO L93 Difference]: Finished difference Result 403 states and 495 transitions. [2020-10-12 15:44:44,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 15:44:44,721 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2020-10-12 15:44:44,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:44,724 INFO L225 Difference]: With dead ends: 403 [2020-10-12 15:44:44,724 INFO L226 Difference]: Without dead ends: 327 [2020-10-12 15:44:44,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2020-10-12 15:44:44,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-12 15:44:44,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 308. [2020-10-12 15:44:44,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-10-12 15:44:44,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 365 transitions. [2020-10-12 15:44:44,760 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 365 transitions. Word has length 82 [2020-10-12 15:44:44,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:44,761 INFO L479 AbstractCegarLoop]: Abstraction has 308 states and 365 transitions. [2020-10-12 15:44:44,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:44:44,761 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 365 transitions. [2020-10-12 15:44:44,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-12 15:44:44,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:44,763 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:44,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 15:44:44,764 INFO L427 AbstractCegarLoop]: === Iteration 42 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:44,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:44,764 INFO L82 PathProgramCache]: Analyzing trace with hash -773363303, now seen corresponding path program 2 times [2020-10-12 15:44:44,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:44,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200425762] [2020-10-12 15:44:44,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:44,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:44,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:45,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:45,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-12 15:44:45,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:45,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 950 [2020-10-12 15:44:45,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:45,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:44:45,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 15:44:45,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 15:44:45,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:46,068 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-10-12 15:44:46,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:46,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:46,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:46,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:46,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:46,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:46,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:46,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:46,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:46,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:46,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:46,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:46,763 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 15:44:46,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200425762] [2020-10-12 15:44:46,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:46,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:44:46,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30220053] [2020-10-12 15:44:46,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:44:46,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:46,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:44:46,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:44:46,765 INFO L87 Difference]: Start difference. First operand 308 states and 365 transitions. Second operand 17 states. [2020-10-12 15:44:47,199 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-10-12 15:44:47,479 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-10-12 15:44:47,646 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2020-10-12 15:44:48,012 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 101 [2020-10-12 15:44:48,409 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2020-10-12 15:44:48,628 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2020-10-12 15:44:50,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:50,988 INFO L93 Difference]: Finished difference Result 329 states and 398 transitions. [2020-10-12 15:44:50,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:44:50,989 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-10-12 15:44:50,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:50,991 INFO L225 Difference]: With dead ends: 329 [2020-10-12 15:44:50,991 INFO L226 Difference]: Without dead ends: 326 [2020-10-12 15:44:50,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2020-10-12 15:44:50,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-10-12 15:44:51,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 311. [2020-10-12 15:44:51,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2020-10-12 15:44:51,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 368 transitions. [2020-10-12 15:44:51,029 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 368 transitions. Word has length 79 [2020-10-12 15:44:51,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:51,030 INFO L479 AbstractCegarLoop]: Abstraction has 311 states and 368 transitions. [2020-10-12 15:44:51,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:44:51,030 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 368 transitions. [2020-10-12 15:44:51,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-12 15:44:51,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:51,031 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:51,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 15:44:51,032 INFO L427 AbstractCegarLoop]: === Iteration 43 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:51,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:51,032 INFO L82 PathProgramCache]: Analyzing trace with hash 288790595, now seen corresponding path program 1 times [2020-10-12 15:44:51,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:51,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184221011] [2020-10-12 15:44:51,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:51,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:51,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:51,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:51,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:51,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:51,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:51,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:51,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:56,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:56,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-12 15:44:56,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:44:56,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 15:44:56,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:56,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:44:56,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-12 15:44:56,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 15:44:56,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:44:56,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:56,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:56,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:56,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:56,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:56,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:56,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:56,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:56,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:56,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:56,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:56,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:56,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-12 15:44:56,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:56,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:56,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:56,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:56,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:56,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 15:44:56,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:44:56,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-12 15:44:56,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:56,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:44:56,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:56,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 15:44:56,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:56,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-12 15:44:56,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:56,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:56,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:56,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-12 15:44:56,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:56,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 15:44:56,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:56,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:44:56,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:44:56,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 15:44:56,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:56,439 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 15:44:56,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184221011] [2020-10-12 15:44:56,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:56,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:44:56,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867418192] [2020-10-12 15:44:56,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:44:56,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:56,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:44:56,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:44:56,441 INFO L87 Difference]: Start difference. First operand 311 states and 368 transitions. Second operand 11 states. [2020-10-12 15:44:57,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:57,751 INFO L93 Difference]: Finished difference Result 415 states and 509 transitions. [2020-10-12 15:44:57,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:44:57,752 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2020-10-12 15:44:57,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:57,755 INFO L225 Difference]: With dead ends: 415 [2020-10-12 15:44:57,755 INFO L226 Difference]: Without dead ends: 304 [2020-10-12 15:44:57,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:44:57,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-12 15:44:57,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 298. [2020-10-12 15:44:57,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-10-12 15:44:57,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 347 transitions. [2020-10-12 15:44:57,820 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 347 transitions. Word has length 83 [2020-10-12 15:44:57,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:57,823 INFO L479 AbstractCegarLoop]: Abstraction has 298 states and 347 transitions. [2020-10-12 15:44:57,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:44:57,824 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 347 transitions. [2020-10-12 15:44:57,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-12 15:44:57,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:57,825 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:57,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 15:44:57,825 INFO L427 AbstractCegarLoop]: === Iteration 44 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:57,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:57,826 INFO L82 PathProgramCache]: Analyzing trace with hash 707056521, now seen corresponding path program 1 times [2020-10-12 15:44:57,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:57,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806750953] [2020-10-12 15:44:57,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:57,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:57,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:58,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:58,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:59,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:59,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:59,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:59,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:00,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:00,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:01,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:02,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:02,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-12 15:45:02,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 15:45:02,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 15:45:02,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:02,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 15:45:02,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 15:45:02,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-12 15:45:02,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:02,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:02,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:02,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:02,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:02,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:02,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:02,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:02,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:02,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:02,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:02,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:02,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:02,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-12 15:45:02,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:03,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:03,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:03,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 15:45:03,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:03,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-12 15:45:03,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:03,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:45:03,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:03,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 15:45:03,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:03,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-12 15:45:03,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:03,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:03,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:03,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:03,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:03,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:45:03,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:45:03,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 397 [2020-10-12 15:45:03,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:03,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:45:03,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:45:03,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:45:03,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:04,202 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-10-12 15:45:04,527 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2020-10-12 15:45:05,135 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2020-10-12 15:45:05,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-12 15:45:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:05,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:05,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:05,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:05,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-12 15:45:05,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:45:05,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-12 15:45:05,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:05,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:45:05,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:45:05,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 15:45:05,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:07,019 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 133 DAG size of output: 77 [2020-10-12 15:45:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 15:45:08,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806750953] [2020-10-12 15:45:08,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:08,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 15:45:08,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664682075] [2020-10-12 15:45:08,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 15:45:08,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:08,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 15:45:08,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:45:08,084 INFO L87 Difference]: Start difference. First operand 298 states and 347 transitions. Second operand 23 states. [2020-10-12 15:45:08,489 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-10-12 15:45:10,393 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-12 15:45:11,345 WARN L193 SmtUtils]: Spent 582.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 15:45:12,604 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-10-12 15:45:14,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:14,383 INFO L93 Difference]: Finished difference Result 334 states and 402 transitions. [2020-10-12 15:45:14,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 15:45:14,384 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 87 [2020-10-12 15:45:14,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:14,386 INFO L225 Difference]: With dead ends: 334 [2020-10-12 15:45:14,386 INFO L226 Difference]: Without dead ends: 331 [2020-10-12 15:45:14,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=191, Invalid=1531, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 15:45:14,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-12 15:45:14,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 313. [2020-10-12 15:45:14,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-10-12 15:45:14,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 366 transitions. [2020-10-12 15:45:14,424 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 366 transitions. Word has length 87 [2020-10-12 15:45:14,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:14,424 INFO L479 AbstractCegarLoop]: Abstraction has 313 states and 366 transitions. [2020-10-12 15:45:14,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 15:45:14,424 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 366 transitions. [2020-10-12 15:45:14,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-12 15:45:14,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:14,426 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:14,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 15:45:14,426 INFO L427 AbstractCegarLoop]: === Iteration 45 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:14,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:14,426 INFO L82 PathProgramCache]: Analyzing trace with hash -252280422, now seen corresponding path program 3 times [2020-10-12 15:45:14,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:14,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66577277] [2020-10-12 15:45:14,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:14,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:14,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:14,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:14,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:14,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:17,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:17,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 15:45:17,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:45:17,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3077 [2020-10-12 15:45:17,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:17,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:45:17,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:45:17,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-12 15:45:17,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:18,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:18,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:18,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:18,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:18,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:18,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:18,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:18,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:18,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:18,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:18,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:18,264 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 20 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:18,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66577277] [2020-10-12 15:45:18,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:18,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:45:18,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827579700] [2020-10-12 15:45:18,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:45:18,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:18,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:45:18,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:45:18,266 INFO L87 Difference]: Start difference. First operand 313 states and 366 transitions. Second operand 18 states. [2020-10-12 15:45:21,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:21,213 INFO L93 Difference]: Finished difference Result 359 states and 424 transitions. [2020-10-12 15:45:21,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 15:45:21,214 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 84 [2020-10-12 15:45:21,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:21,216 INFO L225 Difference]: With dead ends: 359 [2020-10-12 15:45:21,217 INFO L226 Difference]: Without dead ends: 355 [2020-10-12 15:45:21,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 15:45:21,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-10-12 15:45:21,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 319. [2020-10-12 15:45:21,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-10-12 15:45:21,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 373 transitions. [2020-10-12 15:45:21,254 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 373 transitions. Word has length 84 [2020-10-12 15:45:21,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:21,254 INFO L479 AbstractCegarLoop]: Abstraction has 319 states and 373 transitions. [2020-10-12 15:45:21,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:45:21,254 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 373 transitions. [2020-10-12 15:45:21,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-12 15:45:21,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:21,256 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:21,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 15:45:21,256 INFO L427 AbstractCegarLoop]: === Iteration 46 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:21,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:21,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1759180685, now seen corresponding path program 1 times [2020-10-12 15:45:21,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:21,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99996918] [2020-10-12 15:45:21,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:21,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:21,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:21,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:21,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:21,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:21,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:21,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:24,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:26,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:26,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-12 15:45:26,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:45:26,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-12 15:45:26,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:26,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:45:26,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:45:26,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-12 15:45:26,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:26,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:26,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:26,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:26,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:26,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:26,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:26,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:26,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:26,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:26,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:26,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:26,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:26,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-12 15:45:26,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:26,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:26,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:26,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 15:45:26,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:26,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 15:45:26,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:26,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:45:26,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:26,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 15:45:26,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:26,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-12 15:45:26,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:26,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:26,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:26,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:27,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:27,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 15:45:27,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:45:27,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1163 [2020-10-12 15:45:27,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:27,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:45:27,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:45:27,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 15:45:27,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:27,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-12 15:45:27,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:27,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:27,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:27,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:27,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:27,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:45:27,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:45:27,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-12 15:45:27,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:27,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:45:27,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:27,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:45:27,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:28,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:45:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:28,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:28,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:28,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:28,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:28,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:45:28,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:28,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:45:28,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:28,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 15:45:28,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:28,025 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 15:45:28,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99996918] [2020-10-12 15:45:28,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:28,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:45:28,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828730924] [2020-10-12 15:45:28,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:45:28,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:28,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:45:28,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:45:28,027 INFO L87 Difference]: Start difference. First operand 319 states and 373 transitions. Second operand 18 states. [2020-10-12 15:45:29,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:29,765 INFO L93 Difference]: Finished difference Result 454 states and 570 transitions. [2020-10-12 15:45:29,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 15:45:29,766 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-10-12 15:45:29,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:29,769 INFO L225 Difference]: With dead ends: 454 [2020-10-12 15:45:29,769 INFO L226 Difference]: Without dead ends: 353 [2020-10-12 15:45:29,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2020-10-12 15:45:29,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-10-12 15:45:29,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 341. [2020-10-12 15:45:29,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-10-12 15:45:29,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 412 transitions. [2020-10-12 15:45:29,803 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 412 transitions. Word has length 91 [2020-10-12 15:45:29,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:29,803 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 412 transitions. [2020-10-12 15:45:29,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:45:29,804 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 412 transitions. [2020-10-12 15:45:29,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-12 15:45:29,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:29,805 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-12 15:45:29,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 15:45:29,806 INFO L427 AbstractCegarLoop]: === Iteration 47 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:29,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:29,806 INFO L82 PathProgramCache]: Analyzing trace with hash 316151207, now seen corresponding path program 5 times [2020-10-12 15:45:29,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:29,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070964009] [2020-10-12 15:45:29,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:29,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:29,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:29,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:30,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:30,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-12 15:45:30,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:45:30,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1138 [2020-10-12 15:45:30,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:30,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 15:45:30,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:45:30,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-12 15:45:30,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:32,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:32,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:32,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:32,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:32,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:32,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:32,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:32,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:32,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:32,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:32,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:32,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:32,401 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:32,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070964009] [2020-10-12 15:45:32,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:32,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 15:45:32,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136303946] [2020-10-12 15:45:32,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 15:45:32,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:32,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 15:45:32,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:45:32,402 INFO L87 Difference]: Start difference. First operand 341 states and 412 transitions. Second operand 21 states. [2020-10-12 15:45:33,297 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-10-12 15:45:36,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:36,843 INFO L93 Difference]: Finished difference Result 475 states and 571 transitions. [2020-10-12 15:45:36,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:45:36,844 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 87 [2020-10-12 15:45:36,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:36,847 INFO L225 Difference]: With dead ends: 475 [2020-10-12 15:45:36,847 INFO L226 Difference]: Without dead ends: 472 [2020-10-12 15:45:36,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2020-10-12 15:45:36,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-10-12 15:45:36,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 428. [2020-10-12 15:45:36,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2020-10-12 15:45:36,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 510 transitions. [2020-10-12 15:45:36,891 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 510 transitions. Word has length 87 [2020-10-12 15:45:36,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:36,891 INFO L479 AbstractCegarLoop]: Abstraction has 428 states and 510 transitions. [2020-10-12 15:45:36,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 15:45:36,892 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 510 transitions. [2020-10-12 15:45:36,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-12 15:45:36,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:36,894 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:36,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-12 15:45:36,894 INFO L427 AbstractCegarLoop]: === Iteration 48 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:36,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:36,894 INFO L82 PathProgramCache]: Analyzing trace with hash -9264783, now seen corresponding path program 5 times [2020-10-12 15:45:36,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:36,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223484279] [2020-10-12 15:45:36,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:36,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:36,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:37,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:38,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:38,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-12 15:45:38,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:45:38,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1494 [2020-10-12 15:45:38,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:38,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 15:45:38,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:45:38,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-12 15:45:38,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:38,738 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-10-12 15:45:38,954 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-12 15:45:39,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:39,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:39,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:39,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:39,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:39,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:39,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:39,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:39,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:39,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:39,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:39,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223484279] [2020-10-12 15:45:39,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:39,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 15:45:39,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675442789] [2020-10-12 15:45:39,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 15:45:39,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:39,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 15:45:39,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:45:39,795 INFO L87 Difference]: Start difference. First operand 428 states and 510 transitions. Second operand 21 states. [2020-10-12 15:45:45,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:45,068 INFO L93 Difference]: Finished difference Result 584 states and 731 transitions. [2020-10-12 15:45:45,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:45:45,069 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 87 [2020-10-12 15:45:45,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:45,073 INFO L225 Difference]: With dead ends: 584 [2020-10-12 15:45:45,073 INFO L226 Difference]: Without dead ends: 422 [2020-10-12 15:45:45,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2020-10-12 15:45:45,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-10-12 15:45:45,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 409. [2020-10-12 15:45:45,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2020-10-12 15:45:45,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 483 transitions. [2020-10-12 15:45:45,156 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 483 transitions. Word has length 87 [2020-10-12 15:45:45,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:45,157 INFO L479 AbstractCegarLoop]: Abstraction has 409 states and 483 transitions. [2020-10-12 15:45:45,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 15:45:45,157 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 483 transitions. [2020-10-12 15:45:45,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-12 15:45:45,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:45,160 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:45,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-12 15:45:45,160 INFO L427 AbstractCegarLoop]: === Iteration 49 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:45,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:45,161 INFO L82 PathProgramCache]: Analyzing trace with hash 2055686279, now seen corresponding path program 1 times [2020-10-12 15:45:45,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:45,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960072953] [2020-10-12 15:45:45,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:45,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:45,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:45,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking...